GPT 5.6 vs Claude Fable 5: The Best AI Model Across 6 Practical Use Cases

I tested both models for designing websites, building 3D games, publishing video clips, prototyping mobile app features, and more. Here's my verdict for each use case.

GPT 5.6 vs Claude Fable 5: The Best AI Model Across 6 Practical Use Cases

TL;DR

  • OpenAI's GPT 5.6 is now available, with models Sol, Terra, and Luna.
  • GPT 5.6 Sol outperforms Claude Fable 5 on the TerminalBench 2.1 coding benchmark (88.8% vs 84.3%).
  • GPT 5.6 Sol is 50% cheaper than Claude Fable 5 at API prices.
  • The article benchmarks both models on six practical use cases, starting with building an interactive travel website.
  • GPT 5.6 has significantly closed the gap in front-end design compared to previous versions, creating an animated 3D Torii Gate for a travel website.
  • Claude Fable 5 created beautiful animated snowflakes for the travel website design.
  • Both models were tested on creating a 3D Star Fox-style game.