One dev vibe-coded a Homeworld clone with Opus 5 for $632

The receipt is the story. A developer posting as nooooob handed Claude Opus 5 a modified "one-shot AAA" prompt asking for a Homeworld-style, universe-scale space RTS — and got back a playable 3D game. Assets: none imported. Models: generated. The run burned 68.6k input tokens, 4.6M output tokens, 837.2M cache reads and 13.6M cache writes, for a total bill of $632.65.

That fits the shape of Opus 5, which Anthropic shipped on 24 July 2026. It posts 96.0% on SWE-bench Verified and leads Anthropic's own agentic-coding eval Frontier-Bench v0.1 at 43.3% — ahead of both Fable 5 (33.7%) and GPT-5.6 Sol (34.4%). The bigger jump for this kind of work is multimodal: SWE-bench Multimodal went from 38.4% to 59.4%, and early testers have been loudest about the model's 3D and animation output.

Caveats apply. The creator flagged "minor gameplay issues," nobody has audited the codebase, and a 59.6 MB Telegram drop is not a shipped title. But the interesting number isn't the benchmark — it's that a genre that used to mean a studio and a year now has a price tag roughly equal to a mid-range GPU.

Why it matters: when a full 3D RTS costs $632 in tokens, the bottleneck in game dev stops being labour and starts being taste.