Model by OpenAI

GPT-5.4 Mini

GPT-5.4 Mini is OpenAI's smaller GPT-5.4 model, aimed at high-throughput coding and reasoning work where the full model costs too much.

Checked 2026-11-05

GPT-5.4 Mini is OpenAI's smaller GPT-5.4 model, aimed at high-throughput coding and reasoning work where the full model costs too much. OpenAI's model page lists $0.75 per million input tokens, $0.075 per million cached input tokens and $4.50 per million output tokens, a 400,000 token context window, up to 272,000 tokens of input, up to 128,000 tokens of output, and an August 2025 knowledge cutoff. It takes text and image input and returns text only. OpenRouter lists it from 17 March 2026 at the same prices on its cheapest route as listed on 5 November 2026. Regional data residency endpoints add a 10% uplift. The model is not on OpenAI's deprecations page, but the GPT-6 family has since arrived, and its smaller sibling GPT-5.4 Nano is already scheduled for removal, so expect this one to be retired in time. Figures come from OpenAI's model page, its deprecations page and the OpenRouter model list. We have not run it ourselves. We would use it for sub-agent steps and bulk edits, and check GPT-6 Luna before committing to it.

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Questions

What is the context window of GPT-5.4 Mini?

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

How much does GPT-5.4 Mini cost?

$0.75 per million input tokens and $4.5 per million output tokens, checked 31 October 2026.

Can I run GPT-5.4 Mini 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 Mini?

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

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