On Oct 14 OpenAI's API deprecations page announced that GPT-4o (2024-08-06 and 2024-11-20 snapshots), GPT-4o mini (2024-07-18), GPT-4.1 and GPT-4.1 mini (2025-04-14) will be removed from the API on January 14, 2027. Fine-tunes built on them shut down the same day, and the recommended replacement for all four is gpt-6-luna, listed at $0.10 input / $0.50 output per 1M tokens versus $2.50 / $10 for GPT-4o.

Key Takeaways

  • ✓Shutdown: January 14, 2027 (about 3 months' notice) for 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
  • ✓Fine-tuned versions follow the base model's shutdown date; existing customers already lose new fine-tuning jobs on Jan 6, 2027
  • ✓Standard price per 1M tokens (input/output): gpt-6-luna $0.10/$0.50, GPT-4o $2.50/$10, GPT-4.1 $2.00/$8.00, GPT-4.1 mini $0.40/$1.60, GPT-4o mini $0.15/$0.60
  • ✓Monitor programmatically via the shutdown_date field on GET /v1/models
  • ✓Second October deprecation wave: older snapshots such as gpt-4o-2024-05-13 and o4-mini shut down Oct 23; gpt-5.3-codex and gpt-5.1 go on Apr 1, 2027
OpenAI will remove GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini from the API on January 14, 2027, recommending gpt-6-luna
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OpenAI API Deprecations (official)
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In-Depth Technical Analysis

OpenAI's API deprecations page (Oct 14, 2026) lists GPT-4o (gpt-4o-2024-08-06, gpt-4o-2024-11-20), GPT-4o mini (gpt-4o-mini-2024-07-18), GPT-4.1 and GPT-4.1 mini (2025-04-14 snapshots) for removal on January 14, 2027, with gpt-6-luna as the recommended replacement for all of them. Fine-tuned versions follow the same schedule, and existing customers lose the ability to create new fine-tuning jobs on Jan 6, 2027, so teams relying on 4o/4.1 fine-tunes need a retraining plan now. OpenAI publishes no quality comparison between gpt-6-luna and GPT-4o, so run regression evals on real traffic, especially structured outputs and tool calls. On price the move is a large cut: standard rates are $0.10/$0.50 per 1M tokens for gpt-6-luna versus $2.50/$10 for GPT-4o and $2.00/$8.00 for GPT-4.1. Use the shutdown_date field on GET /v1/models to alert on deprecations automatically.

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