HighDeprecation
Anthropic Claude: 1M-token context beta retired for Sonnet 4.5/4; migrate to Sonnet 4.6 or Opus 4.6
Action Required
Applications relying on 1M-context processing via Claude Sonnet 4.5/4 will fail for requests >200k tokens unless migrated to Sonnet 4.6 or Opus 4.6.
AI Impact Summary
Anthropic has retired the 1M-token context beta for Claude Sonnet 4.5/4, causing requests exceeding ~200k tokens to fail. Applications relying on long-context processing must upgrade to Claude Sonnet 4.6 or Claude Opus 4.6 to preserve 1M context; plan migration of client libraries, feature flags, and any document batching or chunking logic. Expect a period of compatibility testing and potential re-tuning of prompts to account for minor model version differences.
Anthropic Claude: 1M-token context beta retired for Sonnet 4.5/4; migrate to Sonnet 4.6 or Opus 4.6
Affected Systems
Claude Sonnet 4.5
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high