{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/gpt-6-sol/","md":"https://postcutoff.com/m/gpt-6-sol/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"gpt-6-sol","name":"GPT-6 Sol","org":"OpenAI","family":"GPT-6","released":"2026-09-22","status":"current","type":"reasoning-llm","modality_in":["text","image"],"modality_out":["text"],"open_weights":false,"model_license":"proprietary","context_window":1050000,"max_output":128000,"knowledge_cutoff":"2026-04","pricing":{"input":2,"cached_input":0.2,"output":10,"cache_write":2.5,"unit":"per 1M tokens (USD), standard tier","source":"https://developers.openai.com/api/docs/pricing"},"price_line":"$2 in, $10 out per 1M tokens","access":[{"provider":"OpenAI API","model_id":"gpt-6-sol","endpoint":"https://api.openai.com/v1/responses","docs":"https://developers.openai.com/api/docs/models/gpt-6-sol"},{"provider":"Azure OpenAI (Microsoft Foundry)","model_id":"gpt-6-sol","docs":"https://learn.microsoft.com/en-us/azure/foundry/foundry-models/concepts/models-sold-directly-by-azure"},{"provider":"OpenRouter","model_id":"openai/gpt-6-sol","url":"https://openrouter.ai/openai/gpt-6-sol"},{"provider":"Web app","url":"https://chatgpt.com"}],"capabilities":[{"name":"Astra-level reliability at lower cost","detail":"OpenAI claims about half as many mistakes as GPT-5.6 Sol at half its API price.","first":false,"discovered":"launch","source":"https://techcrunch.com/2026/09/22/openai-launches-gpt-6-sol-and-luna/"},{"name":"Full hosted tool suite","detail":"Web/file search, image generation, code interpreter, hosted shell, apply patch, skills, computer use, MCP and tool search.","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-6-sol"},{"name":"Image-input bug fix","detail":"Sep 25 2026 fix for an image-encoding bug that degraded image understanding at launch.","first":false,"discovered":"later","source":"https://developers.openai.com/api/docs/changelog"},{"name":"Intelligent UI in ChatGPT (October 2026 update)","detail":"On Oct 7 2026 an October update of this model replaced GPT-5.6 in the ChatGPT Chat tab for Plus, Pro, Business and Enterprise users; it composes answers with native streamable UI components (charts, maps, forms, buttons, calculators, small games) and can start answering while still thinking. The API and Codex/Work keep the September version; the chat-latest snapshot tracks the ChatGPT model.","first":false,"discovered":"later","source":"https://openai.com/index/gpt-6-for-everyone/"}],"entry":null,"notes":"Superseded on Sept 29 2026 by GPT-6.1 Sol (same $2/$10 price, cached input $0.10; see gpt-6-1-sol) but still listed on the pricing page. Mid-tier GPT-6 model for complex coding and agentic workflows; successor to GPT-5.6 Sol. Reasoning effort none..max. OpenRouter also lists openai/gpt-6-sol-pro (reasoning.mode pro). ARC Prize verified (Sept 28 2026) - ARC-AGI-3 4.6% standard harness / 23.0% provider harness, ARC-AGI-2 89.6% at $0.44/task (x.com/arcprize/status/2104671274299429283).","verified":"2026-10-08","body_md":"Default choice for coding agents and complex workflows at moderate cost.\n\n```bash\ncurl https://api.openai.com/v1/responses \\\n -H \"Authorization: Bearer $OPENAI_API_KEY\" -H \"Content-Type: application/json\" \\\n -d '{\"model\":\"gpt-6-sol\",\"input\":\"Hello\"}'\n```\n\nSources:\n- https://developers.openai.com/api/docs/models/gpt-6-sol\n- https://developers.openai.com/api/docs/pricing\n- https://developers.openai.com/api/docs/changelog\n- https://techcrunch.com/2026/09/22/openai-launches-gpt-6-sol-and-luna/\n- Models overview: https://developers.openai.com/api/docs/models","page_url":"https://postcutoff.com/m/gpt-6-sol/","events_after":1863,"major_after":426,"historic_after":83,"missing_at_launch":440,"events_since_release":null,"you_url":"https://postcutoff.com/you/gpt-6-sol/","briefings":{"xs":"https://postcutoff.com/briefings/cutoff-2026-04-xs.md","s":"https://postcutoff.com/briefings/cutoff-2026-04-s.md","m":"https://postcutoff.com/briefings/cutoff-2026-04-m.md","full":"https://postcutoff.com/briefings/cutoff-2026-04.md"}}