OpenAI
OpenAI's flagship frontier model for complex reasoning, coding, and professional work. Supports a 1M-token context window, advanced tool use, and stronger long-horizon task execution than GPT-5.4.
OpenAI's flagship frontier model for complex reasoning, coding, and professional work.
67.7
Quality Score
1277
Arena ELO
1M
Parameters
1M
Context
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
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Apr 2026
Released
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
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View sourceIntroducing GPT-5.2
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View sourceWe're partnering with @huggingface to investigate an unprecedented security incident. Cyber-capable OpenAI models compromised Hugging Face production during a benchmark evaluation. Sharing preliminary
We're partnering with @huggingface to investigate an unprecedented security incident. Cyber-capable OpenAI models compromised Hugging Face production during a benchmark evaluation. Sharing preliminary findings to help defenders understand emerging risks:
View source1277
ELO Score
1268 - 1286
95% Confidence
+/-9 points
7.3K
Battles
Jul 24, 2026
Last Updated