Feed captured 2026-10-13
o1 retirement dates
OpenAI lists October 23, 2026 as the API shutdown date for o1. The deadline applies to the exact IDs below. Partner platforms publish their own schedules; the replacement name does not establish equivalent behavior.
Dates belong to the ID and serving route
| Model ID | Route | Published date | Replacement | Source |
|---|---|---|---|---|
| o1 | OpenAI API | 2026-10-23 | gpt-5.6-sol | Provider notice |
| o1-2024-12-17 | OpenAI API | 2026-10-23 | gpt-5.6-sol | Provider notice |
| o1@2024-12-17 | Azure AI Foundry | 2026-11-19 | gpt-5.6-sol | Provider notice |
The provider named each replacement. Equivalent behavior, pricing, or access is not asserted. Feed capture time is separate from the provider’s announcement and effective dates.
Test the replacement before switching
Find the exact model ID in application configuration and request logs. Compare output format, tool calls, latency, token use, and failure handling on your own inputs. The workload test guide explains the checks; the OpenAI calendar keeps the wider schedule.