{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/gpt-5-6-terra/","md":"https://postcutoff.com/m/gpt-5-6-terra/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-5-6-terra","name":"GPT-5.6 Terra","org":"OpenAI","family":"GPT-5.6","released":"2026-07-09","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":"2026-02","pricing":{"input":2,"cached_input":0.2,"output":12,"unit_note":"prompts >272K input tokens billed 2x input / 1.5x output","unit":"per 1M tokens (USD), standard tier","source":"https://developers.openai.com/api/docs/pricing"},"price_line":"$2 in, $12 out per 1M tokens","access":[{"provider":"OpenAI API","model_id":"gpt-5.6-terra","endpoint":"https://api.openai.com/v1/responses","docs":"https://developers.openai.com/api/docs/models/gpt-5.6-terra"},{"provider":"Azure OpenAI (Microsoft Foundry)","model_id":"gpt-5.6-terra","docs":"https://learn.microsoft.com/en-us/azure/foundry/foundry-models/concepts/models-sold-directly-by-azure"},{"provider":"OpenRouter","model_id":"openai/gpt-5.6-terra","url":"https://openrouter.ai/openai/gpt-5.6-terra"},{"provider":"Web app","url":"https://chatgpt.com"}],"capabilities":[{"name":"Balanced tier","detail":"Mid tier at $2/$12 per 1M, well below GPT-5.5 ($5/$30), with max reasoning effort.","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/pricing"},{"name":"Official migration target","detail":"Named replacement for many deprecated legacy snapshots (gpt-3.5, gpt-4 variants, o-series).","first":false,"discovered":"later","source":"https://developers.openai.com/api/docs/deprecations"}],"entry":null,"notes":"Balanced GPT-5.6 model. Succeeded on 2026-10-26 by gpt-6-1-terra ($1/$5, half the price; see 2026-10-26-gpt-6-1-terra); no deprecation date announced as of that day. Single snapshot gpt-5.6-terra.","verified":"2026-09-29","body_md":"Everyday work at mid-range 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-5.6-terra\",\"input\":\"Hello\"}'\n```\n\nSources:\n- https://developers.openai.com/api/docs/models/gpt-5.6-terra\n- https://developers.openai.com/api/docs/pricing\n- https://developers.openai.com/api/docs/deprecations\n- Models overview: https://developers.openai.com/api/docs/models","page_url":"https://postcutoff.com/m/gpt-5-6-terra/","events_after":1919,"major_after":439,"historic_after":85,"missing_at_launch":138,"events_since_release":null,"you_url":"https://postcutoff.com/you/gpt-5-6-terra/","briefings":{"xs":"https://postcutoff.com/briefings/cutoff-2026-02-xs.md","s":"https://postcutoff.com/briefings/cutoff-2026-02-s.md","m":"https://postcutoff.com/briefings/cutoff-2026-02-m.md","full":"https://postcutoff.com/briefings/cutoff-2026-02.md"}}