Upgrading to Claude Sonnet 5 for Enhanced Context and Efficiency
Leverage introductory pricing and 1M context by migrating to Sonnet 5.
Switch your API integrations to 'claude-sonnet-5' to access the latest model features including a 1M token context window and 128k output tokens at a discounted rate.
The Scenario
You are looking to upgrade your application to the latest version of Claude to take advantage of the 1M token context window and faster reasoning. You need to know the specific model ID and introductory pricing details.
Before & after
Users would manually scan long documentation or wait for community announcements to find the latest model IDs and pricing changes, taking 30 or more minutes.
Check the release notes for the 'claude-sonnet-5' identifier and the current token pricing. You can update your API calls to the new model in under 5 minutes.
The Prompt
Summarize the technical changes required to migrate an app from Claude Sonnet 4.6 to Claude Sonnet 5 based on the June 30, 2026 release notes.
Claude Sonnet 5 offers a 1M token context window and adaptive thinking by default. Note that manual extended thinking is now deprecated and will return errors if not removed from your API calls.
Source
Claude Platform - Claude Platform Docs"We've launched Claude Sonnet 5 (claude-sonnet-5)... at introductory pricing of $2 / $10 per MTok through August 31, 2026."