Comprehensive side-by-side LLM comparison
GPT-4.1 nano offers 780.3K more tokens in context window than o3-pro. GPT-4.1 nano is $99.50 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
OpenAI
GPT-4.1 Nano was developed as the smallest and most efficient variant in the GPT-4.1 family, designed for applications requiring minimal latency and resource usage. Built to enable AI capabilities on edge devices and resource-constrained environments, it distills GPT-4.1 capabilities into an ultra-compact form factor.
OpenAI
o3-pro was developed as the flagship reasoning model in the o3 family, designed to deliver maximum reasoning depth and reliability for the most challenging analytical tasks. Built for professionals requiring the highest level of thoughtful problem-solving, it extends reasoning capabilities to handle complex multi-step challenges across diverse domains.
1 month newer

GPT-4.1 nano
OpenAI
2025-04-14

o3-pro
OpenAI
2025-06-10
Cost per million tokens (USD)

GPT-4.1 nano

o3-pro
Context window and performance specifications
GPT-4.1 nano
2024-05-31
o3-pro
2024-05-31
Available providers and their performance metrics

GPT-4.1 nano
OpenAI

o3-pro

GPT-4.1 nano

o3-pro

GPT-4.1 nano

o3-pro
OpenAI