GPT-6 Sol
Language modelPrevious generationCard summarizedBuilt to power complex coding and agentic workflows.
Active (legacy)Source: GPT-6 Astra System Card, Appendix A: GPT-6 Sol, GPT-6 Luna (175 pp)
Use it via API
Where to call it
- OpenAI API
gpt-6-sol
Supports
- Image input
- Streaming
- Structured outputs
- Reasoning control
- Tool calling
- Web search
- Prompt caching
- Batch API
Good for
- Complex coding and agentic workflows
- Lower-cost alternative to GPT-6 Astra
- Fewer factual errors than GPT-5.6 Sol, especially at low reasoning settings
Watch out for
Overview
GPT-6 Sol
Built to power complex coding and agentic workflows.
- Cost
- $2.00 in
- Context
- 1.05M
- Input / output
- $2.00 / $10.00
- Max output
- 128K
- Knows up to
- April 2026
- Released
- 22 Sep 2026
A lower-cost alternative to GPT-6 Astra, covered in an appendix to the Astra system card. OpenAI treats it as High capability in cybersecurity and in biology and chemistry (below Critical), below High in AI self-improvement, and applies the same safeguards as GPT-5.6 Sol and Luna. It is more robust to jailbreaks and prompt injection than GPT-5.6 Sol, while its cyber capability is broadly comparable to GPT-5.6 Sol. p.120, p.123–124, p.144, p.146
gpt-6-sol- Input / output per 1M
- $2.00 / $10.00
- Context window
- 1.05M
- Max output
- 128K
- Knows up to
- April 2026
- Reasoning
- Configurable (effort none → 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 GPT-6 Astra System Card, Appendix A: GPT-6 Sol, GPT-6 Luna. Every claim carries its source page.