Free OpenAI Models
Match · Updated July 2026
The most capable free OpenAI model is gpt-oss-20b (free), scoring 14.9 on the Intelligence Index at no per-token cost via OpenRouter.
14.9Intelligence
FreeInput /M
131KContext
The best large language models with a free tier, ranked by intelligence. Capable free AI models you can use at no per-token cost via OpenRouter.
Frequently asked
Is there a free OpenAI model?
The most capable free OpenAI model is gpt-oss-20b (free), scoring 14.9 on the Intelligence Index at no per-token cost via OpenRouter.
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. 1 of them qualify for this ranking.
More OpenAI rankings
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All rankings
Small & Fast LLMsBest Local LLMsSmartest LLMsBest LLMs for CodingBest LLMs for Design & FrontendFastest LLMsLowest-Latency LLMsCheapest LLMsBest Reasoning LLMsBest Vision LLMsBest LLMs for AgentsBest Open-Source LLMsLongest-Context LLMsBest LLMs for WritingBest LLMs for Math & ScienceBest LLMs for RAGBest LLMs for SQL & Data AnalysisBest LLMs for RoleplayBest Uncensored LLMs