AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

DeepSeek V3.1 Terminus vs o1-pro

DeepSeek
DeepSeek V3.1 Terminus
OpenAI
o1-pro
Overview
CompanyDeepSeekOpenAI
Release dateSep 22 2025Mar 19 2025
AccessOpen WeightProprietary
Timeline
Release gapo1-pro shipped 187 days before DeepSeek V3.1 Terminus

Which is better: DeepSeek V3.1 Terminus or o1-pro?

DeepSeek V3.1 Terminus and o1-pro don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o1-pro shipped 187 days before DeepSeek V3.1 Terminus, so benchmark comparisons should account for the intervening progress.

DeepSeek V3.1 Terminus is open weight, while o1-pro is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek V3.1 Terminus and o1-pro don't publish scores on any of the same benchmarks.

Frequently asked questions

DeepSeek V3.1 Terminus was released by DeepSeek on Sep 22 2025.

o1-pro was released by OpenAI on Mar 19 2025.

DeepSeek V3.1 Terminus is an open weight model released by DeepSeek. o1-pro is a proprietary model released by OpenAI.

Other comparisons