Claude Haiku 4.5 vs GPT-5.2 Pro

Compare Claude Haiku 4.5 and GPT-5.2 Pro side by side. See pricing, capabilities, context length, and performance. Use both on Krater.ai from $20/mo.

Claude Haiku 4.5 vs GPT-5.2 Pro: 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 Claude Haiku 4.5 and GPT-5.2 Pro 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 · Claude Haiku 4.5 on Krater · GPT-5.2 Pro on Krater

What each model is best at

Claude Haiku 4.5

The newest and fastest model in the Claude family. Claude Haiku 4.5 delivers impressive capabilities at lightning speed, perfect for real-time applications and high-volume usage.

Strengths

  • Ultra-fast response times
  • Previous-gen Sonnet-level quality
  • Very cost-effective
  • Strong coding for its speed tier

Best for

  • Real-time chat applications
  • High-volume API usage
  • Quick coding assistance
  • Cost-sensitive deployments

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

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.