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

Mistral NeMo vs GPT-4.5

Mistral
Mistral NeMo
OpenAI
GPT-4.5
Overview
CompanyMistralOpenAI
Release dateJul 18 2024Feb 27 2025
AccessOpen WeightProprietary
Specifications
Parameters
12B
Context window
128k
Timeline
Release gapMistral NeMo shipped 224 days before GPT-4.5

Which is better: Mistral NeMo or GPT-4.5?

Mistral NeMo and GPT-4.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral NeMo shipped 224 days before GPT-4.5, so benchmark comparisons should account for the intervening progress.

Mistral NeMo is open weight, while GPT-4.5 is proprietary.

Direct benchmark comparisons are unavailable — Mistral NeMo and GPT-4.5 don't publish scores on any of the same benchmarks.

Frequently asked questions

Mistral NeMo was released by Mistral on Jul 18 2024.

GPT-4.5 was released by OpenAI on Feb 27 2025.

Mistral NeMo is an open weight model released by Mistral. GPT-4.5 is a proprietary model released by OpenAI.

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