HighDeprecation
Claude Sonnet 4.x 1M-token context beta retired — migrate to Sonnet 4.6 or Opus 4.6
Action Required
Applications using the 1M-token context beta will fail for inputs above 200k tokens unless migrated to Claude Sonnet 4.6 or Claude Opus 4.6.
AI Impact Summary
Claude Sonnet 4.x 1M-token context beta has been retired; requests exceeding 200k tokens now error. Customers handling long documents or multi-turn prompts must migrate to Claude Sonnet 4.6 or Claude Opus 4.6, which are GA and priced under standard terms with no beta header. Plan to adjust prompts, implement token-splitting, or re-architect workflows to stay within the 200k limit while preserving context continuity.
Claude Sonnet 4.x 1M-token context beta retired — migrate to Sonnet 4.6 or Opus 4.6
Affected Systems
Claude Sonnet 4.x
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high