Standard & Paid Price
| Meter | Standard Price | Paid Price | Save |
|---|---|---|---|
| Input price | $2.0000 / 1M tokens | $1.4000 / 1M tokens | -30% |
| Completion price | $10.0000 / 1M tokens | $7.0000 / 1M tokens | -30% |
| Cache read price | $0.2000 / 1M tokens | $0.1400 / 1M tokens | -30% |
| Cache creation price | $2.5000 / 1M tokens | $1.7500 / 1M tokens | -30% |
Description
OpenAI GPT-6 Sol — built for complex coding and agentic workflows. It supports text and image input, a 1,050,000-token context window, up to 128,000 output tokens, and reasoning effort from none to max, with medium as the default. Use /v1/responses for tool calling: on /v1/chat/completions, function calling works only with reasoning_effort set to none. On /v1/responses, send the whole conversation in the input array on every turn; requests that carry previous_response_id or conversation are refused.
Capabilities
- Input modalities
- text, image
- Output modalities
- text
- Tasks
- chat, reasoning, vision, file-video-understanding
Decision evidence
GPT-6 Sol is OpenAI's closed-weight model for complex coding and agentic work, released on 2026-09-22 as a lower-cost alternative to GPT-6 Astra, with a 1,050,000-token context window (922,000 input), 128,000 output tokens and text and image input. Reviewed tests find it faster and cheaper than Astra and Claude Opus 5.5, using about an eighth of Astra's quota in one test; on quality, one $20-plan comparison scored it highest of three, while in two one-prompt builds Opus 5.5 produced the fuller or preferred result.
2026-09-24 · Markdown evidence · JSON data
API endpoints
POST /v1/chat/completions(openai)POST /v1/responses(openai-response)