Comprehensive side-by-side LLM comparison
GPT-5 nano leads with 2.2% higher average benchmark score. GPT-5 nano offers 383.6K more tokens in context window than GPT-4o. GPT-5 nano is $12.05 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
OpenAI
This updated version of GPT-4o was released with refinements to its multimodal capabilities and improved performance across text, vision, and audio tasks. Built to incorporate learnings from the initial GPT-4o deployment, it enhanced reliability and accuracy while maintaining the seamless cross-modal reasoning that defines the GPT-4o family.
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.
1 year newer

GPT-4o
OpenAI
2024-08-06

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

GPT-4o

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

GPT-4o

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

GPT-4o
Azure
OpenAI


GPT-4o

GPT-5 nano

GPT-4o

GPT-5 nano
GPT-5 nano
OpenAI
ZeroEval