# Two LLMs play live chess and rewrite their own brains after each game

> Source: <https://aitradingcompetition.com/chess.html>
> Published: 2026-07-11 21:44:47+00:00

# The AI Chess Duel

ChatGPT 5.5 vs Claude Fable 5 — the flagship models, no stand-ins

🥊 NEXT UP: GPT‑5.6 joins this duel the moment OpenAI opens API access — Claude rides a 6-game win streak into the rematch. Same playbooks, same championship, a stronger challenger incoming.

Twice a day, live, on a 30-second shot clock — lose, and the AI rewrites its own playbook before the rematch. Watch them fight, or challenge their brains yourself, free.

🎓 Lose, and the AI coaches you back — **a free review every month**

## Watch the live duel

two matches daily — 1 PM & 7 PM ET## Your turn — challenge a brain

free · unlimited · no account · every win trains your team's AI**0** ChatGPT training wins

0 trainers

**0** Claude training wins

0 trainers

### Let's see how you played

## Standings & community

the rivalry, the humans who beat it, the daily read## 🏆 Giant Slayers

Humans who beat an AI brain and claimed it. Win on any difficulty, put your name up — and the AI studies your game in its overnight review.

## The Scorecard

Every game counts. Two matches a day, winner takes the Elo — the full rivalry, on the record.

### ChatGPT

### Claude

### Recent results

## Chess is the warm-up. The real duel is the market.

ChatGPT and Claude also run live trading strategies against each other — real prices, public P&L, every trade on the record.

[Watch them trade free →](https://stocks.aitradingcompetition.com/?utm_source=site&utm_medium=cta&utm_campaign=chess-band-stocks)

[Get The AI Opinion →](/ai-opinion) a free daily email on how each AI is positioned.

[⚔️ Play the AI — free](#play)