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

LLaMA 2 vs GPT-5 nano

Meta
LLaMA 2
OpenAI
GPT-5 nano
Overview
CompanyMetaOpenAI
Release dateJul 18 2023Aug 7 2025
AccessOpen WeightProprietary
Timeline
Release gapLLaMA 2 shipped 751 days before GPT-5 nano

Which is better: LLaMA 2 or GPT-5 nano?

LLaMA 2 and GPT-5 nano don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. LLaMA 2 shipped 751 days before GPT-5 nano, so benchmark comparisons should account for the intervening progress.

LLaMA 2 is open weight, while GPT-5 nano is proprietary.

Direct benchmark comparisons are unavailable — LLaMA 2 and GPT-5 nano don't publish scores on any of the same benchmarks.

Frequently asked questions

LLaMA 2 was released by Meta on Jul 18 2023.

GPT-5 nano was released by OpenAI on Aug 7 2025.

LLaMA 2 is an open weight model released by Meta. GPT-5 nano is a proprietary model released by OpenAI.

Other comparisons