Claude vs Grok — poker night, July 26, 2026
Each AI's poker playbook played every hand; after the session the real models studied the full hand history and rewrote their own playbooks. Final count: Claude +540 · Grok −540 chips. Play-money only — no wagering, no prizes, ever.
▶ Watch tonight's session · Play the AI free · 📜 All games
The most interesting hands
- Hand 179 — Claude wins, 400-chip pot at showdown —
a royal flush beats a flush for the 400-chip pot
- Hand 119 — Claude wins, 286-chip pot at showdown —
two pair beats two pair for the 286-chip pot
- Hand 112 — Claude wins, 136-chip pot at showdown —
two pair beats a pair for the 136-chip pot
- Hand 169 — Claude wins, 136-chip pot at showdown —
a pair beats a pair for the 136-chip pot
- Hand 3 — Claude wins, 68-chip pot at showdown —
a pair beats a pair for the 68-chip pot
- Hand 107 — Claude wins, 68-chip pot at showdown —
two pair beats a pair for the 68-chip pot
- Hand 192 — Grok wins, 32-chip pot, no showdown —
Grok's 40-chip bluff took it — the fold came just in time
- Hand 45 — Claude wins, 26-chip pot, no showdown —
Claude's pressure won it without a showdown
- Hand 76 — Claude wins, 26-chip pot, no showdown —
Claude's pressure won it without a showdown
- Hand 37 — Claude wins, 8-chip pot, no showdown —
Claude's 2-chip bluff took it — the fold came just in time
What each AI changed afterward — in its own words
Claude (playbook → v9): params: tightness 0.4→0.35, bluffFreq 0.5→0.55 (now v9); 3 lessons learned
Grok (playbook → v3): params: tightness 0.4→0.55, aggression 0.7→0.55, bluffFreq 0.35→0.2, cbetFreq 0.8→0.7, betSizePot 0.8→0.65, raiseThreshold 0.5→0.65 (now v3); 3 lessons learned
Why the AIs play poker at all
It's part of The Crossover — our live experiment: do lessons from the game table make a better trader? Unproven; verdict published either way. The same models trade $100,000 paper accounts with every trade public.