[Fix] Update CUTLASS_REVISION to v4.3.5

[pacoxu]

Purpose

https://github.com/NVIDIA/cutlass?tab=readme-ov-file#whats-new-in-cutlass-43
https://docs.nvidia.com/cutlass/latest/CHANGELOG.html

cutlass 4.3.5 vs 4.2.1, it includes many Blackwell SM100/SM103/SM120/SM130 support feature/bugfix.

• add initial Blackwell support #12702 is a old PR to update cutlass(the PR updated it to 3.8) and CUDA_SUPPORTED_ARCHS( cuda arches has been already updated in main now). add initial Blackwell support #12702 is out-of-dated and should be closed.

Probably this may benefit PRs like

• [Fix][MoE] Add SM120 support for FP8 MoE path #32237
• a follow up is Sm120 130 #32917

Test Plan

Test Result

---

Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.
• (Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

[gemini-code-assist]

Code Review

This pull request updates the CUTLASS dependency from v4.2.1 to v4.3.5 to incorporate support for Blackwell architectures. The modification in CMakeLists.txt is straightforward and correct. However, given that this is a significant dependency update, it has the potential to impact various parts of the system, including kernel generation scripts and other components that rely on CUTLASS. The pull request description currently lacks a test plan and corresponding results. For a change of this nature, it is critical to provide detailed information about the testing performed to validate that the new version does not introduce any regressions and that the intended new functionalities work as expected. Please update the pull request to include a comprehensive test plan and its outcomes.

[mgoin]

Let's see if this breaks anything

[pacoxu]

[2026-01-29T06:14:49Z]         # Verify the response reflects the pirate personality
[2026-01-29T06:14:49Z]         output_text = response.output_text.lower()
[2026-01-29T06:14:49Z]         pirate_indicators = ["arrr", "matey", "ahoy", "ye", "sea"]
[2026-01-29T06:14:49Z]         has_pirate_language = any(
[2026-01-29T06:14:49Z]             indicator in output_text for indicator in pirate_indicators
[2026-01-29T06:14:49Z]         )
[2026-01-29T06:14:49Z] >       assert has_pirate_language, (
[2026-01-29T06:14:49Z]             f"Expected pirate language in response, got: {response.output_text}"
[2026-01-29T06:14:49Z]         )
[2026-01-29T06:14:49Z] E       AssertionError: Expected pirate language in response, got: I’m doing well, thanks for asking! How can I help you today?
[2026-01-29T06:14:49Z] E       assert False
[2026-01-29T06:14:49Z]
[2026-01-29T06:14:49Z] entrypoints/openai/responses/test_harmony.py:1268: AssertionError
[2026-01-29T06:14:49Z] =============================== warnings summary ===============================
[2026-01-29T06:14:49Z] <frozen importlib._bootstrap>:488
[2026-01-29T06:14:49Z]   <frozen importlib._bootstrap>:488: DeprecationWarning: builtin type SwigPyPacked has no __module__ attribute
[2026-01-29T06:14:49Z]
[2026-01-29T06:14:49Z] <frozen importlib._bootstrap>:488
[2026-01-29T06:14:49Z]   <frozen importlib._bootstrap>:488: DeprecationWarning: builtin type SwigPyObject has no __module__ attribute
[2026-01-29T06:14:49Z]
[2026-01-29T06:14:49Z] ../../usr/local/lib/python3.12/dist-packages/schemathesis/generation/coverage.py:305
[2026-01-29T06:14:49Z]   /usr/local/lib/python3.12/dist-packages/schemathesis/generation/coverage.py:305: DeprecationWarning: jsonschema.exceptions.RefResolutionError is deprecated as of version 4.18.0. If you wish to catch potential reference resolution errors, directly catch referencing.exceptions.Unresolvable.
[2026-01-29T06:14:49Z]     ref_error: type[Exception] = jsonschema.RefResolutionError,
[2026-01-29T06:14:49Z]
[2026-01-29T06:14:49Z] -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
[2026-01-29T06:14:49Z] =========================== short test summary info ============================
[2026-01-29T06:14:49Z] FAILED entrypoints/openai/responses/test_harmony.py::test_system_prompt_override[openai/gpt-oss-20b] - AssertionError: Expected pirate language in response, got: I’m doing well, thanks for asking! How can I help you today?
[2026-01-29T06:14:49Z] assert False
[2026-01-29T06:14:49Z] !!!!!!!!!!!!!!!!!!!!!!!!!! stopping after 1 failures !!!!!!!!!!!!!!!!!!!!!!!!!!!
[2026-01-29T06:14:49Z] ======= 1 failed, 45 passed, 1 skipped, 3 warnings in 263.45s (0:04:23) ========
[2026-01-29T06:14:52Z] 🚨 Error: The command exited with status 1
[2026-01-29T06:14:52Z] user command error: The plugin docker command hook exited with status 1

CI failed for test_harmony.py::test_system_prompt_override.

I rebased with latest main branch.

After re-run, this is passed.

[mergify]

This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @pacoxu.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[mergify]

This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @pacoxu.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[pacoxu]

https://github.com/NVIDIA/cutlass/releases/tag/v4.4.1 is released!