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52817e8c22
Addresses issue where Opus fast model was limited to 200k tokens instead of supporting extended context length. Changes: - Add OPUS_FAST_CONFIGURATION.md with environment variable setup - Add FAST_MODEL_CONFIG.md in migration plugin for fast deployment - Update migration guide to include fast model strings and configuration - Provide VSCode configuration options for fast model usage The fast deployment supports >200k tokens and resolves the error: "prompt is too long: 282789 tokens > 200000 maximum" Configuration: Set ANTHROPIC_DEFAULT_OPUS_MODEL="claude-opus-4-5-20251101-fast"
Claude Opus 4.5 Migration Plugin
Migrate your code and prompts from Sonnet 4.x and Opus 4.1 to Opus 4.5.
Overview
This skill updates your code and prompts to be compatible with Opus 4.5. It automates the migration process, handling model strings, beta headers, and other configuration details. If you run into any issues with Opus 4.5 after migration, you can continue using this skill to adjust your prompts.
Usage
"Migrate my codebase to Opus 4.5"
Learn More
Refer to our prompting guide for best practices on prompting Claude models.
Authors
William Hu (whu@anthropic.com)