[Docs] Add OLMo 2 to batch-invariance tested models

[seanwestfall]

Summary

Add allenai/OLMo-2-0425-1B-Instruct to the models explicitly
validated for batch-invariant inference.

Refs #27433.

Duplicate-work check

I reviewed issue #27433 and searched existing open pull requests for this
model. I found no PR validating allenai/OLMo-2-0425-1B-Instruct.

Validation

Hardware:

• NVIDIA L4, compute capability 8.9, 23,034 MiB
• Driver 580.178.04
• PyTorch 2.13.0+cu130
• vLLM 0.28.1rc1.dev475+g6fbb00b18
• vLLM commit: 6fbb00b
• Model revision: 48d788eca847d4d7548f375ad03d3c9312f6139e

Command:

VLLM_ALLOW_LONG_MAX_MODEL_LEN=1 \
VLLM_TEST_MODEL=allenai/OLMo-2-0425-1B-Instruct \
.venv/bin/python -m pytest \
  tests/v1/determinism/test_batch_invariance.py -v -s --tb=short

Result:

19 passed, 35 warnings in 989.00s (0:16:29)

HuggingFace Job:

https://huggingface.co/jobs/alphonse86/6a9e6aa1e686246ca69a778b

[claude]

Claude Code Review

This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

[mergify]

Documentation preview: https://vllm--55691.org.readthedocs.build/en/55691/

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

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📥 Commits

Reviewing files that changed from the base of the PR and between 392db56 and f3e819b.

📒 Files selected for processing (1)

• docs/features/batch_invariance.md

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📝 Summary

Summary by CodeRabbit

• Documentation
  • Added OLMo 2 (allenai/OLMo-2-0425-1B-Instruct) to the list of models validated for consistent results across batch sizes.

Walkthrough

The batch invariance documentation now lists allenai/OLMo-2-0425-1B-Instruct among the validated OLMo 2 models.

Changes

Batch invariance validation

Layer / File(s)	Summary
Add OLMo 2 model listing docs/features/batch_invariance.md	Adds allenai/OLMo-2-0425-1B-Instruct to the tested OLMo 2 models.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to f3e81

This change documents successful batch-invariance validation for the OLMo 2 instruct checkpoint and introduces no runtime behavior changes or remaining merge-readiness risk.

Suggested reviewers: tzielinski-habana, machero, cogniera

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely identifies the main documentation change: adding OLMo 2 to the batch-invariance tested models.
Description check	✅ Passed	The description directly explains the model addition and provides relevant validation details for the batch-invariance test suite.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

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✅ Triggered Buildkite CI #87528 for commit f3e819ba6154.

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