+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT OSS 120B vs Llama 3.1 405B Instruct
Comprehensive side-by-side LLM comparison
GPT OSS 120B leads with 16.0% higher average benchmark score. GPT OSS 120B offers 6.1K more tokens in context window than Llama 3.1 405B Instruct. GPT OSS 120B is $1.24 cheaper per million tokens. Llama 3.1 405B Instruct is available on 8 providers. Overall, GPT OSS 120B is the stronger choice for coding tasks.
+
+
+
+
OpenAI
GPT-OSS 120B was developed as an open-source model release from OpenAI, designed to provide the research and developer community with access to a capable language model. Built with 120 billion parameters, it enables experimentation, fine-tuning, and deployment in contexts where open-source licensing and transparency are valued.
+
+
+
+
Meta
Llama 3.1 405B was developed as Meta's largest open-source language model, designed to provide frontier-level capabilities with 405 billion parameters. Built to demonstrate that open-source models can match proprietary systems in capability, it enables researchers and developers to experiment with and deploy a powerful foundation model without licensing restrictions.
1 year newer
Llama 3.1 405B Instruct
Meta
2024-07-23
GPT OSS 120B
OpenAI
2025-08-05
+
+
+
+
+
+
+
+
+
+
+
+
Pricing Comparison
Cost per million tokens (USD)
+
+
+
+
GPT OSS 120B
Input:$0.09
Output:$0.45($1.24 cheaper)
+
+
+
+
Llama 3.1 405B Instruct
Input:$0.89
Output:$0.89
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
+
+
+
+
GPT OSS 120B
Average Score:85.0%(+16.0%)
+
+
+
+
Llama 3.1 405B Instruct
Average Score:69.0%
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT OSS 120B
5 providers
DeepInfra
Groq
Throughput: 500 tok/s
Latency: 0.5ms
Novita
OpenAI
Throughput: 115 tok/s
Latency: 5.2ms
ZeroEval
Throughput: 500 tok/s
Latency: 0.5ms
+
+
+
+
+
GPT OSS 120B
Avg Score:85.0%(+16.0%)
Providers:5
+
+
+
+
Llama 3.1 405B Instruct
Avg Score:69.0%
Providers:8