# AI models retired or deprecated in September 2026

Published 2026-10-01 · covers September 2026

50 models have a retirement date inside the next four months as of September 2026. Each row is sourced from the provider’s own deprecation notice. Which AI models are being retired? Provider Model Shutdown Replacement OpenAI gpt-5.4-cyber 2026-10-01 The most capable cyber model available to you. Anthropic claude-haiku-4-5-20251001 2026-10-15 — OpenAI gpt-3.5-turbo-0125 2026-10-23 gpt-5.6-terra OpenAI gpt-4-0613 2026-10-23 gpt-5.6-sol OpenAI gpt-4-turbo 2026-10-23 gpt-5.6-sol OpenAI gpt-4.1-nano 2026-10-23 gpt-5.6-luna OpenAI gpt-4o-2024-05-13 2026-10-23 gpt-5.6-sol OpenAI gpt-image-1 2026-10-23 gpt-image-2.5-sunburst or gpt-image-2.5-flare OpenAI o1-2024-12-17 2026-10-23 gpt-5.6-sol OpenAI o1-pro-2025-03-19 2026-10-23 gpt-5.6-sol (reasoning.mode: pro) OpenAI o3-mini-2025-01-31 2026-10-23 gpt-5.6-sol OpenAI ft-o4-mini-2025-04-16 2026-10-23 gpt-5.6-terra OpenAI o4-mini-2025-04-16 2026-10-23 gpt-5.6-terra OpenAI ft-gpt-3.5-turbo 2026-10-23 gpt-5.6-terra OpenAI ft-gpt-4 2026-10-23 gpt-5.6-sol OpenAI ft-gpt-4.1-nano-2025-04-14 2026-10-23 gpt-5.6-luna OpenAI ft-babbage-002 2026-10-23 gpt-5.6-terra OpenAI ft-davinci-002 2026-10-23 gpt-5.6-terra OpenAI gpt-3.5-turbo 2026-10-23 gpt-5.6-terra OpenAI gpt-3.5-turbo-completions 2026-10-23 gpt-5.6-terra OpenAI gpt-4 2026-10-23 gpt-5.6-sol OpenAI gpt-4-0613-completions 2026-10-23 gpt-5.6-sol OpenAI gpt-4-completions 2026-10-23 gpt-5.6-sol OpenAI gpt-4-turbo-2024-04-09 2026-10-23 gpt-5.6-sol OpenAI gpt-4-turbo-completions 2026-10-23 gpt-5.6-sol Per-provider migration detail: the deprecation calendar , which also shows our measured latency for the provider you would be migrating to.

Source: https://llmlatency.dev/blog/retired-2026-09 · CC BY 4.0