HighDeprecation
Retirement of 1M-token context window beta for Sonnet 4.5/4 — migrate to Sonnet 4.6 or Opus 4.6
Action Required
Applications relying on 1M-token contexts must migrate to Sonnet 4.6 or Opus 4.6 to avoid errors when submitting large prompts.
AI Impact Summary
The 1M-token context window beta for Sonnet 4.5 and Sonnet 4 has been retired, and requests exceeding 200k tokens will now error. This directly disrupts workloads that rely on ultra-long-context processing, requiring teams to migrate to newer models to preserve functionality. Migration to Sonnet 4.6 or Opus 4.6 uses standard pricing, so teams should plan endpoint changes, cost estimates, and potential re-architecting to ensure seamless large-context inference.
Retirement of 1M-token context window beta for Sonnet 4.5/4 — migrate to Sonnet 4.6 or Opus 4.6
Affected Systems
Sonnet 4.5
- Date
- Date not specified
- Change type
- deprecation
- Severity
- high