PyPI · #840 most downloaded on PyPI

langfuse

4.15.426M downloads/molangfuse/langfuse-python ↗New releases in your daily digest, changelog included.

Langfuse Python SDK - LLM observability/tracing, datasets, experiments, LLM-as-a-judge evaluation, and prompt management

Last release today
16 Sep 2026
Ships on a steady schedule
a new release about every 2 weeks
Nearly every release is documented
notes for 60 of the last 60 stable releases
3 versions withdrawn
withdrawn after publishing
3 years old
551 releases · first in 2023

Release timeline

551 releases since 2023

2023202420252026

20232026

One column per quarter.

Releases

3.10.4a13 Dec 2025pre-release
Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.10.4...v3.10.4a1
Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.10.4...v3.10.4a1

Open source →
3.10.31 Dec 2025
fix(gemini): gemini input token calculation when implicit cache is hit using langchain by @aablsk in https://github.com/langfuse/langfuse-python/pull/
What's Changed

fix(gemini): gemini input token calculation when implicit cache is hit using langchain by @aablsk in https://github.com/langfuse/langfuse-python/pull/1451

feat(api): update API spec from langfuse/langfuse ad16fa0 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1454

feat: Add comment field to langfuse Evaluation from autoevals metadata by @rmaceissoft in https://github.com/langfuse/langfuse-python/pull/1452

feat(langchain): allow injecting trace_context into LangchainCallbackHandler (#1419) by @fhoering in https://github.com/langfuse/langfuse-python/pull/1458

feat(api): update API spec from langfuse/langfuse cb16277 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1459

fix(resource-manager): reuse passed tracer provider for reinit by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1461

New Contributors

@aablsk made their first contribution in https://github.com/langfuse/langfuse-python/pull/1451

@rmaceissoft made their first contribution in https://github.com/langfuse/langfuse-python/pull/1452

@fhoering made their first contribution in https://github.com/langfuse/langfuse-python/pull/1419

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.10.2...v3.10.3

3.10.21 Dec 2025

docs(experiments): evaluation value cannot be None by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1446

What's Changed

docs(experiments): evaluation value cannot be None by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1446
chore(deps-dev): bump langchain-core from 1.0.0 to 1.0.7 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1447
fix(openai): handle pydantic BaseModel as metadata by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1449
fix(datasets): add schema arguments to create_dataset by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1457
fix(prompts): evict prompt cache on NotFound error (#1442) by @Betensis in https://github.com/langfuse/langfuse-python/pull/1456

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.10.1...v3.10.2

Open source →

3.10.119 Nov 2025

feat(api): update API spec from langfuse/langfuse e1f390d by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1439

What's Changed

feat(api): update API spec from langfuse/langfuse e1f390d by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1439
feat(api): update API spec from langfuse/langfuse 53b8ec8 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1441
feat(api): update API spec from langfuse/langfuse 34d42bc by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1443
fix(client): url encode dataset name by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1445

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.10.0...v3.10.1

Open source →

3.10.014 Nov 2025

feat(evals): add run_batched_evaluation by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1436

What's Changed

feat(evals): add run_batched_evaluation by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1436

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.9.3...v3.10.0

Open source →

3.9.4a013 Nov 2025pre-release

Nothing published for this version

3.9.312 Nov 2025

feat(api): update API spec from langfuse/langfuse db01ff9 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1435

What's Changed

feat(api): update API spec from langfuse/langfuse db01ff9 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1435
fix(experiments): move evals out of root span by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1437

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.9.2...v3.9.3

Open source →

3.9.3a112 Nov 2025pre-release

Nothing published for this version

3.9.3a012 Nov 2025pre-release

Nothing published for this version

3.9.211 Nov 2025

fix(client): handle update_current_trace on non recorded spans gracefully by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1432

What's Changed

fix(client): handle update_current_trace on non recorded spans gracefully by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1432
fix(experiments): remove evals from main execution span by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1433

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.9.1...v3.9.2

Open source →

3.9.16 Nov 2025

feat(api): update API spec from langfuse/langfuse efe3532 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1425

What's Changed

feat(api): update API spec from langfuse/langfuse efe3532 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1425
chore(deps-dev): bump langgraph-checkpoint from 2.1.2 to 3.0.0 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1427
feat(api): update API spec from langfuse/langfuse 25e6ad9 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1428

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.9.0...v3.9.1

Open source →

3.9.03 Nov 2025

feat(api): update API spec from langfuse/langfuse 258cc51 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1420

What's Changed

feat(api): update API spec from langfuse/langfuse 258cc51 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1420
fix: avoid empty status message when capturing exception in observe decorator by @Jonas1312 in https://github.com/langfuse/langfuse-python/pull/1417
feat(client): propagate trace attributes onto all child spans on update by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1415

New Contributors

@Jonas1312 made their first contribution in https://github.com/langfuse/langfuse-python/pull/1417

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.8.1...v3.9.0

Open source →

3.8.122 Oct 2025

feat(api): update API spec from langfuse/langfuse f5e96a9 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1408

What's Changed

feat(api): update API spec from langfuse/langfuse f5e96a9 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1408
feat(api): update API spec from langfuse/langfuse 1ded68c by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1414
feat(api): update API spec from langfuse/langfuse 62d2959 by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1416
chore(client): move to LANGFUSE_BASE_URL by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1418

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.8.0...v3.8.1

Open source →

3.8.020 Oct 2025

chore: drops support for Python 3.9 (end of life)

What's Changed

chore: drops support for Python 3.9 (end of life)
fix(client): HTTP headers concatenated by dashes instead of snakecase by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1404
feat(langchain): add v1 support by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1411

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.7.0...v3.8.0

Open source →

3.7.016 Oct 2025

feat(api): update API spec from langfuse/langfuse fa2979b by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1403

What's Changed

feat(api): update API spec from langfuse/langfuse fa2979b by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1403
feat(observe): handle starlette.StreamingResponse by @yorickvP in https://github.com/langfuse/langfuse-python/pull/1394

New Contributors

@yorickvP made their first contribution in https://github.com/langfuse/langfuse-python/pull/1394

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.6.2...v3.7.0

Open source →

3.6.210 Oct 2025

feat(api): update API spec from langfuse/langfuse dee644d by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1398

What's Changed

feat(api): update API spec from langfuse/langfuse dee644d by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1398
fix: ensure ingestion and media queues are always flushed by @abhishar432 in https://github.com/langfuse/langfuse-python/pull/1401

New Contributors

@abhishar432 made their first contribution in https://github.com/langfuse/langfuse-python/pull/1401

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.6.1...v3.6.2

Open source →

3.6.12 Oct 2025

fix(experiments): pass full evaluation to score creation by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1391

What's Changed

fix(experiments): pass full evaluation to score creation by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1391

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.6.0...v3.6.1

Open source →

3.6.01 Oct 2025

feat(api): update API spec from langfuse/langfuse 9b8868a by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1384

What's Changed

feat(api): update API spec from langfuse/langfuse 9b8868a by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1384
fix(client): setting OTEL span status as error on Langfuse error (#1387) by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1388

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.5.2...v3.6.0

Open source →

3.5.228 Sept 2025

fix(observe): handle generator context propagation by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1383

What's Changed

fix(observe): handle generator context propagation by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1383

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.5.1...v3.5.2

Open source →

3.5.125 Sept 2025

fix(langchain): maintain async context in tool executions by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1380

What's Changed

fix(langchain): maintain async context in tool executions by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1380

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.5.0...v3.5.1

Open source →

3.5.018 Sept 2025

chore(deps): bump pydantic from 2.11.7 to 2.11.9 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1343

What's Changed

chore(deps): bump pydantic from 2.11.7 to 2.11.9 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1343
fix(prompt-placeholders): don't strip tool calls from placeholder messages by @nimarb in https://github.com/langfuse/langfuse-python/pull/1346
chore(deps-dev): bump pytest from 8.4.1 to 8.4.2 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1322
chore(typo): fix minor typos in langfuse client comments by @jitokim in https://github.com/langfuse/langfuse-python/pull/1350
feat: support custom export path to export spans by @yash025 in https://github.com/langfuse/langfuse-python/pull/1342
chore: test to validate multiple calls to update_trace don't drop att… by @nimarb in https://github.com/langfuse/langfuse-python/pull/1369
feat(api): update API spec from langfuse/langfuse a7d59d7b by @langfuse-bot in https://github.com/langfuse/langfuse-python/pull/1371
feat(openai): add openai embeddings api support (#1345) by @minimAluminiumalism in https://github.com/langfuse/langfuse-python/pull/1372

New Contributors

@jitokim made their first contribution in https://github.com/langfuse/langfuse-python/pull/1350
@yash025 made their first contribution in https://github.com/langfuse/langfuse-python/pull/1342
@minimAluminiumalism made their first contribution in https://github.com/langfuse/langfuse-python/pull/1372
@langfuse-bot made their first contribution in https://github.com/langfuse/langfuse-python/pull/1371

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.4.0...v3.5.0

Open source →

3.4.017 Sept 2025

feat(experiments): add experiment runner by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1334

What's Changed

feat(experiments): add experiment runner by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1334

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.3.5...v3.4.0

Open source →

3.3.516 Sept 2025

fix(langchain): set cost to zero on errors by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1328

What's Changed

fix(langchain): set cost to zero on errors by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1328
fix(client): pass env var tracing environment to resource manager by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1331
fix(openai): handle None arguments in tool calls by @Zentorno in https://github.com/langfuse/langfuse-python/pull/1339
fix(get_client): preserve properties on client such as environment by @nimarb in https://github.com/langfuse/langfuse-python/pull/1341
chore(deps-dev): bump langgraph from 0.6.6 to 0.6.7 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1327
fix(prompt-folders): update prompt in folder failed with wrong encoding by @aaguirre-rdit in https://github.com/langfuse/langfuse-python/pull/1335

New Contributors

@Zentorno made their first contribution in https://github.com/langfuse/langfuse-python/pull/1339
@aaguirre-rdit made their first contribution in https://github.com/langfuse/langfuse-python/pull/1335

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.3.4...v3.3.5

Open source →

3.3.42 Sept 2025

add prompt cache invalidation functionality by @cemasma in https://github.com/langfuse/langfuse-python/pull/1278

What's Changed

add prompt cache invalidation functionality by @cemasma in https://github.com/langfuse/langfuse-python/pull/1278
feat(client): add optional override default cache ttl capability for prompt caching by @cemasma in https://github.com/langfuse/langfuse-python/pull/1249
fix(langchain): parse tool_calls from AIMessage by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1316
fix(openai): openrouter non-streamed cost tracking by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1319

New Contributors

@cemasma made their first contribution in https://github.com/langfuse/langfuse-python/pull/1278

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.3.3...v3.3.4

Open source →

3.3.31 Sept 2025

chore(deps-dev): bump ruff from 0.12.10 to 0.12.11 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1315

What's Changed

chore(deps-dev): bump ruff from 0.12.10 to 0.12.11 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1315
fix(langchain): token detach exceptions in async contexts by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1317

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.3.2...v3.3.3

Open source →

3.3.227 Aug 2025

feat(langchain): set callback spans to active in OTEL context by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1310

What's Changed

feat(langchain): set callback spans to active in OTEL context by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1310
fix: add support for capturing usage details with ChatBedRock by @pbvignesh in https://github.com/langfuse/langfuse-python/pull/1267
feat(openai): add openrouter cost tracking by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1311
fix(langchain): do not end span on agent callbacks by @qnnn and @hassiebp in https://github.com/langfuse/langfuse-python/pull/1312
fix: resolve GCS bad request error in media uploads. by @Jay-flow in https://github.com/langfuse/langfuse-python/pull/1265
fix(span): fallback to client environment if not provided by @Digma in https://github.com/langfuse/langfuse-python/pull/1304

New Contributors

@pbvignesh made their first contribution in https://github.com/langfuse/langfuse-python/pull/1267
@Jay-flow made their first contribution in https://github.com/langfuse/langfuse-python/pull/1265
@Digma made their first contribution in https://github.com/langfuse/langfuse-python/pull/1304
@qnnn made their first contribution in https://github.com/langfuse/langfuse-python/pull/1312

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.3.1...v3.3.2

Open source →

3.3.126 Aug 2025

feat(traces): add more observation types by @nimarb in https://github.com/langfuse/langfuse-python/pull/1290

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.3.1...v3.3.1

What's Changed

feat(traces): add more observation types by @nimarb in https://github.com/langfuse/langfuse-python/pull/1290
chore: update default value docs for FLUSH_AT and FLUSH_INTERVAL by @qnnn in https://github.com/langfuse/langfuse-python/pull/1306
fix(langchain): capture usage on streamed gemini responses by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1309

New Contributors

@qnnn made their first contribution in https://github.com/langfuse/langfuse-python/pull/1306

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.3.0...v3.3.1

Open source →

3.3.019 Aug 2025

feat(langchain): add update_trace argument by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1302

What's Changed

feat(langchain): add update_trace argument by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1302

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.8...v3.3.0

Open source →

3.2.818 Aug 2025

fix(openai): handle async response api input and outputs by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1301

What's Changed

fix(openai): handle async response api input and outputs by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1301

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.7...v3.2.8

Open source →

3.2.715 Aug 2025

fix(langchain): take only int values in parsed usage by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1299

What's Changed

fix(langchain): take only int values in parsed usage by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1299

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.6...v3.2.7

Open source →

3.2.614 Aug 2025

fix(client): skip string serialization in attribute values by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1297

What's Changed

fix(client): skip string serialization in attribute values by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1297

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.5...v3.2.6

Open source →

3.2.514 Aug 2025

chore: specify otlp http exporter dep by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1295

What's Changed

chore: specify otlp http exporter dep by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1295

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.4...v3.2.5

Open source →

3.2.412 Aug 2025

chore(deps-dev): bump starlette from 0.40.0 to 0.47.2 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1274

What's Changed

chore(deps-dev): bump starlette from 0.40.0 to 0.47.2 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1274
chore: remove unnecessary deps by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1285
fix(client): add warning message if OTEL_SDK_DISABLED by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1291
chore(deps): bump openai from 1.99.5 to 1.99.6 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1287
fix(langchain): keep trace attributes on non-chain llm runs by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1293
feat(openai): add support for response.parse by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1292

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.3...v3.2.4

Open source →

3.2.38 Aug 2025

perf(langchain): send trace updates on root span by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1284

What's Changed

perf(langchain): send trace updates on root span by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1284

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.2...v3.2.3

Open source →

3.2.25 Aug 2025

feat(decorator): require langfuse_public_key only in top most decorated func by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1281

What's Changed

feat(decorator): require langfuse_public_key only in top most decorated func by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1281
docs: update readme and reference by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1260
chore(deps): bump aiohttp from 3.10.11 to 3.12.14 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1258
chore: add claude file by @nimarb in https://github.com/langfuse/langfuse-python/pull/1268
chore(client): add check for tracing setting by @tim-hilde in https://github.com/langfuse/langfuse-python/pull/1269
chore(types): fix mapvalue and init by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1271
fix openai.py: when tool_call is a empty list, it raise an `list in… by @badbye in https://github.com/langfuse/langfuse-python/pull/1263
chore: relax packaging constraint by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1273
chore: reduce claude permissions by @nimarb in https://github.com/langfuse/langfuse-python/pull/1276
fix: avoid private import of Langfuse to satisify Pyright by @janwinkler1 in https://github.com/langfuse/langfuse-python/pull/1275
fix(client): parse env vars for debug and tracing enabled case insensitive by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1279

New Contributors

@tim-hilde made their first contribution in https://github.com/langfuse/langfuse-python/pull/1269
@badbye made their first contribution in https://github.com/langfuse/langfuse-python/pull/1263
@janwinkler1 made their first contribution in https://github.com/langfuse/langfuse-python/pull/1275

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.1...v3.2.2

Open source →

3.2.116 Jul 2025

chore: bump urllib3 by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1256

What's Changed

chore: bump urllib3 by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1256
chore: add mypy support by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1257
fix(observe): wrap returned async generators by @kouk and @hassiebp in https://github.com/langfuse/langfuse-python/pull/1259

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.2.0...v3.2.1

Open source →

3.2.014 Jul 2025

feat: add serialization of numpy ndarray by @marcklingen in https://github.com/langfuse/langfuse-python/pull/1246

What's Changed

feat: add serialization of numpy ndarray by @marcklingen in https://github.com/langfuse/langfuse-python/pull/1246
feat(client): allow setting additional headers by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1248
feat(client): allow setting separate tracerprovider by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1254
feat(client): allow updating span/generation name by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1255
fix(openai): allow setting trace_id and parent_observation_id by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1245
fix(serializer): NaN to string rather than None by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1253
fix(client): allow using get_trace_url without active span by @skekfab in https://github.com/langfuse/langfuse-python/pull/1251
chore(deps-dev): bump llama-index-core from 0.12.25 to 0.12.41 by @dependabot[bot] in https://github.com/langfuse/langfuse-python/pull/1247

New Contributors

@skekfab made their first contribution in https://github.com/langfuse/langfuse-python/pull/1251

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.1.3...v3.2.0

Open source →

3.1.37 Jul 2025

fix(media): do not mutate vertex media dict by @philipshurpik in https://github.com/langfuse/langfuse-python/pull/1243

What's Changed

fix(media): do not mutate vertex media dict by @philipshurpik in https://github.com/langfuse/langfuse-python/pull/1243
fix(flushing): flush interval to millis in SpanProcessor by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1244

New Contributors

@philipshurpik made their first contribution in https://github.com/langfuse/langfuse-python/pull/1243

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.1.2...v3.1.3

Open source →

3.1.24 Jul 2025

fix(langchain): do not stringify metadata unnecessarily by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1237

What's Changed

fix(langchain): do not stringify metadata unnecessarily by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1237
chore: add good .env defaults by @nimarb in https://github.com/langfuse/langfuse-python/pull/1239
fix(openai): add check for metadata NotGiven by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1240
fix(scores): skip sampling if OTEL sampler not available by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1241
fix(dataset-run-items): correctly typ datasetRunItems.list by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1242

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.1.1...v3.1.2

Open source →

3.1.12 Jul 2025

fix(client): do not escape url param with httpx > 0.28 by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1236

What's Changed

fix(client): do not escape url param with httpx > 0.28 by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1236

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.1.0...v3.1.1

Open source →

3.1.02 Jul 2025

feat(prompts): chat message placeholders by @nimarb in https://github.com/langfuse/langfuse-python/pull/1222

What's Changed

feat(prompts): chat message placeholders by @nimarb in https://github.com/langfuse/langfuse-python/pull/1222

New Contributors

@nimarb made their first contribution in https://github.com/langfuse/langfuse-python/pull/1222

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.9...v3.1.0

Open source →

3.0.91 Jul 2025

Nothing published for this version

3.0.829 Jun 2025

feat(langchain): add last trace id property to CallbackHandler by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1230

What's Changed

feat(langchain): add last trace id property to CallbackHandler by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1230
fix(openai): chat.completions.parse out of beta by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1231

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.7...v3.0.8

Open source →

3.0.727 Jun 2025

fix(client): auth check on missing credentials by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1224

What's Changed

fix(client): auth check on missing credentials by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1224
fix(flushing): rely on OTEL default flush settings by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1229

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.6...v3.0.7

Open source →

3.0.626 Jun 2025

fix(prompts): escape json in get_langchain_prompt by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1226

What's Changed

fix(prompts): escape json in get_langchain_prompt by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1226

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.5...v3.0.6

Open source →

3.0.524 Jun 2025

feat(client): allow filtering spans by instrumentation scope name by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1223

What's Changed

feat(client): allow filtering spans by instrumentation scope name by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1223
fix(observe): default IO capture on decorated functions by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1221

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.4...v3.0.5

Open source →

3.0.423 Jun 2025

fix(client): use tracing_enabled in get_client by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1220

What's Changed

fix(client): use tracing_enabled in get_client by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1220

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.3...v3.0.4

Open source →

3.0.318 Jun 2025

fix(client): correctly scope client in multiproject setups by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1218

What's Changed

fix(client): correctly scope client in multiproject setups by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1218
chore(deps): bump protobuf from 5.29.4 to 5.29.5 by @dependabot in https://github.com/langfuse/langfuse-python/pull/1216

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.2...v3.0.3

Open source →

3.0.216 Jun 2025

fix: set timeout to 5 seconds by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1211

What's Changed

fix: set timeout to 5 seconds by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1211
chore(deps): bump requests from 2.32.3 to 2.32.4 by @dependabot in https://github.com/langfuse/langfuse-python/pull/1209
feat(langchain): langfuse trace attributes in run invocation config by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1213
fix(client): url encoding slashes by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1214
fix(resource-manager): do not register processor if tracing disabled by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1215

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.1...v3.0.2

Open source →

3.0.111 Jun 2025

fix: treat usage_metadata.total_token_count of vertex ai as total by @gion-pop in https://github.com/langfuse/langfuse-python/pull/1208

What's Changed

fix: treat usage_metadata.total_token_count of vertex ai as total by @gion-pop in https://github.com/langfuse/langfuse-python/pull/1208
fix(client): scope mask function to resources singleton by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1210

New Contributors

@gion-pop made their first contribution in https://github.com/langfuse/langfuse-python/pull/1208

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.0...v3.0.1

Open source →

3.0.05 Jun 2025

This is the new OTEL-based Langfuse Python SDK. See the our changelog post for more details and let us know your feedback in this GitHub Discussion.

What's Changed

This is the new OTEL-based Langfuse Python SDK. See the our changelog post for more details and let us know your feedback in this GitHub Discussion.

Learn more

Open source →

3.0.0b54 Jun 2025pre-release

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.0b4...v3.0.0b5

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.0b4...v3.0.0b5

Open source →

3.0.0b328 May 2025pre-release

feat(observe): allow disabling function io capture by env var by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1196

What's Changed

feat(observe): allow disabling function io capture by env var by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1196
feat(media): allow disabling media handling via envvar by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1199
fix(langchain): token counts for vertex by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1197
fix(langchain): filter string keys from usage object by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1191

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.0b2...v3.0.0b3

Open source →

3.0.0b222 May 2025pre-release

fix(environments): correctly propagate client attribute by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1188

What's Changed

fix(environments): correctly propagate client attribute by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1188
feat(core): add support for observation events by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1189

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v3.0.0-alpha.1...v3.0.0b2

Open source →

3.0.0b120 May 2025pre-release

Nothing published for this version

3.0.0a43 Jun 2025pre-release

Nothing published for this version

2.60.1016 Sept 2025

Nothing published for this version

2.60.929 Jun 2025

fix(openai): chat completions parse out of beta (sdk-v2) by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1232

What's Changed

fix(openai): chat completions parse out of beta (sdk-v2) by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1232

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v2.60.8...v2.60.9

Open source →

2.60.83 Jun 2025

fix(langchain): deployment version in azure model by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1203

What's Changed

fix(langchain): deployment version in azure model by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1203

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v2.60.7...v2.60.8

Open source →

2.60.727 May 2025

fix(langchain): vertex token counts by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1198

What's Changed

fix(langchain): vertex token counts by @hassiebp in https://github.com/langfuse/langfuse-python/pull/1198

Full Changelog: https://github.com/langfuse/langfuse-python/compare/v2.60.6...v2.60.7

Open source →

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