Claude Opus 4.7 released with API-breaking changes — migrate from Opus 4.6

AI Impact Summary

Claude Opus 4.7 GA introduces API-breaking changes versus Opus 4.6 and includes a tokenizer update along with capability improvements. Teams must review the Migrating to Claude Opus 4.7 guide to adapt request payloads, endpoint usage, and any tokenizer-dependent behavior, as mismatches will cause failures. This requires coordinated upgrade across clients and services, with updated SDKs, potential prompt adjustments, and thorough testing of tokenization and response schemas.