{"record":{"id":"e012096bcdb90857","repo":"BerriAI/litellm","slug":"unmapped-reasoning-effort-reasoning-effort-r-m","errorCode":null,"errorMessage":"Unmapped reasoning effort: {reasoning_effort!r}. Must be one of: 'minimal', 'low', 'medium', 'high', 'xhigh', 'max', 'none'.","messagePattern":"Unmapped reasoning effort: (.+?)\\. Must be one of: 'minimal', 'low', 'medium', 'high', 'xhigh', 'max', 'none'\\.","errorType":"http","errorClass":"AnthropicError","httpStatus":400,"severity":"error","filePath":"litellm/llms/anthropic/experimental_pass_through/messages/transformation.py","lineNumber":285,"sourceCode":"        \"\"\"\n        from litellm.exceptions import BadRequestError as _BadRequestError\n        from litellm.llms.anthropic.chat.transformation import (\n            REASONING_EFFORT_TO_OUTPUT_CONFIG_EFFORT,\n            AnthropicConfig,\n        )\n\n        reasoning_effort: Final = optional_params.pop(\"reasoning_effort\", None)\n        if not isinstance(reasoning_effort, str):\n            return\n\n        try:\n            mapped_thinking: Final = AnthropicConfig._map_reasoning_effort(\n                reasoning_effort=reasoning_effort,\n                model=model,\n                custom_llm_provider=custom_llm_provider,\n            )\n        except _BadRequestError as e:\n            raise AnthropicError(message=str(e.message), status_code=400)\n\n        if mapped_thinking is None:\n            optional_params.pop(\"thinking\", None)\n            optional_params.pop(\"output_config\", None)\n            return\n\n        optional_params.setdefault(\"thinking\", mapped_thinking)\n        if AnthropicModelInfo._is_adaptive_thinking_model(model, custom_llm_provider):\n            mapped_effort: Final = REASONING_EFFORT_TO_OUTPUT_CONFIG_EFFORT.get(reasoning_effort)\n            if mapped_effort is None:\n                raise AnthropicError(\n                    message=(\n                        f\"Invalid reasoning_effort: {reasoning_effort!r}. \"\n                        f\"Must be one of: 'minimal', 'low', 'medium', 'high', \"\n                        f\"'xhigh', 'max', 'none'\"\n                    ),\n                    status_code=400,\n                )","sourceCodeStart":267,"sourceCodeEnd":303,"githubUrl":"https://github.com/BerriAI/litellm/blob/77b7c6c40c0c5aa5fbcb1d6a1825ac39ca8829b8/litellm/llms/anthropic/experimental_pass_through/messages/transformation.py#L267-L303","documentation":"Error \"Unmapped reasoning effort: {reasoning_effort!r}. Must be one of: 'minimal', 'low', 'medium', 'high', 'xhigh', 'max', 'none'.\" thrown in BerriAI/litellm.","triggerScenarios":"Thrown at litellm/llms/anthropic/experimental_pass_through/messages/transformation.py:285 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Use one of the listed values for reasoning_effort: 'minimal', 'low', 'medium', 'high', 'xhigh', 'max', 'none'."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"77b7c6c40c0c5aa5fbcb1d6a1825ac39ca8829b8","analyzedAt":"2026-08-18T11:44:31.656Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}