Model · OpenAI · Text
GPT-6.1 Sol
Near-Astra performance for complex coding, computer use, and professional work at a lower cost than GPT-6 Astra. The GPT-6 generation's frontier workhorse; it supersedes GPT-6 Sol (released 2026-09-22, one week earlier).
- Modality
- Text
- License
- Proprietary (Proprietary)
- Context window
- 1,050,000 tokens 1.05M-token context (922k max input) with 128k max output. Knowledge cutoff 2026-04-30. Standard pricing applies to prompts up to 272k input tokens; above that the whole request costs 2x input and cache rates and 1.5x output. Reasoning effort runs low / medium (default) / high / xhigh / max — no `none` level.
- Released
- September 29, 2026
- Last verified
- October 28, 2026
- Runs locally
- No
- Also handles
- vision, reasoning, code
Strengths
- Near-Astra quality for coding, computer use, and professional work at a fifth of Astra's price ($2 input / $10 output per MTok; $0.10 cached input)
- 1.05M-token context with 128k max output and a 2026-04-30 knowledge cutoff
- Full hosted tool set in the Responses API — web search, file search, image generation, code interpreter, hosted shell, apply patch, skills, computer use, MCP, and tool search
- Multi-agent support in beta; Ultrafast service tier (added 2026-10-08) for lower latency between output tokens
Weaknesses
- Long prompts cost more — over 272k input tokens the whole request is billed at 2x input and 1.5x output
- Tool calling requires the Responses API
- No `none` reasoning effort; no fine-tuning or predicted outputs
- Text and image input only — no audio or video; not available for Realtime, Assistants, embeddings, image generation, speech, or transcription
- Closed weights — API and product only
Try it
| Where | Type | Notes |
|---|---|---|
| OpenAI API | hosted-api | API key required |
Used in solutions
Version history
- GPT-6.1 Terra Oct 2026
- GPT-6.1 Sol Sep 2026 Current
- GPT-6 Luna Sep 2026
- GPT-6 Astra Sep 2026
Official sources
- Model docs docs
- API changelog (release note) announcement
Change log
- — Initial entry. Released 2026-09-29 at $2 input / $10 output per MTok (prompts up to 272k input tokens), with a 1.05M-token context and 128k max output. Supersedes GPT-6 Sol (2026-09-22, never catalogued separately), which no longer appears on OpenAI's models overview.
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