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...
The figures
- Made by
- OpenAI
- Model ID
- openai/gpt-5.4
- Input
- $2.5 per million tokens
- Output
- $15 per million tokens
- Context window
- 1.05M tokens
- Longest answer
- 128K tokens
- Takes in
- text, image, file
- Gives back
- text
- Reasoning
- Yes
- Tool calling
- Yes
- Reads images
- Yes
- Open weights
- No
- Released
- 5 Mar 2026
Read on 3 Oct 2026.