Comprehensive side-by-side LLM comparison
GPT OSS 120B leads with 9.6% higher average benchmark score. GPT-5 nano offers 265.9K more tokens in context window than GPT OSS 120B. Both models have similar pricing. GPT-5 nano supports multimodal inputs. GPT OSS 120B is available on 5 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.
OpenAI
GPT-5 Nano was developed as the most compact variant in the GPT-5 family, designed for deployment in resource-constrained environments and edge computing scenarios. Built to bring next-generation AI capabilities to devices and applications where latency and efficiency are paramount, it distills GPT-5 innovations into a minimal footprint.
2 days newer

GPT OSS 120B
OpenAI
2025-08-05

GPT-5 nano
OpenAI
2025-08-07
Cost per million tokens (USD)

GPT OSS 120B

GPT-5 nano
Context window and performance specifications
Average performance across 2 common benchmarks

GPT OSS 120B

GPT-5 nano
GPT-5 nano
2024-05-30
Available providers and their performance metrics

GPT OSS 120B
DeepInfra
Groq
Novita
OpenAI
ZeroEval

GPT OSS 120B

GPT-5 nano

GPT OSS 120B

GPT-5 nano

GPT-5 nano
OpenAI
ZeroEval