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GPT-5 nano

OpenAI

GPT-5 nano by OpenAI costs per 1M input tokens and per 1M output tokens, with a -token context window.

Pricing

Input (per 1M tokens)
Output (per 1M tokens)
Cached input (per 1M)

Specifications

Provider
OpenAI
Context window
Parameters
Released
Aug 2025
Open weights
No
Frontier model
No

Benchmarks

LiveBenchreasoning/coding
48.8
SWE-bench Verifiedcoding
34.8
LMArena (Chatbot Arena) Elohuman-preference
1320.2

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FAQ

Pricing is per 1M tokens (USD); confirm with the provider before production use.