According to @godofprompt citing @claudeai, Anthropic has made a 1 million token context window generally available for Claude Opus 4.6 and Claude Sonnet 4.6 at standard per-token pricing with no premium multiplier, removing the previous 2x input and 1.5x output surcharge beyond 200K tokens. As reported by @claudeai, a 900K-token request now costs the same per token as a 9K request, enabling entire codebases, long legal contracts, or extended agent sessions to fit in one continuous window. According to @claudeai, Opus 4.6 scores 78.3% on MRCR v2 at 1M tokens, indicating leading long-context recall among frontier models, and Claude Code users on Max, Team, and Enterprise get 1M by default with about 15% fewer compaction events. For enterprises running long-document review, multi-file code analysis, or persistent agent loops, the flat-rate 1M context meaningfully lowers total cost of ownership and reduces retrieval and chunking complexity, according to @godofprompt’s summary of @claudeai’s announcement.

According to @bcherny citing @claudeai on X, Opus 4.6 with a 1 million token context window is now the default Opus model for Claude Code users on Max, Team, and Enterprise plans, while Pro and Sonnet users can opt in via /extra-usage (source: X post by @bcherny linking @claudeai announcement). As reported by Claude on X, the 1M context is generally available for Claude Opus 4.6 and Claude Sonnet 4.6, enabling end-to-end codebase reasoning, large repository refactoring, and multi-file RAG workflows within a single session. According to the X announcement, enterprises can streamline code audits, dependency upgrades, and long-form agentic coding without chunking, reducing context fragmentation and latency from repeated retrieval. For product teams, the upgrade opens opportunities to build developer copilots that index entire monorepos, run long-context test generation, and maintain architectural consistency across services. According to the same source, Pro and Sonnet users can access the 1M window through an /extra-usage opt-in, signaling a usage-based pricing path for high-context workloads.