Comprehensive side-by-side LLM comparison
GPT OSS 20B leads with 17.3% higher average benchmark score. GPT OSS 20B offers 6.1K more tokens in context window than Mistral NeMo Instruct. Both models have similar pricing. 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.
Mistral AI
Mistral Nemo was developed as a mid-sized instruction-tuned model, designed to balance capability with efficiency for practical deployments. Built to serve as a versatile foundation for various applications, it provides reliable performance across general language understanding and generation tasks.
1 year newer

Mistral NeMo Instruct
Mistral AI
2024-07-18

GPT OSS 20B
OpenAI
2025-08-05
Cost per million tokens (USD)

GPT OSS 20B

Mistral NeMo Instruct
Context window and performance specifications
Average performance across 1 common benchmarks

GPT OSS 20B

Mistral NeMo Instruct
Available providers and their performance metrics

GPT OSS 20B
Groq
Novita
OpenAI
ZeroEval

GPT OSS 20B

Mistral NeMo Instruct

GPT OSS 20B

Mistral NeMo Instruct

Mistral NeMo Instruct
Mistral AI