The author shared this prompt in their post.
Build the highest-quality playable PUBG you can.
Claude Opus 5.5 vs GPT-6 Astra in 3D gaming. From a single prompt: “Build the highest-quality playable PUBG you can.” I went to sleep. When I woke up, both had built a fully playable game🤯 Opus worked for 10 hours end to end, while Astra took just 3.
6:23Opus 5.5 just one-shot this 90s-style demoscene demo for me. It's pretty good.
It's a genuine one-shot (in colloquial X post sense - single prompt) and my first attempt asking it to do such a thing. I just supplied Purple Motion's music from Second Reality. C/C++ and OpenGL.
4:48Another World ZX Next port. Ported with Claude Opus 5.5 using a NextBuild agent pack, original DOS game and ported Another World Interpreter sources (https://github.com/fab.../Another-World-Bytecode-Interpreter)
1:03Getting bored of the standard one shot games/3d stuff, I think at least in the medium term the much more interesting side of things is the modding
I had Opus 5.5 take the Majora's Mask recomp and build a full new area. It's got puzzles, enemies, rewards, and a mini dungeon...
1:16Opus 5.5 had the best run with FishSlop that I've ever seen.
The animation quality is incredible. The controls feel so much better than any other version I've generated. There's even a complete gameplay loop with a functional in-game economy and unlocks.
2:21Third iteration with Opus 5.5 medium.
I am in awe. It turned blender, image-gen, and three.js into this beauty, which runs on your browser.
An understatement to say that Anthropic cooked. You are looking at the future of game dev.
0:32CLAUDE OPUS 5.5 AND GPT-6 SOL JUST TIED?
Same prompt. Same game brief.
Opus is the more expensive model, but Sol landed right in the same tier visually - and in some moments, it might even look better.
That’s the interesting part here:
much cheaper model, very similar final
0:29我尼玛，Opus 5.5 已经强大到这种地步了吗？
使用 three.js 打造出来的 NBA 2K 页游，这场景、这动作，十年前需要一支团队打造的游戏，现在一个人一句话就可以完成
想订阅 Claude 的心已经达到了顶峰
1:30Roblox game development is over. Left Opus 5.5 running overnight