Expired50% confidenceFactExact time
OpenAI's o3/o4-mini series reasoning models have a context window of 128K–200K tokens.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Related Claims
UnverifiedThe Codex APP's reasoning levels correspond to the reasoning tokens mechanism in OpenAI's o-series models.73% similarUnverifiedOpenAI的o1系列模型的reasoning tokens对用户不可见70% similarUnverifiedCodex internally calls OpenAI's latest reasoning models (such as o3/o4-mini), which have been specially optimized for code understanding and logical reasoning.70% similarUnverifiedThe limited preview mode continues OpenAI's gradual release strategy used for reasoning models such as o1 and o3.69% similarUnverifiedCodex CLI uses OpenAI's o4-mini model by default, while also supporting switching to other models through configuration.69% similar
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