Meta LLaMA 3.1 vs OpenAI gpt-oss-20b — side-by-side specs.
Meta LLaMA 3.1 | OpenAI gpt-oss-20b | |
|---|---|---|
| Overview | ||
| Company | Meta | OpenAI |
| Release date | Jul 23 2024 | Aug 5 2025 |
| Model type | — | — |
| Open source | Yes | Yes |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
| Timeline | ||
| Release gap | LLaMA 3.1 shipped 378 days before gpt-oss-20b | |
LLaMA 3.1 and gpt-oss-20b don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. LLaMA 3.1 shipped 378 days before gpt-oss-20b, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — LLaMA 3.1 and gpt-oss-20b don't publish scores on any of the same benchmarks.