{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/gpt-5-3-codex/","md":"https://postcutoff.com/m/gpt-5-3-codex/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-5-3-codex","name":"GPT-5.3-Codex","org":"OpenAI","family":"GPT-5 Codex","released":"2026-02-05","status":"deprecated","type":"code","modality_in":["text","image"],"modality_out":["text"],"open_weights":false,"model_license":"proprietary","context_window":400000,"max_output":128000,"knowledge_cutoff":"2025-08","pricing":{"input":1.75,"cached_input":0.175,"output":14,"unit":"per 1M tokens (USD), standard tier","source":"https://developers.openai.com/api/docs/pricing"},"price_line":"$1.75 in, $14 out per 1M tokens","access":[{"provider":"OpenAI API","model_id":"gpt-5.3-codex","endpoint":"https://api.openai.com/v1/responses","docs":"https://developers.openai.com/api/docs/models/gpt-5.3-codex"},{"provider":"Azure OpenAI (Microsoft Foundry)","model_id":"gpt-5.3-codex","docs":"https://learn.microsoft.com/en-us/azure/foundry/foundry-models/concepts/models-sold-directly-by-azure"},{"provider":"OpenRouter","model_id":"openai/gpt-5.3-codex","url":"https://openrouter.ai/openai/gpt-5.3-codex"},{"provider":"Codex (ChatGPT)","url":"https://chatgpt.com/codex"}],"capabilities":[{"name":"Agentic coding specialist","detail":"Codex-tuned GPT-5.3 for long-running software engineering (Codex app/CLI/IDE and API).","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-5.3-codex"},{"name":"Responses-only","detail":"Available only through the Responses API; effort low/medium/high/xhigh.","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-5.3-codex"}],"entry":null,"notes":"Latest codex-specific API id on the pricing page. Released in Codex Feb 5 2026; API access followed later (Azure version 2026-02-24). GPT-6 Sol is now positioned for coding. Deprecated 2026-10-01 (with gpt-5.1 and gpt-5.4-nano): removal from the API on Apr 1 2027, replacement gpt-6-sol (https://developers.openai.com/api/docs/deprecations).","verified":"2026-10-15","body_md":"```bash\ncurl https://api.openai.com/v1/responses \\\n -H \"Authorization: Bearer $OPENAI_API_KEY\" -H \"Content-Type: application/json\" \\\n -d '{\"model\":\"gpt-5.3-codex\",\"input\":\"Hello\"}'\n```\n\nSources:\n- https://developers.openai.com/api/docs/models/gpt-5.3-codex\n- https://developers.openai.com/api/docs/pricing\n- Models overview: https://developers.openai.com/api/docs/models","page_url":"https://postcutoff.com/m/gpt-5-3-codex/","standing":{"kind":"code","newer_count":5,"newer":[{"id":"recursive-flint","name":"Recursive Flint","org":"Recursive","released":"2026-10-21","page_url":"https://postcutoff.com/m/recursive-flint/"},{"id":"mellum2-1","name":"Mellum2.1 12B-A2.5B Thinking","org":"JetBrains","released":"2026-10-08","page_url":"https://postcutoff.com/m/mellum2-1/"},{"id":"leanstral-1-5","name":"Leanstral 1.5","org":"Mistral AI","released":"2026-07-02","page_url":"https://postcutoff.com/m/leanstral-1-5/"},{"id":"kimi-k2-7-code","name":"Kimi K2.7 Code","org":"Moonshot AI","released":"2026-06","page_url":"https://postcutoff.com/m/kimi-k2-7-code/"},{"id":"grok-build-0-1","name":"Grok Build 0.1","org":"xAI","released":"2026-05","page_url":"https://postcutoff.com/m/grok-build-0-1/"}],"before":null,"after":null,"weights":"closed","licence":"proprietary","licence_permissive":false,"summary":"Closed weights; access is hosted only."}}