fix(evaluators): update default judge model to Claude Sonnet 4.6#215
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afarntrog merged 1 commit intostrands-agents:mainfrom May 6, 2026
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Claude Sonnet 4 (us.anthropic.claude-sonnet-4-20250514-v1:0) is now in legacy mode on Amazon Bedrock and will eventually be retired. When that happens, all 10 LLM-based evaluators that rely on the default model would silently fail since Experiment._run_evaluator() catches exceptions and records them as score: 0 results. Update DEFAULT_BEDROCK_MODEL_ID to global.anthropic.claude-sonnet-4-6, matching the default used in the main Strands agents SDK (sdk-python/src/strands/models/bedrock.py). Also update the README example to reference the new model ID. Closes strands-agents#200
poshinchen
approved these changes
May 6, 2026
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Description
Claude Sonnet 4 (us.anthropic.claude-sonnet-4-20250514-v1:0) is now in legacy mode on Amazon Bedrock and will eventually be retired. When that happens, all 10 LLM-based evaluators that rely on the default model would silently fail since Experiment._run_evaluator() catches exceptions and records them as score: 0 results.
Update DEFAULT_BEDROCK_MODEL_ID to global.anthropic.claude-sonnet-4-6, matching the default used in the main Strands agents SDK (sdk-python/src/strands/models/bedrock.py). Also update the README example to reference the new model ID.
Related Issues
Closes #200
Documentation PR
Type of Change
Bug fix
Breaking change
Testing
How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli
hatch run prepareChecklist
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