OpenAI
Previous full o-series reasoning model. Uses extended internal chain-of-thought before responding and remains strong at science and math, but later o3 and o4 releases are the newer frontier generation.
Previous full o-series reasoning model.
44.7
Quality Score
1350
Arena ELO
Undisclosed
Parameters
200K
Context
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0
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0
Likes
Dec 2024
Released
Launches
3
Benchmarks
6
Open Source
1
Research
1
General
5
Recent launch, pricing, benchmark, and API signals linked to this model or its provider.
Now in preview: The ChatGPT desktop app for Linux. Use ChatGPT, ChatGPT Work, and Codex where you already work and build, with your projects and browser workflows on supported Linux systems. https://t.co/OtsPt5N5QC
View sourceArena-Hard-Auto official Gemini-2.5 judged score 55.9 with CI -2.2/1.8
View sourceSWE-Bench Verified resolved rate 58.8
View sourceAs models become more capable, the risks associated with developing and testing them internally also grow. We temporarily paused reinforcement learning (RL) training on our latest models intended for deployment for two weeks while we hardened and red-teamed our research
ChatGPT can now remember your activity across the apps and websites on your computer. With Computer History in the desktop app, future interactions feel more personalized and require less explanation. https://t.co/WHZPxPp31R

Now in preview: The ChatGPT desktop app for Linux. Use ChatGPT, ChatGPT Work, and Codex where you already work and build, with your projects and browser workflows on supported Linux systems. https://t.co/OtsPt5N5QC
o1 is now available through local Ollama runtime. 32K context window listed. An open large reasoning model for real-world solutions by the Alibaba International Digital Commerce Group (AIDC-AI).
Arena-Hard-Auto official Gemini-2.5 judged score 55.9 with CI -2.2/1.8
SWE-Bench Verified resolved rate 58.8
Introducing GPT-5.2 | OpenAI Skip to main content Research Products Business Developers Company Foundation (opens in a new window) Log in Try ChatGPT (opens in a new window) Research Products Business Developers Company Foundation (opens in a new window) Try ChatGPT (opens in a new window) Login OpenAI December 11, 2025 Product Release Introducing GPT‑5.2 The most advanced frontier model for professional work and long-running agents. Loading… Share Model performance Model per
SWE-Bench Verified resolved rate 58.8
Arena-Hard-Auto official Gemini-2.5 judged score 55.9 with CI -2.2/1.8