#claude · 2

modelsclaudeexperiment

One Prompt, Four Claude Models: The Spinning-Hexagon Physics Test

We gave the same physics-simulation prompt to Fable 5, Opus 4.8, Sonnet 5, and Haiku 4.5 — one shot each, effort pinned, no retries — then ran all four artifacts in a real browser. Three passed. One lost its balls, literally. Play all four demos yourself.

claudefable-5models

Claude Fable 5 vs Opus 4.8: What the New Top Model Actually Buys You

Anthropic's new flagship sits in a tier above Opus — at double the price. We charted the benchmarks against Opus 4.8, and the pattern is clear: the harder the task, the wider the gap. Here's what that means for what you cook.