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OpenAI: GPT-5.4

GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for...

Developer
openai
Input modalities
text, image, file
Output modalities
text
Context tokens
1,050,000
Latest price observation
2026-09-28
Lowest paired standard token quote
$2.50 input / $15.00 output per 1M tokens

Dated price and provider records

Provider and channelInputOutput or native rateUnit and statusSource and observation
Automatic routingopenrouter$2.50$15.001M tokenspriced · USDopenrouter2026-09-28

These are dated, non-executable observations. Verify the exact endpoint, price and terms with the source before use. Unknown values are not free.