--- id: "2026-10-14-openai-deprecates-gpt-4o-gpt-4-1-api" url: "https://postcutoff.com/e/2026-10-14-openai-deprecates-gpt-4o-gpt-4-1-api/" as_of: "2026-10-15T10:09:00+02:00" date: "2026-10-14" date_precision: day category: product importance: 3 confidence: high status: [Confirmed] sources: 2 editor: human editor human_review: null version: "2026-10-15" --- As of: 2026-10-15 10:09 CEST. Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/ Canonical page: https://postcutoff.com/e/2026-10-14-openai-deprecates-gpt-4o-gpt-4-1-api/ # OpenAI deprecates GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini in the API Full title: OpenAI deprecates GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini in the API: shutdown January 14, 2027, replacement gpt-6-luna On 2026-10-14 OpenAI told developers that the remaining GPT-4-series API models (gpt-4o-2024-08-06, gpt-4o-2024-11-20, gpt-4o-mini-2024-07-18, gpt-4.1-2025-04-14 and gpt-4.1-mini-2025-04-14) will be removed from the API on 2027-01-14, with gpt-6-luna as the recommended replacement. Together with an Oct 1 notice (gpt-5.3-codex, gpt-5.1, gpt-5.4-nano and the tts-1 / gpt-4o-mini-tts voices), it ends the API life of the GPT-4 generation. ## Key facts - Notice date: 2026-10-14; shutdown date: 2027-01-14 (three months' notice) - Models: gpt-4o-2024-08-06, gpt-4o-2024-11-20, gpt-4o-mini-2024-07-18, gpt-4.1-2025-04-14, gpt-4.1-mini-2025-04-14 - Recommended replacement for all five: gpt-6-luna - Fine-tuned versions of these models follow the same shutdown schedule as their base models - Earlier: gpt-4o-2024-05-13 and gpt-4.1-nano were already scheduled for shutdown on 2026-10-23 - Oct 1, 2026 notice: gpt-5.3-codex and gpt-5.1 removed 2027-04-01 (replacement gpt-6-sol), gpt-5.4-nano removed 2027-04-01 (replacement gpt-6-luna) - Oct 1, 2026 notice: tts-1, tts-1-hd, gpt-4o-mini-tts-2025-03-20 and gpt-4o-mini-tts-2025-12-15 removed 2027-01-06 (replacement gpt-realtime-2.1-mini) ## What happened OpenAI's API deprecations page carries a section dated 2026-10-14 ("GPT-4 series model deprecations"): developers using the listed GPT-4o and GPT-4.1 snapshots were notified that the models will be removed from the API on January 14, 2027. For every model the page names `gpt-6-luna`, OpenAI's small, cheap GPT-6 tier, as the replacement. Fine-tuned models built on these bases are shut down on the same date, which matters because GPT-4o and GPT-4.1 were among the last fine-tunable OpenAI chat models. Two weeks earlier, a 2026-10-01 section had scheduled `gpt-5.3-codex`, `gpt-5.1` and `gpt-5.4-nano` for removal on April 1, 2027 (six months' notice) and the older text-to-speech models (`tts-1`, `tts-1-hd` and both `gpt-4o-mini-tts` snapshots) for January 6, 2027, pointing voice users to `gpt-realtime-2.1-mini`. The notice was found on the deprecations page itself (and through the aiweekly.co news list of Oct 15); no OpenAI blog post or press coverage of it had been found as of 2026-10-15. Whether ChatGPT or Azure OpenAI are affected is not stated on the page. ## Why it matters GPT-4o (May 2024) was OpenAI's first natively multimodal "omni" model and the base of its audio/realtime variants; GPT-4.1 (April 2025) was the 1M-token non-reasoning workhorse many production apps still pin. Pointing all of them to gpt-6-luna shows OpenAI consolidating the API on the GPT-6 family, and gives developers with fine-tunes three months to migrate. ## Your AI and this story - GPT-6 Astra (training cutoff April 2026): 167 days after its cutoff - Claude Opus 5.5 (training cutoff June 2026): 106 days after its cutoff - Gemini 4 Argon (training cutoff March 2026): 197 days after its cutoff - Grok 4.7 (training cutoff May 2026): 136 days after its cutoff ## Sources 1. [OpenAI API deprecations page (2026-10-14 and 2026-10-01 sections)](https://developers.openai.com/api/docs/deprecations) (developers.openai.com, docs) 2. [GPT-4o model page](https://developers.openai.com/api/docs/models/gpt-4o) (developers.openai.com, docs) ## Changes - 2026-10-15 (filed): Created ## Related - 2026-09-22: [OpenAI launches GPT-6 Sol and GPT-6 Luna at half the price of GPT-5.6](https://postcutoff.com/e/2026-09-22-gpt-6-sol-luna/index.md) - 2026-07-28: [OpenAI releases GPT-Transcribe and GPT-Live-Transcribe, then deprecates Whisper API](https://postcutoff.com/e/2026-07-28-openai-gpt-transcribe-whisper-deprecation/index.md) - 2024-05-13: [OpenAI launches GPT-4o, a natively multimodal 'omni' model](https://postcutoff.com/e/2024-05-13-gpt-4o/index.md)