Comprehensive side-by-side LLM comparison
GPT OSS 20B leads with 5.1% higher average benchmark score. GPT OSS 20B is available on 4 providers. Overall, GPT OSS 20B is the stronger choice for coding tasks.
OpenAI
GPT-OSS 20B was created as a smaller open-source variant, designed to balance capability with accessibility for researchers and developers. Built with 20 billion parameters, it provides a more approachable entry point for those seeking to work with open-source language models while benefiting from OpenAI's architectural insights.
NVIDIA
Llama 3.1 Nemotron 70B was developed by NVIDIA through customization of Meta's Llama 3.1 70B, designed to enhance performance for specific use cases and deployments. Built with NVIDIA's optimizations and fine-tuning expertise, it demonstrates how foundation models can be adapted for specialized applications.
10 months newer

Llama 3.1 Nemotron 70B Instruct
NVIDIA
2024-10-01

GPT OSS 20B
OpenAI
2025-08-05
Context window and performance specifications
Average performance across 1 common benchmarks

GPT OSS 20B

Llama 3.1 Nemotron 70B Instruct
Llama 3.1 Nemotron 70B Instruct
2023-12-01
Available providers and their performance metrics

GPT OSS 20B
Groq
Novita
OpenAI
ZeroEval

GPT OSS 20B

Llama 3.1 Nemotron 70B Instruct

GPT OSS 20B

Llama 3.1 Nemotron 70B Instruct

Llama 3.1 Nemotron 70B Instruct