GPT-5.4 Nano sits in the frontier tier — built for high-capability reasoning, tool use, and long-form output where capability outweighs cost. Available via OpenAI. 400K-token context. Efficient pricing.
GPT-5.4 Nano is a multimodal AI model from OpenAI. It costs $0.200 per million input tokens and $1.250 per million output tokens (blended $0.515/M), with a 400K-token context window.
GPT-5.4 Nano costs $0.200 per million input tokens and $1.250 per million output tokens, for a blended reference rate of $0.515 per million tokens.
GPT-5.4 Nano supports up to 400K tokens of context (400,000 tokens).
GPT-5.4 Nano is well suited to Strong general reasoning, Tool use & function calling and Long-form writing.
GPT-5.4 Nano is developed and served by OpenAI.