Comprehensive side-by-side LLM comparison
. Both models have their strengths depending on your specific coding needs.
DeepSeek
DeepSeek-R1-Zero was introduced as an experimental variant trained with minimal human supervision, designed to develop reasoning patterns through self-guided reinforcement learning. Built to explore how models can discover analytical strategies independently, it represents research into autonomous reasoning capability development.
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.
7 months newer

DeepSeek R1 Zero
DeepSeek
2025-01-20

GPT-5 Codex
OpenAI
2025-09-15
GPT-5 Codex
2024-09-30
Available providers and their performance metrics

DeepSeek R1 Zero

GPT-5 Codex

DeepSeek R1 Zero

GPT-5 Codex