Anthropic just published the system prompts behind every claude model.
Their own docs, every model from Haiku 3 through Fable 5 and Opus 5, sorted by release date. What's actually in there: → the exact instructions each model gets before you type a single word → how the
Qwen 3.8 27B just dropped, so we put it head-to-head against GLM 5.3, Kimi K3, and Opus 5 on the same prompt.
All four managed to ship something playable: movement, shooting, hit detection, enemy spawning, etc. But Qwen 3.8 27B stands out for a few reasons: • Dense 27B model
Using Opus 5 to transform Kart Royale in to a space racing game
Landing pages that Opus 5 can create in Three.js.
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All of Claude Opus 5