HighDeprecation
Claude 1M-context beta retired; migrate to Sonnet 4.6 or Opus 4.6
Action Required
Applications relying on the 1M-context beta will fail for requests above 200k tokens unless updated to Claude Sonnet 4.6 or Claude Opus 4.6 with standard pricing.
AI Impact Summary
The 1M-context beta for Claude Sonnet has been retired; requests beyond 200k tokens now error. To continue using a 1M-context window, migrate to Claude Sonnet 4.6 or Claude Opus 4.6, noting standard pricing and removal of the beta header. This affects workloads that ingest long documents or multi-turn dialogues; teams should update model endpoints, verify tokenization, and revalidate downstream processing against the new pricing and behavior.
Claude 1M-context beta retired; migrate to Sonnet 4.6 or Opus 4.6
Affected Systems
Claude Sonnet 4.5
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high