Grok 4.5 just COOKED Claude and OpenAI — Key Takeaways

Use Grok 4.5 as the execution layer paired with a frontier model (e.g., Claude Fable 5) as architect — this combination built a 50-district animated 3D city for ~$8 versus ~$80 using Fable alone.
Key takeaways
Orchestrator/executor split: frontier model architects, cheap model builds
Orchestrator/executor split: frontier model architects, cheap model builds
- Fable 5 produced specs and rejection criteria; Grok 4.5 never saw the full city, built one district per API call.
- Fable's review: 'first drafts were shockingly clean, all animations shipped' — contract obedience was high.
Fable5+Grok4.5 pipeline built 50-district 3D city for ~$8 vs ~$80 solo
Fable5+Grok4.5 pipeline built 50-district 3D city for ~$8 vs ~$80 solo
- Fable 5 architected specs and validation; Grok 4.5 executed 1.35M tokens of district code at ~$8 total.
- Fable estimated the same output would cost ~$70-80 if Fable 5 handled all generation directly.
Grok Build: CLI coding agent using Grok 4.5 as default, rival to Claude Code
Grok Build: CLI coding agent using Grok 4.5 as default, rival to Claude Code
- Auto mode with full tool access; demonstrated end-to-end game generation including 11Labs audio integration.
- Cursor co-founder called it 'Opus-class, fast, low cost' and the daily driver for Cursor's own team.
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In this video
- 1mGrok 4.5 is live
- 4mGenSpark (sponsor)
- 9m3d sailing game
- 15mTES RPG game
- 22mother test, SVGs etc
- 25mCursors role in Grok
- 27mthe Ultimate test...
- 31mwhat this means...
“Fable 5 is the architect and Groc 4.5 is the construction crew.”
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