PyPI · #2746 most downloaded on PyPI

onnxscript

0.7.22.9M downloads/momicrosoft/onnxscript ↗New releases in your daily digest, changelog included.

Naturally author ONNX functions and models using a subset of Python

Last release 3 days ago
16 Sep 2026
Ships on a steady schedule
a new release about every 9 days
Nearly every release is documented
notes for 25 of 26 stable releases
Nothing withdrawn
no release was ever pulled
3 years old
722 releases · first in 2023

Release timeline

722 releases since 2023

2023202420252026

20232026

One column per quarter.

Releases

0.3.0.dev2025062020 Jun 2025pre-release
Nothing published for this version
0.3.0.dev2025061919 Jun 2025pre-release
Nothing published for this version
0.3.0.dev2025061818 Jun 2025pre-release
Nothing published for this version
0.3.0.dev2025061717 Jun 2025pre-release

0.2.728 May 2025

What's Changed

Optimizer and rewriter

Optimize causal mask shape by @gramalingam in https://github.com/microsoft/onnxscript/pull/2325
Fix handling of attention-bias in MHA fusion by @gramalingam in https://github.com/microsoft/onnxscript/pull/2332
Ensure rule ordering in MHA fusion by @gramalingam in https://github.com/microsoft/onnxscript/pull/2334
Rewriter: Fold Batchnorm nodes by @AyoubMDL in https://github.com/microsoft/onnxscript/pull/2312
Refine shape optimization by @gramalingam in https://github.com/microsoft/onnxscript/pull/2336

ONNX IR

[IR][fix] Implement copy() for graph inputs/outputs by @justinchuby in https://github.com/microsoft/onnxscript/pull/2338
Add type checks to Attr methods by @justinchuby in https://github.com/microsoft/onnxscript/pull/2310
[IR] Handle external initializers in subgraphs by @justinchuby in https://github.com/microsoft/onnxscript/pull/2347

Torch Lib

[torchlib] Update linear implementation to support 1d weights by @justinchuby in https://github.com/microsoft/onnxscript/pull/2340
[torchlib] Implement floor_divide for int inputs by @justinchuby in https://github.com/microsoft/onnxscript/pull/2343

Other Changes

Update publish pipeline to use an environment by @justinchuby in https://github.com/microsoft/onnxscript/pull/2330
Update publish as a deployment job by @justinchuby in https://github.com/microsoft/onnxscript/pull/2333

Full Changelog: https://github.com/microsoft/onnxscript/compare/v0.2.6...v0.2.7

Open source →

0.2.622 May 2025

What's Changed

Breaking Changes

Remove the RefAttr class by @justinchuby in https://github.com/microsoft/onnxscript/pull/2328
[IR] Normalize "ai.onnx" domain to "" by @justinchuby in https://github.com/microsoft/onnxscript/pull/2283

Optimizer and rewriter

Add BiasGelu, Erfgelu and SkipLayerNormalization fusions by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2222
Allow sdpa fusion to accept custom scale factor by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2210
Add support for a non-backtracking version of pattern disjunction by @gramalingam in https://github.com/microsoft/onnxscript/pull/2242
Rewrite Skip fusions with check functions by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2259
Add support for backtracking in pattern matcher by @gramalingam in https://github.com/microsoft/onnxscript/pull/2273
Add fusion rules (Whisper optimizations) by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2221
Use OrPatterns to support SkipLayerNormalization rewrite variations by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2277
Unify rule implementations with classes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2288

ONNX IR

[IR] Handle invalid output deserialization by @justinchuby in https://github.com/microsoft/onnxscript/pull/2223
[IR] Improve documentation 1/n by @justinchuby in https://github.com/microsoft/onnxscript/pull/2227
Improve ir.node annotations to accept None inputs by @justinchuby in https://github.com/microsoft/onnxscript/pull/2224
Update type annotations for passes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2230
Add LazyTensor class to implement ir.TensorProtocol by @justinchuby in https://github.com/microsoft/onnxscript/pull/2232
[IR] Support specifying output value in Tape by @justinchuby in https://github.com/microsoft/onnxscript/pull/2225
[IR] Allow to copy an unfrozen version of the Shape by @justinchuby in https://github.com/microsoft/onnxscript/pull/2238
[IR] Use shape.freeze() by @justinchuby in https://github.com/microsoft/onnxscript/pull/2247
[IR] Fix sequence handling in tensor function by @justinchuby in https://github.com/microsoft/onnxscript/pull/2252
[IR] Introduce short name for dtypes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2249
[IR] Display constant tensors for Value by @justinchuby in https://github.com/microsoft/onnxscript/pull/2248
[IR] Refactor TensorBase to simplify implementation by @justinchuby in https://github.com/microsoft/onnxscript/pull/2081
[pass] Update DCE passes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2257
Create short tensor str for nodes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2262
[Pass] Support lifting subgraph initializers to main graph by @titaiwangms in https://github.com/microsoft/onnxscript/pull/2266
Add add/remove initializers passes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2253
[IR] Export all common passes in onnxscript.ir.passes.common by @justinchuby in https://github.com/microsoft/onnxscript/pull/2270
[IR] Record owning graph for input/output/initializers by @justinchuby in https://github.com/microsoft/onnxscript/pull/2282
Add from_onnx_text function to convert ONNX text to IR model by @justinchuby in https://github.com/microsoft/onnxscript/pull/2291
[IR] Docs for Node by @justinchuby in https://github.com/microsoft/onnxscript/pull/2297
[IR] introduce slice support on graph by @Johansmm in https://github.com/microsoft/onnxscript/pull/2307

Torch Lib

[torchlib] Fix scatter reduce on error cases by @justinchuby in https://github.com/microsoft/onnxscript/pull/2287

Documentation

Improvement to IR docs 2/n by @justinchuby in https://github.com/microsoft/onnxscript/pull/2229

Other Changes

Generate opset23 with opgen by @justinchuby in https://github.com/microsoft/onnxscript/pull/2226
Update proto comparison error message by @justinchuby in https://github.com/microsoft/onnxscript/pull/2215
Refactor test models for ort_fusions by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2237
Use ir methods to replace onnx helper by @justinchuby in https://github.com/microsoft/onnxscript/pull/2091
Export version_converter and support model proto by @justinchuby in https://github.com/microsoft/onnxscript/pull/2251
Fix attribute handling in autocast by @justinchuby in https://github.com/microsoft/onnxscript/pull/2256
Update optimize_for_ort call to allow debug and shape_inference modes by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2236
Temporarily skip the whisper test in skip layernorm fusion by @justinchuby in https://github.com/microsoft/onnxscript/pull/2286
Returning choice values in patterns by @gramalingam in https://github.com/microsoft/onnxscript/pull/2284
Fix docs builder pipeline by @justinchuby in https://github.com/microsoft/onnxscript/pull/2293
Split pattern.py by @gramalingam in https://github.com/microsoft/onnxscript/pull/2296
Fix rename within comments by @gramalingam in https://github.com/microsoft/onnxscript/pull/2305
Create publish-dev.yml for ESRP release by @justinchuby in https://github.com/microsoft/onnxscript/pull/2101
Update CONTRIBUTING.md to remove the note about production by @justinchuby in https://github.com/microsoft/onnxscript/pull/2308
Fix RewriterContext import error by @gramalingam in https://github.com/microsoft/onnxscript/pull/2314
Update publish-dev.yml by @justinchuby in https://github.com/microsoft/onnxscript/pull/2306
Fix bug in handling constants in cos sin fusion by @gramalingam in https://github.com/microsoft/onnxscript/pull/2319
Fixes to version converter by @gramalingam in https://github.com/microsoft/onnxscript/pull/2318
Disable fused_matmul_rule_sets by @titaiwangms in https://github.com/microsoft/onnxscript/pull/2321
Remove unnecessary warning by @xadupre in https://github.com/microsoft/onnxscript/pull/2327
Cleanup mha-bias rules using disjunction by @gramalingam in https://github.com/microsoft/onnxscript/pull/2326
Create official ESRP publishing pipelines by @justinchuby in https://github.com/microsoft/onnxscript/pull/2320

Full Changelog: https://github.com/microsoft/onnxscript/compare/v0.2.5...v0.2.6

Open source →

0.2.523 Apr 2025

What's Changed

Breaking Changes

Constructor of ir.Function now takes metadata_props from the ir.Graph object. https://github.com/microsoft/onnxscript/pull/2182

Core ONNX Script

Annotate script() with ParamSpec for more accurate typing by @justinchuby in https://github.com/microsoft/onnxscript/pull/2178
Replace ast.NameConstant with ast.Constant and remove duplicates by @justinchuby in https://github.com/microsoft/onnxscript/pull/2188

Optimizer and rewriter

Introduce pattern.any_value by @gramalingam in https://github.com/microsoft/onnxscript/pull/2175
[Pass] Fix bugs in LiftConstantsToInitializersPass by @titaiwangms in https://github.com/microsoft/onnxscript/pull/2189
[pass] Avoid lifting tensors that are too small to initializers by @justinchuby in https://github.com/microsoft/onnxscript/pull/2190
Avoid using fixed value for max_pos_ids in cos_sin_cache fusion by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2167
Add fusion rule to fuse (query, key, value) to a packed QKV for GQA by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2174
Update constant fold to use correct numpy type by @justinchuby in https://github.com/microsoft/onnxscript/pull/2204
Remove legacy optimizer by @justinchuby in https://github.com/microsoft/onnxscript/pull/2180
[Pass] Remove metadata_props and doc_string from the model by @titaiwangms in https://github.com/microsoft/onnxscript/pull/2182

ONNX IR

[Pass] Support lift constants to initializers pass by @titaiwangms in https://github.com/microsoft/onnxscript/pull/2160
[pass] Create topological sort pass by @justinchuby in https://github.com/microsoft/onnxscript/pull/2191
[pass] Create check to ensure in-place passes are actually inplace by @justinchuby in https://github.com/microsoft/onnxscript/pull/2192
[IR] Reconcile graph in Node by @justinchuby in https://github.com/microsoft/onnxscript/pull/2183
[IR] Implement model.graphs() by @justinchuby in https://github.com/microsoft/onnxscript/pull/2200
[passes] Move inliner to common passes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2206
[passes] Remove external_data_folder option from FoldConstantsPass by @justinchuby in https://github.com/microsoft/onnxscript/pull/2207
[pass] Implement checker pass and refactor shape inference by @justinchuby in https://github.com/microsoft/onnxscript/pull/2199
[IR][fix] Save value info for initializers by @justinchuby in https://github.com/microsoft/onnxscript/pull/1552
[IR] Allow pass result as pass input by @justinchuby in https://github.com/microsoft/onnxscript/pull/2220
[pass] Create version converter pass by @justinchuby in https://github.com/microsoft/onnxscript/pull/2214
[pass] Remove unused initialized inputs in DCE by @leshabirukov in https://github.com/microsoft/onnxscript/pull/2212

Torch Lib

[torchlib] Precompute the constant for gelu to avoid precision loss by @justinchuby in https://github.com/microsoft/onnxscript/pull/2179
[torchlib] Fix calls to Unsqueeze to provide correct 1d axes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2186
Implement fft torchop by @bmehta001 in https://github.com/microsoft/onnxscript/pull/2141

Documentation

Update onnxscript documentation page by @justinchuby in https://github.com/microsoft/onnxscript/pull/2177

Other Changes

Remove benchmark from tools by @justinchuby in https://github.com/microsoft/onnxscript/pull/2173
Modify constant-folder to return computed symbolic value map by @gramalingam in https://github.com/microsoft/onnxscript/pull/2172
Update ort-nightly version in test by @justinchuby in https://github.com/microsoft/onnxscript/pull/2193
Updated docs for rewrite-patterns by @LuniaKunal in https://github.com/microsoft/onnxscript/pull/2196
Add test for TopologicalSortPass on functions by @justinchuby in https://github.com/microsoft/onnxscript/pull/2198
Update TorchTensor to use ml_dtypes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2201
Update release.yml to change the section for passes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2208
Fix optimizer tests by @justinchuby in https://github.com/microsoft/onnxscript/pull/2217

New Contributors

@LuniaKunal made their first contribution in https://github.com/microsoft/onnxscript/pull/2196
@bmehta001 made their first contribution in https://github.com/microsoft/onnxscript/pull/2141

Full Changelog: https://github.com/microsoft/onnxscript/compare/v0.2.4...v0.2.5

Open source →

0.2.49 Apr 2025

What's Changed

Optimizer and rewriter

Turn inliner into a pass and use it in rewriter & optimizer by @justinchuby in https://github.com/microsoft/onnxscript/pull/2149
Add fusion rules for com.microsoft.Attention by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2148
Allow fuse_xformers to return a count of different fusions applied by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2159
GQA Fusion by @gramalingam in https://github.com/microsoft/onnxscript/pull/2161
Optimization to avoid trying multiple attention-based fusions by @shubhambhokare1 in https://github.com/microsoft/onnxscript/pull/2168
Handle empty rewrite rules in rewrite function by @justinchuby in https://github.com/microsoft/onnxscript/pull/2164

ONNX IR

[IR] Expose the Tape module by @justinchuby in https://github.com/microsoft/onnxscript/pull/2127

Other Changes

Create auto release notes by @justinchuby in https://github.com/microsoft/onnxscript/pull/2170

Full Changelog: https://github.com/microsoft/onnxscript/compare/v0.2.3.1...v0.2.4

Open source →

0.2.23 Mar 2025

Doc script const 1 by @leshabirukov in https://github.com/microsoft/onnxscript/pull/2004

What's Changed

Doc script const 1 by @leshabirukov in https://github.com/microsoft/onnxscript/pull/2004
Create stable apis for torch 2.7 by @justinchuby in https://github.com/microsoft/onnxscript/pull/2063
Fix misleading annotation in the documentation by @xadupre in https://github.com/microsoft/onnxscript/pull/2046
Enable extraction of rewritten subgraph as model-local function by @gramalingam in https://github.com/microsoft/onnxscript/pull/2065
Make onnxscript release 1ES compliant by @jchen351 in https://github.com/microsoft/onnxscript/pull/2071
Add a couple of variants of patterns in ORT fusions by @gramalingam in https://github.com/microsoft/onnxscript/pull/2077
[IR] Fix an error when checking for float8_e4m3fnuz type in ir.Tensor by @justinchuby in https://github.com/microsoft/onnxscript/pull/2078
Squeeze Reshape Identity optimization by @gramalingam in https://github.com/microsoft/onnxscript/pull/2083
add cudnn_enable flag to aten_layer_norm by @yushangdi in https://github.com/microsoft/onnxscript/pull/2085
Extensions to transformer fusions by @gramalingam in https://github.com/microsoft/onnxscript/pull/2082

New Contributors

@leshabirukov made their first contribution in https://github.com/microsoft/onnxscript/pull/2004
@jchen351 made their first contribution in https://github.com/microsoft/onnxscript/pull/2071
@yushangdi made their first contribution in https://github.com/microsoft/onnxscript/pull/2085

Full Changelog: https://github.com/microsoft/onnxscript/compare/v0.2.1...v0.2.2

Open source →