GPT-5.5 Pro
The spec sheet
Figures as the maker publishes them.
Price
- Input, per 1M tokens
- $30
- Output, per 1M tokens
- $180
Memory
- Context window
- 1.05M tokens
- Longest answer
- 128K tokens
Abilities
- Reasoning
- Yes
- Reads images
- Yes
- Calls tools
- Yes
- Takes in
- file, image, text
- Gives back
- text
The model
- Lab
- OpenAI
- Model id
- openai/gpt-5.5-pro
- Released
- 24 Apr 2026
- Open weights
- No
