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PyPI · #3171 most downloaded on PyPI
AI Observability and Evaluation
Last release 4 days ago
23 Sep 2026
Ships on a steady schedule
a new release about every 8 days
Nearly every release is documented
notes for 60 of the last 60 stable releases
19 versions withdrawn
withdrawn after publishing
4 years old
697 releases · first in 2023
One column per quarter.
add id fields to annotations so that relay caches annotations correctly
default prompt / completion tokens to 0
components: Disclosure (fka Accordion)
show a breakdown of tokens in the project header
playground: add common base class for OpenAI and AzureOpenAI streaming clients
increase default wait time for uvicorn server process start
playground: Update o1 model listing and params
increase python upper bound to include python 3.13
playground: support arbitrary string model names
sslmode query parameter in postgresql database url for asyncpg
sessions: add session details page
sessions feature (#5674)sessions feature (#5674) (71ba01b)client: add timeout parameters to log_evaluations, get_evaluations
Add cancel button to playground runs
playground: release playground feature
system message from anthropic spans (#5527) (838d348)Implement "Move Output" button on Playground Output
None as a template formatter option for messages (#5500) (c439257)isawaitable check (#5508) (73d8287)add environment variable for default admin initial password
Display playground chat completion errors within output card
auth: ensure auth works behind a proxy
Add Google AI Studio support (for Gemini models w/ an API key)
Add empty state, helper tooltips, when provider clients are not installed in Playground
Add environment configuration for fastapi + gql extensions
response_format to invocation parameters (#5239) (2ea4100)Add Annotate button and slide over to run metadata footer
px.Client().get_dataset_versions should use self._client.get instead of httpx.get (#5220) (c810e16)embeddings from core dependencies (#5150) (fab0ca2)playground: do nothing on credential form submit
Refactor subscription streaming and plumb through anthropic support
add support for secure wss connection
playground: add openai as a container dependency
make model listing more generic
llm.input_messages for playground span replay (#4906) (f4b1d92)add Starlette middleware for checking Cross-Site Request Forgery (CSRF) when trusted origins are specified via environment variable
handle badly ingested llm spans gracefully
create optional dependency group for umap-learn and fast-hdbscan
replace hdbscan with fast-hdbscan
bump strawberry-graphql version to 0.243.1
handle ndarray for json.dumps in encode_span_to_otlp
update LangGraph agent fixtures path
### Bug Fixes * support numpy 2
update fixtures.py to include new demos
Remove legacy instrumentation modules
/exports when auth is enabled (#4589) (b7af851)Secure attribute on cookies (#4520) (655a459)exp from jwt (#4729) (0e6e1e8)Add environment variable setting for structured logging
TraceDataset.to_span() should unflatten dot separators at all levels
### Bug Fixes * submodule packaging for bazel
### Features * adds o1 testing demo project
get_retrieved_documents should handle missing values
Fix typo and update ensure dataloader results ordering
incorporate schema for postgresql and add integration test
tools: Display tool schema definitions in the UI
ui: add the ability to turn off auto-refresh of projects
experiments: ensure compare experiments page does not break for experiments that contain a large number of examples
improve timeout error message for query_spans method
onboarding: New project onboarding
Add Experiments API to OpenAPI Schema
### Bug Fixes * format code
Add list_experiments client method
list_experiments client method (#4271) (a063d83)auth: add login/ logout routes and createUser mutation
auth: add expiry support for system keys
register API documentation (#4280) (819236c)phoenix.otel package (#4230) (4e2ad61)auth: add user role, exclude system in user lists
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