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OpenAI reasoning model trained with reinforcement learning to perform complex reasoning tasks. Designed to think deeply before responding.

Upcoming Retirement

This model will be retired on October 22, 2026. Consider migrating to a newer model before this date.

Context Window
200K
tokens
Max Output
16,384
tokens

Supported File Formats

Images

WEBP(20 MB)PNG(20 MB)JPEG(20 MB)GIF(20 MB)

Documents

textdocxlsrtfdocxxlsx