Opus And Sonnet Enable 1M Token Context
Opus 4.6 and Sonnet 4.6 gain general availability of a 1,000,000-token context window on March 13, 2026, with standard pricing applied across the full window. The pricing policy removes a long-context premium, contrasting with OpenAI and Gemini, which charge surcharges above 272,000 tokens (GPT-5.4) and 200,000 tokens (Gemini 3.1 Pro), respectively.
Key Points
- 1Provide 1M-token context in Opus 4.6 and Sonnet 4.6, available March 13, 2026
- 2Remove long-context premium by applying standard pricing across the full 1M token window
- 3Create competitive pressure as rivals charge surcharges above 200,000 (Gemini 3.1 Pro) or 272,000 (GPT-5.4)
Scoring Rationale
Strong novelty and direct practitioner impact from 1M-context availability, tempered by brief single-source coverage and limited scope details.
Sources
Public references used for this report.
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