4 posts tagged with "anthropic"

LiteLLM now supports Claude Sonnet 4.6 on Day 0. Use it across Anthropic, Azure, Vertex AI, and Bedrock through the LiteLLM AI Gateway.

Date: February 13, 2026 Duration: ~3 hours Severity: High Status: Resolved

Note: This fix will be available starting from v1.81.13-nightly or higher of LiteLLM.

Summary​

Claude Code began sending unsupported Anthropic beta headers to non-Anthropic providers (Bedrock, Azure AI, Vertex AI), causing invalid beta flag errors. LiteLLM was forwarding all beta headers without provider-specific validation. Users experienced request failures when routing Claude Code requests through LiteLLM to these providers.

• LLM calls to Anthropic: No impact.
• LLM calls to Bedrock/Azure/Vertex: Failed with invalid beta flag errors when unsupported headers were present.
• Cost tracking and routing: No impact.

LiteLLM now supports Claude Opus 4.6 on Day 0. Use it across Anthropic, Azure, Vertex AI, and Bedrock through the LiteLLM AI Gateway.

This guide covers Anthropic's latest model (Claude Opus 4.5) and its advanced features now available in LiteLLM: Tool Search, Programmatic Tool Calling, Tool Input Examples, and the Effort Parameter.