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.
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Quality Score
1350
Arena ELO
Undisclosed
Parameters
200K
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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Dec 2024
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.
o1-2024-12-17 - Arena-Hard-Auto
Arena-Hard-Auto official Gemini-2.5 judged score 55.9 with CI -2.2/1.8
View sourcehttps://huggingface.co/agentica-org/DeepSWE-Preview - SWE-Bench Verified
SWE-Bench Verified resolved rate 58.8
View sourceWe’re introducing GeneBench-Pro, a research-level benchmark for a harder kind of AI progress: how well agents can navigate messy biological data, choose the right analysis path, and make judgment call
We’re introducing GeneBench-Pro, a research-level benchmark for a harder kind of AI progress: how well agents can navigate messy biological data, choose the right analysis path, and make judgment calls that real computational research depends on. https://t.co/AsilnnSxnE
View sourceIntroducing GPT‑5 for developers
Introducing GPT‑5 for developers | 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 August 7, 2025 Product Introducing GPT‑5 for developers The best model for coding and agentic tasks. Loading… Share Introduction Introduction Coding Frontend engin
View sourcehttps://huggingface.co/agentica-org/DeepSWE-Preview - SWE-Bench Verified
SWE-Bench Verified resolved rate 58.8
View sourceo1-2024-12-17 - Arena-Hard-Auto
Arena-Hard-Auto official Gemini-2.5 judged score 55.9 with CI -2.2/1.8
View source1350
ELO Score
1347 - 1354
95% Confidence
+/-4 points
33.2K
Battles
Jul 5, 2026
Last Updated
1193
ELO Score
1182 - 1204
95% Confidence
+/-11 points
3.7K
Battles
Jul 5, 2026
Last Updated