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Anthropic's Claude Sonnet 4.6 context window reportedly expands to 500k tokens

Users of Anthropic's Claude AI have reported an apparent increase in the context window for the Sonnet 4.6 model. One user on a Pro Plan noted their context window expanded from 200,000 to 500,000 tokens. This change was not accompanied by any official announcements or widespread discussion, leading to speculation about whether it is a widespread update or an isolated glitch. AI

IMPACT Potential increase in Claude's ability to process longer documents and conversations.

RANK_REASON User report of a model capability change without official announcement. [lever_c_demoted from research: ic=1 ai=1.0]

Read on r/ClaudeAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic's Claude Sonnet 4.6 context window reportedly expands to 500k tokens

COVERAGE [1]

  1. r/ClaudeAI TIER_2 English(EN) · /u/Slow_Map_7446 ·

    Sonnet 4.6 context went from 200k to 500k?

    <!-- SC_OFF --><div class="md"><p>On a Pro Plan, just saw my context window on Sonnet go up to 500k tokens, but can't find any news abt it or any discussions. Is this for everyone or just a glitch?</p> </div><!-- SC_ON --> &#32; submitted by &#32; <a href="https://www.reddit.com/…