GPT-5.4
language modelOpenAI
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...
Key facts
| Made by | OpenAI |
|---|---|
| Type | language model |
| Released | March 5, 2026 |
| Reads at once | 1,050,000 tokens |
| Price (API, per million tokens) | $2.5 in · $15 out |
| Input → output | text, image, file → text |
Questions about GPT-5.4
Who makes GPT-5.4?
GPT-5.4 is made by OpenAI.
When was GPT-5.4 released?
We first saw GPT-5.4 listed on March 5, 2026.
How much does GPT-5.4 cost?
Through OpenRouter it costs $2.5 per million input tokens and $15 per million output tokens. Prices change, so check the provider before you build on it.
How much text can GPT-5.4 read at once?
Up to 1,050,000 tokens, roughly 787.5K words.
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