Model by OpenAI

GPT-5.4 Nano

GPT-5.4 Nano was OpenAI's cheapest GPT-5.4 model, built for speed-critical, high-volume jobs, and it is now deprecated.

Checked 2026-11-05

GPT-5.4 Nano was OpenAI's cheapest GPT-5.4 model, built for speed-critical, high-volume jobs, and it is now deprecated. OpenAI's deprecations page announced the change on 1 October 2026, with removal from the API on 1 April 2027 and gpt-6-luna as the suggested replacement. The model page still lists $0.20 per million input tokens, $0.02 per million cached input tokens and $1.25 per million output tokens, a 400,000 token context window, 272,000 tokens of input, 128,000 of output, and an August 2025 knowledge cutoff, with text and image input and text output. OpenRouter lists it from 17 March 2026 at the same input and output prices on its cheapest route as listed on 5 November 2026. Regional processing endpoints add 10%. Figures come from OpenAI's model and deprecations pages and the OpenRouter model list. We have not run it ourselves. We would not build anything new on it. If you have a pipeline using it for tagging or routing, test GPT-6 Luna against the same inputs and move before the April 2027 shutdown.

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Questions

What is the context window of GPT-5.4 Nano?

400,000 tokens, with up to 128,000 tokens of output.

How much does GPT-5.4 Nano cost?

$0.2 per million input tokens and $1.25 per million output tokens, checked 31 October 2026.

Can I run GPT-5.4 Nano on my own hardware?

No. The weights are not published, so you use it through the maker's API or a hosting provider.

Who makes GPT-5.4 Nano?

OpenAI makes it, and released it on 17 March 2026.

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