OpenAI
LLM
Medium
Closed weights
GPT-6.1 Sol
44 days since OpenAI announced it ·
GPT-6.1 Sol is a closed-weights LLM from OpenAI, announced 29 Sep 2026. It costs $2 per 1M input tokens and $10 per 1M output tokens. Its context window is 1.05M tokens.
- Input
- $2
- per 1M tokens
- Cache write
- $2.50
- per 1M tokens
- Cache read
- $0.10
- per 1M tokens
- Output
- $10
- per 1M tokens
- Context window
- 1.05M
- tokens
- Parameters
- —
- not disclosed
- Announcement
- openai.com/index/introducing-gpt-6-1-sol
- Docs
- developers.openai.com/api/docs/models/gpt-6.1-sol
Our coverage
2 storiesOpenAI · Medium
closed weightsA new one every ~75 days — due in ~58d.
- GPT-6.1 Terra +27d
- GPT-6.1 Sol +7d
- GPT-6 Sol +75d
- GPT-5.6 Terra +0d
- GPT-5.6 Sol +114d
- GPT-5.4 mini +222d
- GPT-5 mini
More from OpenAI
All models- GPT-6 Cyber
- GPT-Image-2.6 Flare
- GPT-Image-2.6 Sunburst
- GPT-6 Rosalind
- GPT-6 Luna
- GPT Image 2.5 Flare
- GPT Image 2.5 Sunburst
- GPT-6 Astra
Tools that picked it up
- ChatGPT same day
- Codex 0.159.1 same day
- Copilot 1.0.90 +1d
Facts last updated , from OpenAI’s own pages.