{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/gpt-6-luna/","md":"https://postcutoff.com/m/gpt-6-luna/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-luna","name":"GPT-6 Luna","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":"2026-05","pricing":{"input":0.1,"cached_input":0.01,"output":0.5,"cache_write":0.125,"unit":"per 1M tokens (USD), standard tier","source":"https://developers.openai.com/api/docs/pricing"},"price_line":"$0.10 in, $0.50 out per 1M tokens","access":[{"provider":"OpenAI API","model_id":"gpt-6-luna","endpoint":"https://api.openai.com/v1/responses","docs":"https://developers.openai.com/api/docs/models/gpt-6-luna"},{"provider":"Azure OpenAI (Microsoft Foundry)","model_id":"gpt-6-luna","docs":"https://learn.microsoft.com/en-us/azure/foundry/foundry-models/concepts/models-sold-directly-by-azure"},{"provider":"OpenRouter","model_id":"openai/gpt-6-luna","url":"https://openrouter.ai/openai/gpt-6-luna"},{"provider":"Web app","url":"https://chatgpt.com"}],"capabilities":[{"name":"1M context at $0.10/M","detail":"Cheapest OpenAI reasoning model with the full 1.05M context window and 128K output.","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-6-luna"},{"name":"Agentic tools on the budget tier","detail":"Supports computer use, hosted shell, MCP and tool search like the larger models.","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-6-luna"},{"name":"Free-tier ChatGPT model","detail":"Rolled out to ChatGPT free users and the desktop app at launch.","first":false,"discovered":"launch","source":"https://techcrunch.com/2026/09/22/openai-launches-gpt-6-sol-and-luna/"},{"name":"Decisions API model","detail":"Only model behind OpenAI's Decisions API (POST /v1/decisions, public beta since 2026-10-06): typed predicate/choice/score answers from text and images, about 10x faster than the Responses API, billed at $0.10 per 1M input tokens with no output charge.","first":false,"discovered":"later","source":"https://developers.openai.com/api/docs/guides/decisions"},{"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 Free and Go 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":"Most efficient GPT-6 model for focused, high-volume tasks; successor to GPT-5.6 Luna (the mini/nano tier). OpenRouter also lists openai/gpt-6-luna-pro.","verified":"2026-10-08","body_md":"High-volume classification, extraction, routing, sub-agents.\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-luna\",\"input\":\"Hello\"}'\n```\n\nSources:\n- https://developers.openai.com/api/docs/models/gpt-6-luna\n- https://developers.openai.com/api/docs/pricing\n- https://developers.openai.com/api/docs/changelog\n- Models overview: https://developers.openai.com/api/docs/models","page_url":"https://postcutoff.com/m/gpt-6-luna/","events_after":1829,"major_after":419,"historic_after":82,"missing_at_launch":406,"events_since_release":null,"you_url":"https://postcutoff.com/you/gpt-6-luna/","briefings":{"xs":"https://postcutoff.com/briefings/cutoff-2026-05-xs.md","s":"https://postcutoff.com/briefings/cutoff-2026-05-s.md","m":"https://postcutoff.com/briefings/cutoff-2026-05-m.md","full":"https://postcutoff.com/briefings/cutoff-2026-05.md"}}