Per OpenAI's official Deprecations page, a batch of legacy snapshots deprecated on Apr 22 stops serving in the API on Oct 23, 2026: 12 snapshots and their aliases including gpt-3.5-turbo-0125, gpt-4-0613, gpt-4-turbo, gpt-4.1-nano, gpt-4o-2024-05-13, gpt-image-1, o1, o1-pro, o3-mini and o4-mini, plus five fine-tuned model families. Official substitutes are gpt-5.6-sol/terra/luna and gpt-image-2.5. The #keep4o campaign to preserve GPT-4o snapshots resurfaced on X today.

Key Takeaways

  • ✓12 snapshots plus aliases go dark together: o4-mini, o3-mini, o1, o1-pro, gpt-4-turbo, gpt-4, gpt-3.5-turbo aliases stop resolving (OpenAI Deprecations)
  • ✓Shutdown date Oct 23, 2026 — 12 days away; announced Apr 22, meeting OpenAI's 6-month minimum for GA models
  • ✓Substitutes: o4-mini / gpt-3.5 → gpt-5.6-terra; gpt-4 family / o1 / o3-mini / gpt-4o-2024-05-13 → gpt-5.6-sol; o1-pro → gpt-5.6-sol with reasoning.mode: pro; gpt-4.1-nano → gpt-5.6-luna
  • ✓gpt-image-1 → gpt-image-2.5-sunburst or -flare; five fine-tuned families (ft-gpt-4, ft-gpt-3.5-turbo, ft-o4-mini, etc.) also shut down and must be retrained on new bases
  • ✓Next wave: Dec 1 (gpt-image-1.5 / 1-mini) and Dec 11 (first-gen gpt-5 snapshots, o3, o3-pro)
⚡

Key Decision Metrics at a Glance

TL;DR Verdict
🏆 Benchmark RankRank
See how it ranks on the leaderboard
Full Leaderboard→
💰 Cost & PlansCompare
in: $1.1 / out: $4.4
Compare Plans↗
🛠️ Ecosystem & IDERules
OpenAI · API · o4-mini
Setup IDE Rules↗
🧭

Turn your technical choice into a development budget

Compare 40 dev plans & simulate token costs vs $20/mo subscriptions

⚔️ Compare Model→💰 Compare plans & limits↗
🔗

Project Links & Resources

Direct Access
Direct access to official project resources and documentation
📖
OpenAI API Deprecations (official)
developers.openai.com/api/docs/deprecations
↗
📝
OpenAI Community: upcoming model shutdowns in 2026
community.openai.com/t/deprecation-notice-upcoming-model-shutdowns-in-2026/1379553
↗
📖
OpenAI API pricing
developers.openai.com/api/docs/pricing
↗
🔬

In-Depth Technical Analysis

OpenAI's Deprecations page confirms that the batch of legacy snapshots announced on Apr 22, 2026 stops serving in the API on Oct 23, 2026. Affected: gpt-3.5-turbo-0125, gpt-4-0613, gpt-4-1106-preview, gpt-4-turbo, gpt-4.1-nano, gpt-4o-2024-05-13, gpt-image-1, o1-2024-12-17, o1-pro-2025-03-19, o3-mini-2025-01-31, o4-mini-2025-04-16 and ft-o4-mini, plus their aliases (o1, o1-pro, o3-mini, o4-mini, gpt-4, gpt-3.5-turbo), and fine-tuned ft-gpt-3.5-turbo, ft-gpt-4, ft-gpt-4.1-nano, ft-babbage-002 and ft-davinci-002. Substitutes: gpt-5.6-sol (gpt-4 family, o1, o3-mini, gpt-4o; o1-pro via reasoning.mode: pro), gpt-5.6-terra (o4-mini, gpt-3.5), gpt-5.6-luna (gpt-4.1-nano), and gpt-image-2.5-sunburst/flare for gpt-image-1. OpenAI published no head-to-head benchmarks or price comparisons in the notice, so replay your own production samples before switching. Grep code, env vars and prompt-management configs for these IDs, retrain fine-tunes on new bases, and plan for the next waves on Dec 1 (gpt-image-1.5/1-mini) and Dec 11 (first-gen gpt-5 snapshots, o3, o3-pro). The #keep4o campaign asking OpenAI to preserve GPT-4o snapshots trended on X today, but the official shutdown date is unchanged.

Action HubReady to adopt this in production?

Benchmark side-by-side against alternatives, or calculate monthly token cost vs subscription break-even.

⚔️ Launch VS Compare→💳 View Plans↗