openai/gpt-5-nanoGPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments.
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5 nano lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Graduate-level scientific reasoning
Factual accuracy & hallucination
Novel ML problem-solving
Olympiad-qualifier math
Research-level math problems
Hardest research math
Hardest competition math
Command-line agentic tasks
Model & benchmark data from Epoch AI (CC BY); pricing, specs & descriptions from OpenRouter.