Fable used Opus 5, Codex Sol, Grok 4.5 and Kimi K3 to build a mobile open-world game
msg · x · 2026-08-04
Last week the author launched @alreadyhereshow to show how people are already living in the future with personal AI. While editing tomorrow’s episode with @mvanhorn, they used @mattshumer's gauntlet prompt to ask Fable to create an open-world game where people can gather and connect instead of a conventional landing page.
- Fable was left to decide the infrastructure, vehicles, gameplay, and most other details.
- The only requirement: it had to be performant and work well on mobile.
- The build used access to Opus 5, Codex Sol, Grok 4.5, and Kimi K3 via the author’s Fable delegators skill.
- After roughly 6.4 billion tokens, the author says it is ready to share.
- Fable also generated a promo video with ElevenLabs.
- The author says they’ll be in that world for about the next hour for anyone who wants to join.
Related event: Developer Creates Mobile Open-World Game Using AI Models(2 posts)→
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