OpenAI
OpenAI's most advanced reasoning model. Incorporates significant improvements over GPT-5 in complex multi-step reasoning, coding, and instruction-following.
62.6
Quality Score
1230
Arena ELO
Undisclosed
Parameters
256K
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 2025
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.
gpt-5-2 - SWE-Bench Verified
SWE-Bench Verified resolved rate 72.8
View sourcegpt-5-2-codex - SWE-Bench Verified
SWE-Bench Verified resolved rate 72.8
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-5.2-Codex
Introducing GPT-5.2-Codex | 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 18, 2025 Product Release Company Introducing GPT‑5.2‑Codex The most advanced agentic coding model for professional software engineering and defensive cybersecuri
View sourceIntroducing GPT-5.2
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
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 source1230
ELO Score
1223 - 1237
95% Confidence
+/-7 points
19.1K
Battles
Jul 5, 2026
Last Updated