OpenAI Codex now supports 1M token context window
Moh1tAgarwal · x · 2026-08-17
OpenAI Codex now supports a 1 million token context window. Developers can enable this by updating the /.codex/config.toml file with specific settings for model, context window size, and auto-compaction limit. This feature requires a compatible model like GPT-5.6 Sol and allows retaining significantly more code and conversation history.
Related event: OpenAI Codex Supports 1M Token Context via Config Tweak(3 posts)→
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