openai/gpt-5-nanoGPT-5 nano is OpenAI’s proprietary AI model, released Aug 7, 2025. It scores 139 on the Epoch Capabilities Index, costs $0.05/M input and $0.40/M output tokens, and handles a 400K-token context window.
GPT-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
Frontier of human expert knowledge
Broad expert knowledge
Factual accuracy & hallucination
Novel ML problem-solving
Contamination-free coding
Scientific research coding
Olympiad-qualifier math
Research-level math problems
Hardest research math
Hardest competition math
Command-line agentic tasks
Tool-agent-user reliability
GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments.
GPT-5 nano is an AI model developed by OpenAI, part of the GPT family, released Aug 7, 2025.
GPT-5 nano's list price from OpenAI is $0.05 per million input tokens and $0.40 per million output tokens.
GPT-5 nano supports a context window of up to 400K tokens.
On standardized evaluations tracked by Epoch AI, GPT-5 nano scores 95.2% on MATH Level 5, 78.9% on LiveCodeBench, 2.1% on FrontierMath Tier 4.
GPT-5 nano is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Oct 19, 2026.