fix Azure AI Anthropic api-key header and passthrough cost calculation #17656
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Co-authored-by: Erdem Halil <[email protected]>
…re AI Anthropic The passthrough logging for Anthropic was failing when using Azure AI Anthropic because the completion_cost function was not receiving the custom_llm_provider parameter, causing it to fail with "LLM Provider NOT provided" error. This fix: - Retrieves custom_llm_provider from logging_obj.model_call_details - Prepends provider prefix to model name for cost calculation - Passes both formatted model and custom_llm_provider to completion_cost - Centralizes provider prefix logic in _create_anthropic_response_logging_payload This ensures cost calculation works correctly for Azure AI Anthropic requests with models like azure_ai/claude-sonnet-4-5_gb_20250929. Co-authored-by: Erdem Halil <[email protected]>
- Add tests for custom_llm_provider cost calculation in passthrough logging - Add tests for ProviderConfigManager returning AzureAnthropicMessagesConfig - Update existing tests to reflect removal of api-key to x-api-key conversion Co-authored-by: Erdem Halil <[email protected]>
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emilsvennesson
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Dec 9, 2025
BerriAI#17656) * refactor: remove api-key conversion logic for Azure Anthropic Co-authored-by: Erdem Halil <[email protected]> * fix(passthrough): pass custom_llm_provider to completion_cost for Azure AI Anthropic The passthrough logging for Anthropic was failing when using Azure AI Anthropic because the completion_cost function was not receiving the custom_llm_provider parameter, causing it to fail with "LLM Provider NOT provided" error. This fix: - Retrieves custom_llm_provider from logging_obj.model_call_details - Prepends provider prefix to model name for cost calculation - Passes both formatted model and custom_llm_provider to completion_cost - Centralizes provider prefix logic in _create_anthropic_response_logging_payload This ensures cost calculation works correctly for Azure AI Anthropic requests with models like azure_ai/claude-sonnet-4-5_gb_20250929. Co-authored-by: Erdem Halil <[email protected]> * test: add unit tests for Azure AI Anthropic fixes - Add tests for custom_llm_provider cost calculation in passthrough logging - Add tests for ProviderConfigManager returning AzureAnthropicMessagesConfig - Update existing tests to reflect removal of api-key to x-api-key conversion Co-authored-by: Erdem Halil <[email protected]> --------- Co-authored-by: Erdem Halil <[email protected]>
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Title
Fix Azure AI Anthropic api-key header and passthrough cost calculation
Relevant issues
Fixes #17655
Pre-Submission checklist
Please complete all items before asking a LiteLLM maintainer to review your PR
tests/litellm/directory, Adding at least 1 test is a hard requirement - see detailsmake test-unitType
🐛 Bug Fix
Changes
Remove incorrect
api-keytox-api-keyheader conversion for Azure AI Anthropicx-api-keyshould be used, but the Anthropic SDK usesapi-keyFix cost calculation for Azure AI Anthropic passthrough endpoints
custom_llm_providertocompletion_costfunctionAdd
AzureAnthropicMessagesConfigtoProviderConfigManagerAdd unit tests for the above fixes