o1 Preview
RetiredAn OpenAI model with a 128K-token context window. Released on the OpenAI API September 12, 2024, now retired.
Access details: OpenAI API
An alias. The provider can point it at a newer version.
o1-previewUpdated Sep 23, 2026
Capabilities & limits
- Context window
- 128K
- Maximum output
- 32K
- Image input
- Unsupported
- Tool calling
- —
- Structured output
- Supported
Pricing
USD / 1M tokens- Input
- No longer sold
- Output
- No longer sold
No longer sold on the OpenAI API.
Price history
Jul 28, 2025
Input No longer sold per million tokens
Jul 28, 2025
Output No longer sold per million tokens
Technical details
- Parameters
- Not published
- Active parameters
- Not published
- Architecture
- Not published
- Training / knowledge cutoff
- Oct 01, 2023
- Input modalities
- Text
- Output modalities
- Text
From OpenAI
Official announcement ↗Release & lifecycle
- First available
- Sep 12, 2024
- deprecated
- As of Sep 13, 2026
- retired
- As of Sep 23, 2026