Counter-Strike 2 — clone it in the browser
Two sentences, no spec, no stack imposed: clone CS2 so it runs in a browser. Four models took the same prompt. Fable 5 and GPT-5.6 Sol both produced a playable round with bots and a buy menu; Grok 4.5 shipped an FPS with no minimap, no buy menu and no bomb. Opus 5 ran for 37 hours and added radar, sound, menus and bomb defusal that nobody asked for.
"Counter-Strike 2 — clone it in the browser" is one prompt run by 4 models: Fable 5, GPT-5.6 Sol, Grok 4.5 and Opus 5. 4 of 4 finished, on figures reported by the author.
- Models
- 4
- Completed
- 4 of 4
- Cheapest completed run
- not measured
Figures reported by Luke The Dev. Not independently verified.
Numbers on this page were reported by the author. We did not run this comparison and cannot verify them.
Four runs posted one at a time by the author between 10 and 27 July 2026, each with its own video; the prompt is published verbatim in a reply to the first. Only wall-clock time was stated, and only for three of the four — no tokens and no cost were published, so nothing on this page is a measured figure. The Opus 5 run is the one departure from the single prompt: it froze the author's machine after 18 hours and was restarted, so its 37 hours cover two prompts rather than one. Sources — prompt: https://x.com/iamlukethedev/status/2075431266036732166 · Fable 5: https://x.com/iamlukethedev/status/2075431175321972919 · GPT-5.6 Sol: https://x.com/iamlukethedev/status/2075717940071338181 · Grok 4.5: https://x.com/iamlukethedev/status/2076067349682421878 · Opus 5: https://x.com/iamlukethedev/status/2081829763489169636
Output
Clone the game counter-strike 2. I don't care what technology you use but it needs to work in the browser. Graphics must match and look amazing, gameplay must be the same and I don't care about multiplayer right now
Runs
| Model | Harness | Status | Cost | Duration | Output | Trust | Artifact |
|---|---|---|---|---|---|---|---|
| Fable 5fable-5 | claude-code | Completed | not measured | 1h 44m | not measured | Reported | — |
| GPT-5.6 Solgpt-5-6-sol | — | Completed | not measured | 23m 00s | not measured | Reported | — |
| Grok 4.5grok-4-5 | — | Completed | not measured | not measured | not measured | Reported | — |
| Opus 5claude-opus-5 | — | Completed | not measured | 37h 00m | not measured | Reported | — |