Day 0 Support for Claude Sonnet 5.5 on LiteLLM

[misbahsy]

Claude Sonnet 5.5 is now supported on LiteLLM

Call it through the LiteLLM AI Gateway on Anthropic, Bedrock, Gemini Enterprise Agent Platform and Azure, with spend tracking, rate limits, fallbacks and logging in one place.

Same price as Sonnet 5 - $2 / MTok input, $10 output, $0.20 cache reads. Anthropic reports it runs 30%+ faster and costs up to 30% less per task.

Worth checking before you route traffic to it:

Forced tool use returns a 400, so use tool_choice: "auto". thinking: {"type": "disabled"} also returns a 400; Anthropic's replacement is between_tools.

Get started, no redeploy needed:

Pricing landed in PR #43586. Reload your pricing in the UI under Models + Endpoints -> Price Data -> Reload Price Data (or POST /reload/model_cost_map as an admin), on any version v1.76.0 or newer.

model_list:
  - model_name: claude-sonnet-5-5
    litellm_params:
      model: anthropic/claude-sonnet-5-5
      api_key: os.environ/ANTHROPIC_API_KEY

Read the full guide → Day 0 Support: Claude Sonnet 5.5

Misbah Syed
DevRel @ LiteLLM