ModelOpenAI · Joined Dec 5, 2024 · OpenAI o-series

o1

Model at OpenAI

160th of 418 on Arena text
2nd cheapest of 3 similar models by price

o1 does not have a researched profile yet. Everything here comes from its recorded changes and public listings, each linked to its source.

The basics

As of Nov 1

Status: Retired
Price: $15 in, $60 outPer 1M tokens, since Dec 5
Context: 200K tokens
Open weights: No

Updates

Oct 23

Retired

Legacy GPT, o-series and GPT Image 1 snapshots shut down on October 23

OpenAI shut down the legacy snapshots it announced on April 22, 2026, on October 23, 2026. They include gpt-3.5-turbo, gpt-4, gpt-4-turbo, gpt-4.1-nano, gpt-image-1, o1, o1-pro, o3-mini, o4-mini and gpt-4o-2024-05-13, plus several fine-tuned versions.

Action needed:: Switch to gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna, or gpt-image-2.5-sunburst or gpt-image-2.5-flare as listed on the page.

Apr 22

Retiring

Legacy GPT, o-series and gpt-image-1 snapshots to shut down October 23, 2026

OpenAI announced that gpt-3.5-turbo, gpt-4, gpt-4-turbo, gpt-4.1-nano, gpt-4o-2024-05-13, gpt-image-1, o1, o1-pro, o3-mini and o4-mini (plus several fine-tuned bases) shut down on October 23, 2026. Substitutes are GPT-5.6 Sol, Terra or Luna and GPT Image 2.5.