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GPT 6.1 Sol Default Context Window Increased to 500k

·2026.10.14 09:00

Key point

The increase from 272k to 500k tokens is available at no extra charge across Codex and ChatGPT Work.

Details

GPT 6.1 Sol now features a default context window of 500k tokens, up from the previous limit of 272k. This change is effective immediately and applies to users of Codex and ChatGPT Work.

The expanded context is expected to reduce the frequency of compactions by 2-3x during long-running tasks. Consequently, this should lead to faster end-to-end task completion for users working with large codebases or extensive documentation.

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