GPT-6.1 Sol
Language modelCard summarizedNear-Astra performance for complex work at a lower cost.
Overview
OpenAI · 03Sol, front
GPT-6.1 Sol
Near-Astra performance for complex work at a lower cost.
- Cost
- $2.00 in
- Context
- 1.05M
- Input / output
- $2.00 / $10.00
- Max output
- 128K
- Knows up to
- April 2026
- Released
- 29 Sep 2026
The first GPT-6.1 model, described as delivering capabilities comparable to GPT-6 Astra with more speed and lower cost. It is treated as Critical in cybersecurity like Astra and uses the same safeguards stack. The addendum updates baseline safety metrics and refers to the Astra card for methods. p.4
gpt-6.1-sol- Input / output per 1M
- $2.00 / $10.00
- Context window
- 1.05M
- Max output
- 128K
- Knows up to
- April 2026
- Reasoning
- Reasoning, always on (effort low → max)
- Weights
- Closed
About this card. A model card is the maker's own account of a model: what it's for, how it was trained and tested, and where it falls short. This page condenses OpenAI's Addendum to GPT-6 Astra System Card: GPT-6.1 Sol. Every claim carries its source page.