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Blackjack Team Play table

Blackjack Team Play · 20 rounds · Sep 28, 2026, 9:29 AM UTC

Mixed team: three different models share one bankroll.

17 of 135 decisions were server fallbacks

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Mixed team: three different models share one bankroll.

651 / 651

Action timeline

Model's stated reason

A fresh 6-deck shoe with these rules has a small house edge, so the minimum bet minimizes expected loss until the count favors us.

Model's stated reason

A fresh six-deck shoe has no count-based edge, so the minimum bet minimizes expected loss while preserving bankroll for favorable counts.

Model's stated reason

Pair of 2s vs dealer 7 is a basic-strategy split. The exposed count is only mildly positive, so no deviation needed.

Model's stated reason

Basic strategy says hit hard 12 vs 7; the count is only slightly positive and not high enough to justify standing.

Model's stated reason

Basic strategy dictates hitting hard 16 against a dealer 7; the running count is only slightly positive, not enough to deviate.

Model's stated reason

Running count +6 over about 5.7 remaining decks gives a true count near +1, which is roughly break-even. A slight bump above the minimum is fine.

Model's stated reason

The running count is +6, but the true count is only around +1 early in a six-deck shoe. A small increase above minimum is appropriate.

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, neutral count. Betting min until the running count (Hi-Lo) goes positive; let's ramp up bets when true count >= +2.

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GPT-5.6 Terra#3

Agree—starting at table minimum on the neutral fresh shoe. I’ll track Hi-Lo and increase only once the true count supports it.

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DeepSeek V4 Flash 0731#5

Betting min as well, will follow the count.

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Claude Opus 5.5#14

Hitting 13 vs dealer 7 per basic strategy. Running count so far: +3 (K,Q -2; 3,2,2,2 +4; 7 neutral).

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GPT-5.6 Terra#17

Hit 12 vs 7. Count correction: exposed Hi-Lo is +2 (K,Q = -2; 3 and three 2s = +4; 8,7 neutral).

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GPT-5.6 Terra#20

Standing on hard 18 vs 7. Current exposed Hi-Lo running count is +3 after all revealed cards.

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DeepSeek V4 Flash 0731#22

Splitting 2s vs 7 per basic strategy.

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DeepSeek V4 Flash 0731#26

Hitting hard 12 vs dealer 7 per basic strategy.

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DeepSeek V4 Flash 0731#29

Hitting hard 14 vs dealer 7 per basic strategy.

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DeepSeek V4 Flash 0731#32

Hitting 16 vs 7 per basic strategy.

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DeepSeek V4 Flash 0731#35

Standing on 20.

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Claude Opus 5.5#43

Hi-Lo RC +6 after 17 cards (TC about +1). Near-neutral edge, so I'm betting a small 10. Ramp to bigger bets at TC +2 or higher.

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GPT-5.6 Terra#45

RC +6 over 17 exposed cards; TC is about +1 with nearly six decks remaining. I’m betting 10, keeping the larger ramp for TC +2 or better.

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Claude Opus 5.5#55

Hitting soft 13 vs 8 per basic strategy. My Hi-Lo RC is +8 after 24 cards, so TC is about +1.5.

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Claude Opus 5.5#58

Hitting hard 13 vs 8 per basic strategy. The Hi-Lo running count is +7 after 25 cards, so the true count is about +1.3.

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Claude Opus 5.5#61

Standing on hard 19 vs 8. Hi-Lo RC +6 after 26 cards seen (TC about +1).

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GPT-5.6 Terra#63

Hitting hard 13 vs 8. Hi-Lo RC remains +6 after 26 exposed cards (TC about +1).

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DeepSeek V4 Flash 0731#66

Hitting 13 vs 8; Hi-Lo RC +7 after 27 cards (TC ~+1.6).

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Claude Opus 5.5#73

Hi-Lo RC +7 after 30 cards, about 5.4 decks left, so TC is about +1.3. That's a slight edge at best, so I'm betting 15. Ramp up at TC +2 or better.

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GPT-5.6 Terra#75

Hi-Lo RC +7 after 30 cards; about 5.4 decks remain, TC roughly +1.3. Betting 15 for the modest positive count.

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Claude Opus 5.5#85

Standing on hard 14 vs 3 per basic strategy. Hi-Lo RC +9 after 37 cards, ~5.3 decks left, TC about +1.7.

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GPT-5.6 Terra#87

Standing hard 13 vs 3. Hi-Lo RC is +9 after 37 exposed cards (TC about +1.7).

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DeepSeek V4 Flash 0731#89

Standing 13 vs 3; RC +9, TC ~1.7.

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Claude Opus 5.5#96

Hi-Lo RC +10 after 40 cards, ~5.2 decks left, TC about +1.9. Small edge now, so I'm betting 25. Go bigger (40-50) at TC +3 or better.

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GPT-5.6 Terra#98

Confirmed Hi-Lo RC +10 after 40 exposed cards; roughly 5.2 decks remain, TC about +1.9. Betting 25 for the modest positive edge.

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Claude Opus 5.5#108

Standing on hard 20 vs 7. Splitting tens vs 7 is wrong at any count. My Hi-Lo RC is +7 after 47 cards, ~5.1 decks left, TC about +1.4.

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GPT-5.6 Terra#110

Hitting hard 15 vs 7 per basic strategy. Exposed Hi-Lo count is roughly +8 after the initial deal.

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GPT-5.6 Terra#113

Standing on hard 18 vs 7. Current exposed Hi-Lo RC is about +8 after the 48 shown cards.

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DeepSeek V4 Flash 0731#115

Standing on 20.

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Claude Opus 5.5#121

Hi-Lo RC +8 after 50 cards, ~5.0 decks left, TC about +1.6. Slight edge only, so I'm betting 20. Ramp to 40-50 at TC +3 or better.

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GPT-5.6 Terra#123

Hi-Lo RC +8 after 50 cards; about 5.0 decks remain, so TC is roughly +1.6. Slight edge: betting 20.

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Claude Opus 5.5#134

Hitting hard 13 vs dealer 10 per basic strategy. Hi-Lo RC is about +6 after 57 cards, ~4.9 decks left, so TC is about +1.2.

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GPT-5.6 Terra#137

Hitting hard 12 vs 10. Exposed count is not high enough for the 12-vs-10 stand deviation.

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GPT-5.6 Terra#140

Standing on hard 18 versus the dealer 10.

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DeepSeek V4 Flash 0731#142

Standing on 20.

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Claude Opus 5.5#148

Hi-Lo RC +7 after 61 cards, ~4.8 decks left, TC about +1.5. Slight edge, betting 20. Ramp to 40-50 at TC +3 or better.

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GPT-5.6 Terra#150

Confirmed Hi-Lo RC +7 after 61 cards; about 4.8 decks remain, TC roughly +1.5. Slight positive edge, so betting 20.

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Claude Opus 5.5#160

Standing on hard 13 vs dealer 6 per basic strategy. Hi-Lo RC about +9 after 68 cards, ~4.7 decks left, TC about +1.9.

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GPT-5.6 Terra#162

Standing hard 12 vs 6 per basic strategy. With the exposed cards, Hi-Lo RC is about +9 after 68 cards (TC roughly +1.9).

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DeepSeek V4 Flash 0731#164

Standing on 13 vs dealer 6; weak upcard, let the dealer bust.

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Claude Opus 5.5#170

Hi-Lo RC +10 after 70 cards, ~4.65 decks left, TC about +2.1. Small edge now (~0.5%), betting 30. Ramp to 40-50 at TC +3 or better.

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GPT-5.6 Terra#172

Confirmed Hi-Lo RC +10 after 70 cards; about 4.65 decks remain, TC roughly +2.1. Betting 30 for the modest positive edge.

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Claude Opus 5.5#182

Standing on hard 20 vs 2; no ten-split here. Hi-Lo RC about +9 after 77 cards, roughly 4.5 decks left, so TC is about +2.

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GPT-5.6 Terra#184

Standing on hard 14 versus 2 per basic strategy.

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Claude Opus 5.5#191

Hi-Lo RC +8 after 79 cards, about 4.5 decks left, so TC is about +1.8. That's a slight edge, so I'm betting 25. Ramp to 40-50 at TC +3 or better.

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GPT-5.6 Terra#193

Hi-Lo RC +8 after 79 exposed cards; roughly 4.5 decks remain, so TC is about +1.8. Slight positive edge: betting 25.

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Claude Opus 5.5#203

Standing on hard 19 vs dealer 3. Hi-Lo RC about +7 after 86 cards, ~4.4 decks left, TC about +1.6.

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GPT-5.6 Terra#205

Doubling hard 10 versus dealer 3 per basic strategy; exposed Hi-Lo RC is about +7.

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Claude Opus 5.5#214

Hi-Lo RC +10 after 91 cards, ~4.25 decks left, TC about +2.4. Modest edge, betting 30. Ramp to 40-50 at TC +3 or better.

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GPT-5.6 Terra#216

Confirmed RC +10 after 91 exposed cards; about 4.25 decks remain, so TC is roughly +2.4. Betting 30 for the modest positive edge.

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Claude Opus 5.5#227

Standing on soft 18 vs dealer 10. Hitting and standing are close here, but the high positive count favors standing. Hi-Lo RC is about +10 after 98 cards, ~4.2 decks left, TC about +2.4.

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GPT-5.6 Terra#229

Hitting soft 14 versus dealer 10. Hi-Lo RC remains about +10 after the initial deal, roughly TC +2.4.

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GPT-5.6 Terra#232

Hitting hard 12 vs dealer 10; TC is only about +2.4, below the 12-vs-10 stand index.

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GPT-5.6 Terra#235

Standing on hard 17 versus dealer 10; basic strategy and the count do not justify a hit.

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Claude Opus 5.5#241

Hi-Lo RC +9 after 101 cards, ~4.05 decks left, TC about +2.2. Modest edge, so I'm betting 30. We ramp to 40-50 at TC +3 or better.

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GPT-5.6 Terra#243

Hi-Lo RC +9 after 101 exposed cards; about 4.05 decks remain, TC roughly +2.2. Betting 30 for the modest positive edge.

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Claude Opus 5.5#253

Standing on hard 15 vs dealer 4 per basic strategy. Hi-Lo RC is about +14 after 108 cards, roughly 3.9 decks left, so TC is about +3.6. We should ramp to 40-50 next round.

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GPT-5.6 Terra#255

Hitting hard 7 vs 4. Initial deal raises Hi-Lo RC to about +14 (~TC +3.6); next-round ramp remains warranted.

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GPT-5.6 Terra#258

Standing on hard 17 vs 4. Exposed count remains strongly positive; preserve the dealer-bust advantage.

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DeepSeek V4 Flash 0731#260

Doubling 10 vs 4; count is positive.

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Claude Opus 5.5#268

My recount: Hi-Lo RC +12 after 113 cards, ~3.8 decks left, TC about +3.1. That's above our +3 trigger, so I'm betting max 50. Suggest 40-50 each.

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GPT-5.6 Terra#270

Recount supports RC about +12 with roughly 3.8 decks remaining (TC just above +3). I’m betting 50.

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DeepSeek V4 Flash 0731#272

RC +12, TC ~3.1. Betting max 50.

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GPT-5.6 Terra#282

Hitting soft 14 versus the dealer 10; no applicable count deviation.

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GPT-5.6 Terra#285

Hitting hard 14 versus dealer 10; even at the positive count this remains a hit.

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GPT-5.6 Terra#288

Standing on hard 18 versus dealer 10.

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Claude Opus 5.5#293

My recount: Hi-Lo RC +6 after 123 cards, ~3.6 decks left, so TC is about +1.6. Aces are running a bit short (11 of 24 gone). The edge is now small, so I'm betting 20. Suggest 15-25 until TC is back to +3.

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GPT-5.6 Terra#295

Recount agrees RC about +6 after 123 cards (~3.6 decks, TC +1.6). Small edge despite ace depletion; betting 20.

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Claude Opus 5.5#306

Standing on hard 20 vs dealer Ace. No ten-split at this count. Count is still modestly positive after this deal.

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GPT-5.6 Terra#308

Hitting hard 10 vs Ace; count after the deal is well below the 10-vs-A double index.

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GPT-5.6 Terra#311

Standing on hard 20 versus the Ace.

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DeepSeek V4 Flash 0731#313

Hitting soft 14 vs Ace per basic strategy.

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DeepSeek V4 Flash 0731#316

Hitting hard 14 vs Ace; TC ~+1.6 isn't high enough to deviate from basic strategy.

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Claude Opus 5.5#322

Recount: Hi-Lo RC +2 after 134 cards, ~3.4 decks left, so TC is about +0.6. Aces are depleted (13 of 24 gone). No real edge, so I'm betting min 5. Suggest min bets until TC is +2 or higher.

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GPT-5.6 Terra#324

RC is about +2 with roughly 3.4 decks left (TC below +1), and aces remain depleted. I’m betting the 5-chip minimum until the count improves.

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DeepSeek V4 Flash 0731#326

Agree: RC +2, about 3.4 decks left, TC ~0.6. Betting min 5.

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Claude Opus 5.5#336

Standing on hard 17 vs 10 per basic strategy. Count is near neutral after this deal.

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GPT-5.6 Terra#338

Hitting hard 13 versus dealer 10 per basic strategy; the exposed count has fallen back near neutral.

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GPT-5.6 Terra#341

Hitting hard 14 versus dealer 10; the count is now near/under neutral, so no stand deviation.

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GPT-5.6 Terra#344

Standing on hard 18 versus the dealer 10; the count remains far below any aggressive deviation.

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DeepSeek V4 Flash 0731#346

Hitting 16 vs dealer 10; count is near neutral so no stand deviation.

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Claude Opus 5.5#353

Recount: Hi-Lo RC 0 after 146 cards, ~3.2 decks left, TC ~0. Aces heavily depleted (about 15 of 24 gone). No edge, so I'm betting min 5. Suggest min bets until TC is +2 or better.

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GPT-5.6 Terra#355

RC is about 0 with roughly 3.2 decks left, and aces remain depleted; betting the 5-chip minimum until the count improves.

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DeepSeek V4 Flash 0731#357

Agree RC 0 with aces depleted; staying at min 5 until the count improves.

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Claude Opus 5.5#366

Standing on hard 17 vs dealer 6 per basic strategy. Count near neutral after this deal.

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GPT-5.6 Terra#368

Standing on hard 15 versus dealer 6; dealer bust probability makes this the correct basic-strategy play.

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Claude Opus 5.5#374

Recount: Hi-Lo RC -3 after 155 cards, ~3 decks left, TC about -1. Aces are heavily depleted (~17 of 24 gone). Negative edge, so I'm betting min 5. Suggest min bets until TC reaches +2.

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GPT-5.6 Terra#376

Agreed: RC about -3 with roughly 3 decks remaining and aces depleted; betting the 5-chip minimum.

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DeepSeek V4 Flash 0731#378

Agree RC -3, aces depleted; staying at min 5.

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Claude Opus 5.5#387

Standing on hard 16 vs dealer 4 per basic strategy. Hi-Lo RC is still about -3 after this deal (~3 decks left), so it's min bets for now.

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GPT-5.6 Terra#389

Standing hard 18 vs dealer 4. Initial exposed cards leave the Hi-Lo running count around -3, so the minimum-bet approach remains appropriate.

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DeepSeek V4 Flash 0731#391

Standing 16 vs 4 per basic strategy; count still negative, staying at min bets.

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Claude Opus 5.5#397

Hi-Lo RC still about -3 after 164 cards, ~2.85 decks left, TC about -1. Aces heavily depleted (~19 of 24 gone). Betting min 5; suggest min bets.

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GPT-5.6 Terra#399

RC remains about -3 with roughly 2.85 decks left and aces depleted; I’m betting the 5-chip minimum.

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DeepSeek V4 Flash 0731#401

Agree RC -3, TC ~ -1; staying at min 5.

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Claude Opus 5.5#411

Standing on hard 18 vs dealer K per basic strategy. Count still negative with aces depleted, so min bets continue.

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GPT-5.6 Terra#413

Hitting hard 12 versus dealer K; the count remains negative, far below the stand deviation.

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GPT-5.6 Terra#416

Hitting hard 15 vs K; exposed count remains negative, nowhere near the stand deviation.

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DeepSeek V4 Flash 0731#419

Hitting 15 vs K; count still negative, no deviation.

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Claude Opus 5.5#425

Recount: Hi-Lo RC about -6 after 175 cards, ~2.6 decks left, TC about -2.3, and aces are heavily depleted. Betting min 5; suggest everyone stays at min 5.

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GPT-5.6 Terra#427

RC is about -6 with roughly 2.6 decks left and aces depleted; I’m staying at the 5-chip minimum.

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Claude Opus 5.5#437

Standing on hard 18 vs dealer 5 per basic strategy. Count still negative with aces depleted, so min bets continue.

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GPT-5.6 Terra#439

Doubling soft 16 against dealer 5 per basic strategy.

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DeepSeek V4 Flash 0731#442

Standing 13 vs 5; count still negative, staying conservative.

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Claude Opus 5.5#449

Recount: Hi-Lo RC about -2 after 186 cards, ~2.4 decks left, TC about -1. 17 of 24 aces are gone, so aces are depleted. Betting min 5; suggest min 5 each.

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GPT-5.6 Terra#451

RC is about -2 with roughly 2.4 decks left and aces depleted; I’m betting the 5-chip minimum.

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Claude Opus 5.5#462

Standing on hard 20 vs dealer K. Never split tens here, especially with a negative count. Min bets continue.

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GPT-5.6 Terra#464

Standing hard 13 vs K: exposed RC is about -1 over roughly 2.3 decks (TC around -0.5), which is just above the Hi-Lo stand index for 13 vs 10.

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DeepSeek V4 Flash 0731#466

Hitting 10 vs K; negative count, no double or split here.

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DeepSeek V4 Flash 0731#469

Standing on hard 18 vs K per basic strategy.

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Claude Opus 5.5#474

Round 18 cards (Kh 9d Ts Td 9d 4c 5d 5d 8d) net to 0, so Hi-Lo RC stays about -2 after 195 cards. About 2.25 decks left, so TC is about -0.9. 17 of 24 aces are gone. Betting min 5; suggest min 5 each.

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GPT-5.6 Terra#476

RC remains about -2 with roughly 2.25 decks left (TC about -0.9) and aces depleted; betting the 5-chip minimum.

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Claude Opus 5.5#486

Doubling hard 11 vs dealer 2 per basic strategy. The count is only slightly negative and aces are depleted, which helps an 11 double.

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GPT-5.6 Terra#489

Hitting hard 12 vs 2; count is not remotely high enough for the stand deviation.

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DeepSeek V4 Flash 0731#492

Standing 15 vs dealer 2; count still slightly negative, sticking with basic strategy.

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Claude Opus 5.5#499

Round 19 cards net +3, so Hi-Lo RC is about +1 after 207 cards. With about 2 decks left, TC is about +0.5, and aces are slightly short. That's no real edge, so I'm betting min 5; suggest min 5 each for the final round.

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GPT-5.6 Terra#501

RC is about +1 with roughly two decks remaining (TC around +0.5) and aces slightly depleted; no meaningful edge. Betting the 5-chip minimum for the final round.

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Claude Opus 5.5#512

Hitting hard 15 vs dealer Ace per basic strategy. The count dropped after this deal (three aces and two tens showing), so there's no stand deviation.

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

Team result

Team -117 chips over 20 rounds

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

Claude Opus 5.5 · seat 1+30 chips
GPT-5.6 Terra · seat 2-188 chips
DeepSeek V4 Flash 0731 · seat 3+41 chips

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