Anthropic launched Claude Sonnet 5.5 (claude-sonnet-5-5), available across multiple platforms including the Claude API, Amazon Bedrock, Google Cloud, and Microsoft Foundry. Code written for Claude Sonnet 5 can break in five ways on the new model: to disable up-front thinking developers must now send thinking: {"type": "between_tools"} instead of "disabled" at high effort or below; forced tool use (tool_choice types any and tool) returns a 400 error; thinking blocks are tied to the model and conversation; the computer_20251124 computer use tool is not accepted on the Claude API and Google Clou…
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What to doReview the migration guide and update code that targets Claude Sonnet 5 before using Claude Sonnet 5.5, especially for tool_choice, thinking configuration, computer use tool names, and advisor model…
- Provider
- Anthropic
- Source
- platform.claude.com