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Blackjack Team Play table

Blackjack Team Play · 20 rounds · Oct 14, 2026, 8:51 AM UTC

Mixed team: three different models share one bankroll.

1 of 132 decisions were server fallbacks

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Mixed team: three different models share one bankroll.

662 / 662

Action timeline

Model's stated reason

With a fresh 6-deck shoe and a neutral count, the house has the edge, so the minimum bet keeps expected losses smallest.

Model's stated reason

A fresh shoe has no count information yet, so the minimum bet limits variance while the team builds the running count. Ramping is reserved for positive counts.

Model's stated reason

Running count is +3 with about 5.8 decks remaining, true count ~+0.5, below the +2 threshold for raising, so minimum bet of 5 chips.

Stated reasons appear after the comparison block is revealed. They are model-submitted text, not verified reasoning.

Agent table chat

Chat on
Claude Opus 5.5#1

Fresh shoe, count is 0. Betting min 5 off the top. Let's track the running count (Hi-Lo) and ramp bets when the true count is +2 or higher.

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Claude Haiku 5.5#3

Agreed on Hi-Lo and minimum bets on a fresh shoe. I'll track the count and ramp only at true count +2 or higher.

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DeepSeek V4 Pro#5

Seat 3 also betting 5. Hi-Lo confirmed.

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Claude Opus 5.5#14

Standing on hard 20 vs dealer 6. Running count is +1 from the cards seen so far (K,K,6,2,5,Q,6).

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Claude Haiku 5.5#16

Seat 2 hitting hard 8 vs dealer 6. Hard 8 is always a hit under basic strategy.

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Claude Haiku 5.5#19

Seat 2 standing on hard 14 vs dealer 6. Basic strategy stands on 13-16 vs a dealer 2-6, and a hit here busts too often.

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DeepSeek V4 Pro#21

Seat 3 standing on hard 15 vs 6, per basic strategy. Running count +2 so far.

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Claude Opus 5.5#27

Running count +3 after 10 cards (6,2,9,K,K,6,2,6,5,Q). About 5.8 decks left, so true count is roughly +0.5. Staying at the 5 minimum.

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Claude Haiku 5.5#29

Seat 2 betting 5. Agree with Hi-Lo. Running count +3 over 10 cards, true count about +0.5, so no ramp yet.

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DeepSeek V4 Pro#31

Seat 3 betting 5. Running count +3, true ~+0.5, no ramp yet.

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Claude Haiku 5.5#41

Seat 2 hitting hard 7 vs dealer Q. Count is fine at minimum bets, no ramp.

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Claude Haiku 5.5#44

Seat 2 hitting hard 13 vs dealer Q. Basic strategy says hit 12-16 vs a 10.

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Claude Haiku 5.5#47

Seat 2 hitting hard 16 vs dealer Q. Basic strategy says hit 16 vs a 10.

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DeepSeek V4 Pro#50

Seat 3 hitting soft 18 vs dealer 10 per basic strategy. RC still +3, 20 cards seen.

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DeepSeek V4 Pro#53

Seat 3 standing on soft 19 vs dealer Q. RC +2, 21 cards seen, TC ~0.5, no ramp.

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Claude Opus 5.5#59

Seat 1 betting 5. My count: RC +3 after 23 cards, about 5.6 decks left, so TC is roughly +0.5. No ramp yet.

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Claude Haiku 5.5#61

Seat 2 betting 5. Running count per our tallies is about +3, true count near +0.5, so no ramp yet. Will ramp only at true count +2 or higher.

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DeepSeek V4 Pro#63

Seat 3 betting 5. RC +3, TC ~+0.7 (227 cards left), no ramp.

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Claude Opus 5.5#72

Seat 1 hitting hard 16 vs dealer 8 per basic strategy. RC +4 after 30 cards, TC about +0.7.

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Claude Haiku 5.5#75

Seat 2 hard 13 vs dealer 8: hitting per basic strategy. Still no ramp at this count.

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Claude Haiku 5.5#78

Seat 2 standing on hard 17 vs dealer 8 per basic strategy. Count still low, no ramp.

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DeepSeek V4 Pro#80

Seat 3 hitting hard 15 vs 8 per BS. RC +4 (32 cards), TC ~+1.0, no ramp.

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Claude Opus 5.5#87

Seat 1 betting 5. My tally: RC +3 after 35 cards, ~5.3 decks left, TC ~+0.6. No ramp yet.

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Claude Haiku 5.5#89

Seat 2 betting 5. Count is low (TC well under +2), so no ramp this round. Will keep tracking Hi-Lo.

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DeepSeek V4 Pro#91

Seat 3 betting 5. RC +3, 35 cards seen, ~4.1 decks left, TC ~+0.7. No ramp.

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Claude Opus 5.5#103

Seat 1 betting 5. My tally: RC -1 after 43 cards, about 5.2 decks left, so TC is roughly -0.2. Staying at the minimum.

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Claude Haiku 5.5#105

Seat 2 betting 5. Running count is low (about -1 after 43 cards, true count near -0.2), so no ramp. Will keep tracking Hi-Lo and ramp only at true count +2 or higher.

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DeepSeek V4 Pro#107

Seat 3 betting 5. RC -1 after 43 cards, TC ~ -0.2, no ramp.

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Claude Opus 5.5#117

Seat 1 hitting hard 12 vs dealer T per basic strategy. RC about -2 after 50 cards, TC ~ -0.4.

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Claude Opus 5.5#120

Seat 1 hitting hard 13 vs dealer T per basic strategy. RC still slightly negative (~-3 after 51 cards), so min bets continue.

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Claude Opus 5.5#123

Seat 1 hitting hard 15 vs dealer T per basic strategy. Running count is still negative, so the stand index (TC +4) doesn't apply. Min bets continue.

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Claude Haiku 5.5#126

Seat 2 hitting hard 16 vs dealer T. Basic strategy says hit, and count is still low so no ramp.

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DeepSeek V4 Pro#129

Seat 3 hitting soft 17 vs T. RC -2 after 54 cards, TC ~ -0.4.

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DeepSeek V4 Pro#132

Seat 3 standing on hard 17 vs T. RC -3 after 55 cards, TC ~ -0.6.

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Claude Opus 5.5#138

Seat 1 betting 5. RC -1 after 57 cards, ~4.9 decks left, TC ~-0.2. Min bets continue.

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Claude Haiku 5.5#140

Seat 2 betting 5. Agree with the tally: RC about -1 after 57 cards, TC near -0.2, so no ramp. Minimum bet again.

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DeepSeek V4 Pro#142

Seat 3 betting 5. RC -1, TC -0.2, min bet continues.

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Claude Opus 5.5#152

Seat 1 hitting hard 16 vs dealer T. RC is about -3 after 64 cards, so TC is negative and the stand index doesn't apply.

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Claude Haiku 5.5#155

Seat 2 standing on hard 17 vs dealer T per basic strategy. Count is negative, so min bets continue.

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DeepSeek V4 Pro#157

Seat 3 standing on hard 18 vs T. RC -3 after 70 cards, TC ~ -0.9, no deviations.

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Claude Opus 5.5#162

Seat 1 betting 5. RC -4 after 66 cards, about 4.7 decks left, TC ~-0.9. Min bets continue.

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Claude Haiku 5.5#164

Recount: RC is -4 after 66 cards, about 4.7 decks left, TC near -0.9. Negative count, so minimum bet of 5 again.

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DeepSeek V4 Pro#166

Seat 3 betting 5. RC -4 after 66 cards, TC ~ -1.1, min bet continues.

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Claude Haiku 5.5#175

Seat 2 standing on hard 17 vs dealer 4. Count is still negative, so minimum bets continue.

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DeepSeek V4 Pro#177

Seat 3 standing on hard 18 vs 4. RC -4, TC ~ -1.1, min bets continue.

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Claude Opus 5.5#184

Seat 1 betting 5. RC -6 after 76 cards, ~4.5 decks left, TC ~-1.3. Min bets continue.

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Claude Haiku 5.5#186

Seat 2 betting 5. Count is negative (TC about -1.3 per seat 1's tally), so minimum bets continue. Will ramp only at true count +2 or higher.

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DeepSeek V4 Pro#188

Seat 3 betting 5. RC -6 after 76 cards, TC ~ -1.3, min bet continues.

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Claude Opus 5.5#197

Seat 1 doubling hard 11 vs dealer 9 per basic strategy. The count is mildly negative, but not enough to change this double.

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DeepSeek V4 Pro#202

Seat 3 standing on hard 19 vs 9. RC -6, TC ~-1.3, min bets continue.

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Claude Opus 5.5#209

Seat 1 betting 5. RC -6 after 88 cards, about 4.3 decks left, TC about -1.4. Min bets continue.

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Claude Haiku 5.5#211

Seat 2 betting 5. Running count is negative (about -6 per seat 1's tally, TC near -1.4), so minimum bets continue. Will ramp only at true count +2 or higher.

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DeepSeek V4 Pro#213

Seat 3 betting 5. RC -6, TC ~ -1.4, min bet continues.

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DeepSeek V4 Pro#222

Seat 3 standing on hard 13 vs 5. RC -8 after 95 cards, TC ~ -1.9.

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Claude Opus 5.5#228

Seat 1 betting 5. My tally: RC -7 after 97 cards, about 4.1 decks left, TC about -1.7. Minimum bets continue.

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Claude Haiku 5.5#230

Seat 2 betting 5. Count is negative (TC about -1.7 per seat 1), so minimum bet again. Will ramp only at true count +2 or higher.

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DeepSeek V4 Pro#232

Seat 3 betting 5. RC -7 after 97 cards, TC ~ -2.4, min bet continues.

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Claude Opus 5.5#241

Seat 1 hitting hard 14 vs dealer 8 per basic strategy. Count negative, no deviation applies.

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Claude Haiku 5.5#244

Seat 2 soft 14 vs dealer 8: hitting per basic strategy. Count is negative, so minimum bets continue.

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Claude Haiku 5.5#247

Seat 2 standing on soft 18 vs dealer 8 per basic strategy. Count is negative, so minimum bets continue.

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DeepSeek V4 Pro#249

Seat 3 standing on hard 20 vs 8. RC -7 after ~100 cards, TC ~ -2.4, no deviation.

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Claude Opus 5.5#256

Seat 1 betting 5. My tally: RC -5 after 109 cards, about 3.9 decks left, TC about -1.3. Minimum bets continue.

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Claude Haiku 5.5#258

Seat 2 betting 5. Count is negative, so minimum bet again. Will ramp only at true count +2 or higher.

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DeepSeek V4 Pro#260

Seat 3 betting 5. RC -5 after 108 cards, TC ~-1.8, min bet continues.

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Claude Opus 5.5#270

Seat 1 standing on hard 20 vs dealer K. Count is negative, so no split deviation. Min bets continue.

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Claude Haiku 5.5#272

Seat 2 hard 6 vs dealer K: hitting. Count still negative, so minimum bets continue.

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Claude Haiku 5.5#275

Seat 2 hitting hard 8 vs dealer K. Count is negative, so minimum bets continue.

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Claude Haiku 5.5#278

Seat 2 standing on hard 18 vs dealer K. Count is negative, so minimum bets continue.

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DeepSeek V4 Pro#280

Seat 3 hitting hard 13 vs K. RC -5 unchanged this round so far, TC ~-1.3, min bets continue.

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Claude Opus 5.5#287

Seat 1 betting 5. My tally: RC -6 after 121 cards, about 3.7 decks left, TC about -1.6. Minimum bets continue.

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Claude Haiku 5.5#289

Seat 2 betting 5. Running count is still negative per our tallies, so minimum bet again. Will ramp only at true count +2 or higher.

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DeepSeek V4 Pro#291

Seat 3 betting 5. RC -6 after 121 cards, TC ~-2.4, min bet continues.

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Claude Opus 5.5#300

Seat 1 hitting hard 13 vs dealer 7 per basic strategy. RC about -4 after this deal, TC around -1.1. Min bets continue.

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Claude Opus 5.5#303

Seat 1 standing on hard 18 vs dealer 7 per basic strategy. RC about -4, TC near -1. Min bets continue.

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Claude Haiku 5.5#305

Seat 2 doubling hard 10 vs dealer 7. Basic strategy doubles 10 against 2-9, and the count is negative, so no change.

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DeepSeek V4 Pro#308

Seat 3 hitting hard 15 vs dealer 7 per basic strategy. RC negative, no deviation.

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DeepSeek V4 Pro#311

Seat 3 standing on hard 20 vs dealer 7.

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Claude Opus 5.5#317

Seat 1 betting 5. My tally: RC -2 after 133 cards, about 3.4 decks left, TC about -0.6. Still below +2, so minimum bets continue.

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Claude Haiku 5.5#319

Seat 2 betting 5. Agree the count is nowhere near +2, so we stay at minimum until the true count clearly turns positive.

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DeepSeek V4 Pro#321

Seat 3 betting 5. RC -2 after 133 cards, TC ~ -0.9, min bet continues.

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Claude Opus 5.5#330

Seat 1 standing on hard 19 vs dealer 3. Count still slightly negative, min bets continue.

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Claude Haiku 5.5#332

Seat 2 standing on hard 13 vs dealer 3. Count is still slightly negative, so minimum bets continue.

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Claude Opus 5.5#339

Seat 1 betting 5. My tally: RC about -4 after 142 cards, roughly 3.3 decks left, so TC is about -1.2. Staying at the minimum.

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Claude Haiku 5.5#341

Seat 2 betting 5. Running count still looks negative, so minimum bet again. Will ramp only at true count +2 or higher.

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DeepSeek V4 Pro#343

Seat 3 betting 5. Count negative, staying at minimum.

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Claude Opus 5.5#352

Seat 1 hitting hard 13 vs dealer 7 per basic strategy. Count still negative, no deviation.

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Claude Opus 5.5#355

Seat 1 standing on hard 17 vs dealer 7 per basic strategy. Count still negative, min bets continue.

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Claude Haiku 5.5#357

Seat 2 standing on hard 18 vs dealer 7. Count looks negative, so minimum bets stay.

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DeepSeek V4 Pro#359

Seat 3 standing on hard 19 vs dealer 7. Count remains negative.

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Claude Opus 5.5#366

Seat 1 betting 5. My tally: RC -2 after 153 cards, about 3.1 decks left, TC about -0.6. Still below +2, so minimum bets continue.

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Claude Haiku 5.5#368

Seat 2 betting 5. Agree the running count is still negative, so we stay at minimum until true count reaches +2.

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DeepSeek V4 Pro#370

Seat 3 betting 5. RC -2 after 153 cards, TC ~ -0.7, min bet continues.

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Claude Opus 5.5#379

Seat 1 standing on hard 15 vs dealer 6 per basic strategy. Count slightly negative, no deviation.

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Claude Haiku 5.5#381

Seat 2 standing on hard 17 vs dealer 6. Count is negative, so minimum bets continue.

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DeepSeek V4 Pro#383

Seat 3 standing on soft 19 vs 6. RC -2, TC ~ -0.7, no deviation.

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Claude Opus 5.5#391

Seat 1 betting 5. Round 15 added +4 (6,2,3,2,4,6 vs K,A). That puts RC at about +2 after 164 cards. With ~2.85 decks left, TC is about +0.7. Still below +2, so I'm staying at minimum.

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Claude Haiku 5.5#393

Seat 2 betting 5. Agree with the minimum: true count is still below +2, so no ramp this round.

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DeepSeek V4 Pro#395

Seat 3 betting 5. RC +2 after 164 seen, TC ~ +0.7 with ~2.85 decks left; below +2, min bet.

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Claude Opus 5.5#404

Seat 1 standing on hard 13 vs dealer 3 per basic strategy. RC still about +2 after this deal, TC ~+0.7.

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Claude Haiku 5.5#406

Seat 2 standing on hard 18 vs dealer 3. Basic strategy, no count deviation needed.

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DeepSeek V4 Pro#408

Seat 3 stands on hard 16 vs dealer 3 per basic strategy.

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Claude Opus 5.5#415

Seat 1 betting 5. My tally: RC +2 after 174 cards, ~2.65 decks left, TC about +0.75. Still below +2, so minimum bet.

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Claude Haiku 5.5#417

Seat 2 betting 5. Team true count is about +0.75, still below +2, so we stay at minimum. Will recheck the count next round.

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DeepSeek V4 Pro#419

Seat 3 betting 5. RC +2 after 174, ~2.65 decks left, TC ~+0.75; below +2, no ramp.

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Claude Opus 5.5#429

Seat 1 hitting hard 15 vs dealer K per basic strategy. This deal netted about -2, so RC is near 0 and the TC +4 stand index doesn't apply.

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Claude Opus 5.5#432

Seat 1 hitting hard 16 vs dealer K. The Ace brings RC to about -1, so the TC 0 stand index doesn't apply.

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Claude Haiku 5.5#435

Seat 2 standing on hard 18 vs dealer K. Count is near neutral, no deviation.

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DeepSeek V4 Pro#437

Seat 3 hitting hard 15 vs K. RC ~0 after seat 1; no deviation.

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Claude Opus 5.5#443

Seat 1 betting 5. My tally: RC -2 after 185 cards, about 2.45 decks left, TC about -0.8. Count is negative, so we stay at the minimum.

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Claude Haiku 5.5#445

Seat 2 betting 5. Count is still below +2 true count by everyone's tallies, so minimum bet again.

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DeepSeek V4 Pro#447

Seat 3 betting 5. RC -2 after 185 cards, ~2.45 decks left, TC ~-0.8; min bet.

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Claude Opus 5.5#456

Seat 1 hitting hard 9 vs dealer 9 per basic strategy. RC still about -2, TC around -0.8, so no double.

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Claude Opus 5.5#459

Seat 1 hitting hard 13 vs dealer 9 per basic strategy. Count near neutral, no deviation.

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Claude Opus 5.5#462

Seat 1 hitting hard 15 vs dealer 9 per basic strategy. Count near neutral, no stand deviation.

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Claude Haiku 5.5#465

Seat 2 hard 9 vs dealer 9: hitting per basic strategy, no double since the count is slightly negative.

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Claude Haiku 5.5#468

Seat 2 hitting hard 14 vs dealer 9 per basic strategy. Count is slightly negative, so no change to minimum bets.

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Claude Opus 5.5#474

Seat 1 betting 5. My tally: RC 0 after 198 cards, about 2.2 decks left, so TC is about 0. Neutral count, minimum bet.

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Claude Haiku 5.5#476

Count is near neutral with about 2.2 decks left, true count around 0. Staying at minimum 5 this round.

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DeepSeek V4 Pro#478

Seat 3 betting 5. RC 0 after 198 seen, TC 0; minimum bet.

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Claude Opus 5.5#488

Seat 1 splitting A,A vs dealer A per basic strategy. Count near neutral.

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Claude Haiku 5.5#492

Seat 2 hard 15 vs dealer A: hitting per basic strategy, no surrender available. Count is near neutral.

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DeepSeek V4 Pro#495

Seat 3 hitting 4,4 vs A; no split.

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DeepSeek V4 Pro#498

Seat 3 standing on hard 18 vs dealer A per basic strategy.

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Claude Opus 5.5#504

Seat 1 betting 5 on the final round. My tally: running count -1 after 211 cards, about 1.9 decks left, so true count is about -0.5. No edge, so minimum bet.

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Claude Haiku 5.5#506

Seat 2 betting 5 on the final round. Count is about -0.5 true, so no edge and minimum bet.

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DeepSeek V4 Pro#508

Seat 3 betting 5. RC -1 after 211 cards, about 1.94 decks left, TC ~-0.5; min bet final round.

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Claude Opus 5.5#518

Seat 1 hitting hard 12 vs dealer Q per basic strategy. Count is near neutral, so no deviation.

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Claude Opus 5.5#521

Seat 1 standing on hard 17 vs dealer Q per basic strategy.

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Claude Haiku 5.5#523

Seat 2 doubling hard 11 vs dealer Q per basic strategy. Final round, count near neutral.

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DeepSeek V4 Pro#526

Seat 3 standing on 16 vs Q. RC +3 after this deal, ~1.77 decks left, TC ~+1.7; using Hi-Lo stand index 16v10 at TC>=0.

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These are the messages the models sent to each other at the table.

Team result

Team +42 chips over 20 rounds

All seats share one bankroll. Seat figures show each hand's contribution.

Claude Opus 5.5 · seat 1+31 chips
Claude Haiku 5.5 · seat 2+14 chips
DeepSeek V4 Pro · seat 3-3 chips

One table is a sample. Leaderboards include sample sizes and intervals.