GPT-6.1 Sol
By OpenAI
Released: 2026-09-29
GPT-6.1 Sol, launched at OpenAI DevDay on 29 September 2026, is OpenAI's mid-tier workhorse model. OpenAI says it delivers nearly the same intelligence as GPT-6 Astra at one-fifth of Astra's token price: $2 input / $10 output per million tokens with cached input cut to $0.10. It scores 75.2% on DeepSWE v1.1 (high effort) and 71.4% on OSWorld 2.0, has a 1.05M-token context window and 128K max output, and is available in the API plus ChatGPT Work and Codex.
Visit GPT-6.1 SolAI-Powered
Leverages advanced AI technology to deliver cutting-edge capabilities and results.
Fast & Efficient
Optimized performance ensures quick results without compromising on quality.
Purpose-Built
Specifically designed for llms tasks and workflows.
OpenAI Model Timeline
1.05M tokens context
Specifications
AI Evaluation
Near-Astra coding and computer use at a fifth of Astra's price makes GPT-6.1 Sol the default OpenAI model for most API and agent work. Astra still leads on the hardest scientific terminal tasks.
Pros
- Within about 2 points of GPT-6 Astra on coding and computer use
- $2/$10 pricing with cached input halved to $0.10
- 1.05M-token context and five reasoning-effort levels
Cons
- Trails Astra clearly on Terminal-Bench Science (57.0% vs 68.1%)
- Coding-deception rate edged up versus GPT-6 Sol in the system card
- Not available in regular ChatGPT chat at launch
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