GPT-5.2 Codex vs Grok 3

Compare GPT-5.2 Codex and Grok 3 side by side. See pricing, capabilities, context length, and performance. Use both on Krater.ai from $20/mo.

GPT-5.2 Codex vs Grok 3: strengths, best use cases and how to run both side by side. The live page adds context windows, token pricing and more comparisons once it loads.

Try both on Krater

Run GPT-5.2 Codex and Grok 3 on the same prompt in the Krater Model Arena, then keep the winner in your workflow. One subscription covers both, from $20 a month.

Open Krater chat · GPT-5.2 Codex on Krater · Grok 3 on Krater

What each model is best at

GPT-5.2 Codex

OpenAI's dedicated coding powerhouse from the GPT-5 family. GPT-5.2 Codex delivers exceptional performance on software engineering tasks, from code generation to complex debugging.

Strengths

  • Top-tier code generation across all languages
  • Deep understanding of software architecture
  • Excellent at debugging and refactoring
  • Strong at code review and optimization

Best for

  • Professional software development
  • Large codebase refactoring
  • Complex algorithm implementation
  • Full-stack development assistance

Grok 3

xAI's latest model with exceptional reasoning and real-time knowledge. Grok 3 is known for its direct, unfiltered communication style.

Strengths

  • Strong reasoning capabilities
  • Direct, unfiltered responses
  • Real-time knowledge access
  • Excellent at complex analysis

Best for

  • Uncensored conversations
  • Real-time information needs
  • Complex analysis
  • Creative brainstorming

How we compare models

Our tested head-to-heads run the same prompt set through both models in the Model Arena, then rank answers blind. Read the testing methodology, or browse every comparison.