OpenAIAnthropicGooglexAIPerplexity
← Back to all updatesPublished ·Anthropic• Minor
Anthropic retired the 1M context beta for Claude Sonnet 4.5 and Claude Sonnet 4.
The read
Old Sonnet long-context calls now error past 200k tokens unless moved to Sonnet 4.6 or Opus 4.6.
The frame
The 1M window moved from beta header on older Sonnet models to generally available access on Sonnet 4.6 and Opus 4.6.
Primary source
Anthropic →Keep reading
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