How to enable 1M context window in Codex
soumitrashukla9 · x · 2026-08-17
Guide on enabling a 1M-token context window in Codex for GPT-5.6 Sol by setting modelcontextwindow = 1000000 in the config file. Note that tokens beyond the default limit count double against usage limits.
Related event: Codex Users Unlock 1M Token Context for GPT-5.6 Sol with a Config Tweak(12 posts)→
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