GPT-5.5
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
The figures
- Made by
- OpenAI
- Model ID
- openai/gpt-5.5
- Input
- $5 per million tokens
- Output
- $30 per million tokens
- Context window
- 1.05M tokens
- Longest answer
- 128K tokens
- Takes in
- file, image, text
- Gives back
- text
- Reasoning
- Yes
- Tool calling
- Yes
- Reads images
- Yes
- Open weights
- No
- Released
- 24 Apr 2026
Read on 3 Oct 2026.