test fix us.anthropic.claude-haiku-4-5-20251001-v1:0

[ishaan-berri]

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• I have Added testing in the tests/test_litellm/ directory, Adding at least 1 test is a hard requirement - see details
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Type

🆕 New Feature
🐛 Bug Fix
🧹 Refactoring
📖 Documentation
🚄 Infrastructure
✅ Test

Changes

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Project	Deployment	Actions	Updated (UTC)
litellm	Ready	Preview, Comment	Apr 1, 2026 5:59pm

[codspeed-hq]

Merging this PR will not alter performance

✅ 16 untouched benchmarks

---

_{Comparing litellm_fix_test_bedrock_model (2ad0f42) with main (c987bdb)}

[greptile-apps]

Greptile Summary

This PR replaces the deprecated Bedrock model us.anthropic.claude-3-5-sonnet-20240620-v1:0 with us.anthropic.claude-haiku-4-5-20251001-v1:0 across 16 test files to unblock CI that was failing due to model unavailability. In addition to the model swap, several test files receive Black formatting cleanup (trailing commas, line-length normalization, whitespace), and .gitignore is improved by deduplicating .mypy_cache/* entries with a broader **/.mypy_cache/ glob.

Key changes:

• Model replacement — all occurrences of the old Sonnet 3.5 cross-region inference profile ID are replaced with the new Haiku 4.5 ID in passthrough, batch, router, health-check, and translation tests
• JSONL fixtures — bedrock_batch_completions.jsonl and input_batch_completions.jsonl updated to use the new model in all 128 request records
• Formatting — test_bedrock_passthrough_transformation.py, test_bedrock_files_transformation.py, and others reformatted to Black style (no logic changes)
• .gitignore fix — duplicate .mypy_cache/* entry removed and pattern broadened to **/.mypy_cache/
• No production code is changed; all changes are confined to the test layer

Confidence Score: 5/5

• Safe to merge — all changes are test-only model string replacements and formatting cleanup with no production code impact.
• Every changed file is a test file, JSONL fixture, or config/gitignore. The model swap is a like-for-like replacement (both are Anthropic cross-region inference profile IDs on Bedrock) in tests that exercise routing/passthrough infrastructure rather than model-specific capabilities, so test coverage is not weakened. No P0 or P1 issues were found.
• No files require special attention.

Important Files Changed

Filename	Overview
tests/local_testing/whitelisted_bedrock_models.txt	Replaces deprecated us.anthropic.claude-3-5-sonnet-20240620-v1:0 with us.anthropic.claude-haiku-4-5-20251001-v1:0 in the whitelist.
tests/proxy_e2e_anthropic_messages_tests/test_config.yaml	Underlying model updated to claude-haiku-4-5; model_name label still reads bedrock-claude-sonnet-3.5 (already flagged in prior review thread).
tests/pass_through_unit_tests/test_anthropic_messages_passthrough.py	Model string replaced from claude-3-5-sonnet to claude-haiku-4-5 in all mock-based passthrough tests; no logic changes.
tests/llm_translation/test_bedrock_completion.py	Model string swapped for passthrough route tests (invoke/converse-stream/invoke-with-response-stream); all assertions still valid with the new model identifier.
tests/test_litellm/test_router.py	Model string replaced in router passthrough and credentials tests; assertions updated to match new model ID in endpoint paths.
tests/test_litellm/llms/bedrock/passthrough/test_bedrock_passthrough_transformation.py	Non-ARN model_id in backward-compatibility test replaced with new model; also Black formatting applied throughout, no logic changes.
tests/batches_tests/test_bedrock_files_and_batches.py	Model string swapped in batch create/retrieve calls; test_async_file_and_batch makes real AWS calls (pre-existing pattern, outside test_litellm/ scope).
.gitignore	Deduplicates duplicate .mypy_cache/* entries and upgrades to **/.mypy_cache/ glob to cover all subdirectory caches.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[PR #24931 - Test Fix] --> B[Model String Replacement]
    A --> C[Code Formatting Cleanup]
    A --> D[.gitignore Fix]

    B --> B1["Old: us.anthropic.claude-3-5-sonnet-20240620-v1:0"]
    B --> B2["New: us.anthropic.claude-haiku-4-5-20251001-v1:0"]

    B2 --> T1[tests/pass_through_unit_tests/]
    B2 --> T2[tests/llm_translation/]
    B2 --> T3[tests/test_litellm/]
    B2 --> T4[tests/batches_tests/]
    B2 --> T5[tests/litellm_utils_tests/]
    B2 --> T6[tests/logging_callback_tests/]
    B2 --> T7[tests/local_testing/whitelisted_bedrock_models.txt]
    B2 --> T8[*.jsonl fixture files]

    C --> C1[Black formatting applied\nno logic changes]
    D --> D1["**.mypy_cache/* x2\n→ **/.mypy_cache/"]

Loading

_{Reviews (3): Last reviewed commit: "ignore mypy cache files" | Re-trigger Greptile}

[greptile-apps]

Stale model_name label after model switch

The model_name is still bedrock-claude-sonnet-3.5 but the underlying model is now bedrock/us.anthropic.claude-haiku-4-5-20251001-v1:0 (Haiku, not Sonnet). Any proxy routes or downstream tests that resolve this config by name will log/display the wrong model family, which could be confusing during debugging.

Consider renaming to match the new model, for example:

Suggested change

	litellm_params:
	model: "bedrock/us.anthropic.claude-3-5-sonnet-20240620-v1:0"
	model: "bedrock/us.anthropic.claude-haiku-4-5-20251001-v1:0"
	aws_region_name: "us-east-1"
	- model_name: bedrock-claude-haiku-4-5
	litellm_params:
	model: "bedrock/us.anthropic.claude-haiku-4-5-20251001-v1:0"
	aws_region_name: "us-east-1"

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ ishaan-jaff
❌ clfhhc
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