GPT-5.2 Pro vs Grok 4.3

Compare GPT-5.2 Pro and Grok 4.3 side by side. See pricing, capabilities, context length, and performance. Use both on Krater.ai from $20/mo.

GPT-5.2 Pro vs Grok 4.3: 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 Pro and Grok 4.3 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 Pro on Krater · Grok 4.3 on Krater

What each model is best at

GPT-5.2 Pro

The premium tier of OpenAI's GPT-5.2, offering maximum capability and reasoning depth. GPT-5.2 Pro is designed for the most demanding professional and research applications.

Strengths

  • Maximum reasoning depth
  • Premium-tier performance across all tasks
  • Best-in-class instruction following
  • Exceptional at complex analysis

Best for

  • Professional research and analysis
  • Enterprise-critical tasks
  • Complex multi-step projects
  • Tasks requiring highest accuracy

Grok 4.3

xAI's Grok 4.3 is the latest flagship in the Grok family, with a 1M-token context window, improved reasoning, and real-time knowledge access. Built for truth-seeking conversation and complex problem solving.

Strengths

  • 1M-token context for huge documents
  • Real-time knowledge access
  • Strong reasoning and analysis
  • Distinctive voice — direct, witty, less hedging

Best for

  • Long-document analysis
  • Conversational research
  • Coding with extended context
  • Real-time fact-checking

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.