Smartest OpenAI Models

Match · Updated July 2026

The smartest OpenAI model is GPT-5.6 Sol, scoring 58.9 on the Artificial Analysis Intelligence Index. GPT-5.6 Terra (55.0) and GPT-5.5 (54.8) round out the top three.

58.9Intelligence

$5.00Input /M

1.1MContext

The smartest AI models ranked by the Artificial Analysis Intelligence Index — a composite of reasoning, knowledge, math and science benchmarks. These are the most intelligent large language models available today.

Frequently asked

What is the smartest OpenAI model?

The smartest OpenAI model is GPT-5.6 Sol, scoring 58.9 on the Artificial Analysis Intelligence Index. GPT-5.6 Terra (55.0) and GPT-5.5 (54.8) round out the top three.

What's a good alternative to GPT-5.6 Sol?

GPT-5.6 Terra (55.0) is the closest alternative on this metric, followed by GPT-5.5 (54.8). See the full ranking above for the tradeoffs.

How many OpenAI models are there?

modelgrep tracks 70 OpenAI models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by GPT-5.6 Sol. 25 of them qualify for this ranking.

More OpenAI rankings

OpenAI: Best LLMs for Coding OpenAI: Best LLMs for Design & Frontend OpenAI: Fastest LLMs OpenAI: Lowest-Latency LLMs OpenAI: Cheapest LLMs OpenAI: Best Free LLMs OpenAI: Best Reasoning LLMs OpenAI: Best Vision LLMs OpenAI: Best LLMs for Agents OpenAI: Best Open-Source LLMs OpenAI: Longest-Context LLMs OpenAI: Best LLMs for Writing OpenAI: Best LLMs for Math & Science OpenAI: Best LLMs for RAG OpenAI: Best LLMs for SQL & Data Analysis OpenAI: Best LLMs for Roleplay OpenAI: Best Uncensored LLMs

All rankings

Small & Fast LLMs Best Local LLMs Best LLMs for Coding Best LLMs for Design & Frontend Fastest LLMs Lowest-Latency LLMs Cheapest LLMs Best Free LLMs Best Reasoning LLMs Best Vision LLMs Best LLMs for Agents Best Open-Source LLMs Longest-Context LLMs Best LLMs for Writing Best LLMs for Math & Science Best LLMs for RAG Best LLMs for SQL & Data Analysis Best LLMs for Roleplay Best Uncensored LLMs