Comprehensive side-by-side LLM comparison
GPT-4.1 nano supports multimodal inputs. 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
GPT-5 Codex was developed as a specialized variant of GPT-5 optimized for programming and software development tasks. Built to understand and generate code across multiple programming languages, it serves developers with enhanced capabilities for code completion, debugging, translation, and explanation of complex codebases.
5 months newer

GPT-4.1 nano
OpenAI
2025-04-14

GPT-5 Codex
OpenAI
2025-09-15
Context window and performance specifications
GPT-4.1 nano
2024-05-31
GPT-5 Codex
2024-09-30
Available providers and their performance metrics

GPT-4.1 nano
OpenAI

GPT-5 Codex

GPT-4.1 nano

GPT-5 Codex

GPT-4.1 nano

GPT-5 Codex