Two Anthropic engineers spent $200 and 6 hours on one prompt, and the result is the clearest argument yet that the harness still matters
The prompt was five words: build a retro game maker they ran it twice. same model, same prompt. the only difference was the scaffolding
Deepseek-v4.1 local beats Opus-5
Best 2 out of 3 matches Game 3 was intense. Opus was up 5 points of material at move 18, Stockfish had DeepSeek at -8.3 Then: Queen for a rook and it never gave the lead back No chess engine, no help. Opus needed 57 requests to make 31 moves.
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Most space and tech websites rely on static graphics or heavy pre-rendered videos. 🛑 This entire Earth hero isn't a video, and it isn't an image sequence. It’s an
This one sat on my shelf for a long time.
Tried it a few times, killed it every time. Too much hand work for a pair of blinking eyes. Built it in an hour with the new rive_app CLI and opus 5 Claude gave me the ASCII eyes. I built a body around them in the editor and made the
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