Blackjack Team Play · 20 rounds · Oct 14, 2026, 8:51 AM UTC
Self team: one model plays all three seats against the dealer.
1 of 129 decisions were server fallbacks
Self team: one model plays all three seats against the dealer.
645 / 645
Action timeline
Stated reasons appear after the comparison block is revealed. They are model-submitted text, not verified reasoning.
Agent table chat
Chat on
Claude Sonnet 5#1
Starting conservative at 10 chips round 1, no data yet. Let's track true count and ramp bets with favorable shoe.
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Claude Sonnet 5#3
Matching at 10 to start. Fresh shoe, no count edge yet—will scale with teammates as true count rises.
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Claude Sonnet 5#5
Starting at 10 as well, fresh shoe no edge yet. Will track count and scale together.
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Claude Sonnet 5#17
Count is slightly negative (-2 running) after 8 cards, staying at 10 to match team baseline.
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Claude Sonnet 5#19
Agreed, -2 running after 8 cards, true count still near zero. Staying at 10 baseline.
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Claude Sonnet 5#21
Matching at 10, count near neutral, staying with team baseline.
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Claude Sonnet 5#30
Doubling my 11 vs dealer 4, standard basic strategy play.
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Claude Sonnet 5#33
Hard 6 vs dealer 4, just hitting per basic strategy—too low to double.
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Claude Sonnet 5#36
Standing on hard 15 vs dealer 4, basic strategy says stand on weak dealer upcard.
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Claude Sonnet 5#43
Running count back to 0 after 20 cards, true count neutral. Staying at 10 baseline.
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Claude Sonnet 5#45
Count back to neutral (RC 0) after 20 cards, true count ~0. Staying at 10 baseline with team.
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Claude Sonnet 5#47
Agreed, RC 0 after 20 cards, true count neutral. Staying at 10 baseline.
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Claude Sonnet 5#56
Doubling my 11 vs dealer 7, standard basic strategy play.
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Claude Sonnet 5#59
Doubling hard 8 vs dealer 7, standard basic strategy play.
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Claude Sonnet 5#62
Soft 13 vs dealer 7, hitting per basic strategy.
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Claude Sonnet 5#65
Hard 13 vs dealer 7, hitting per basic strategy.
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Claude Sonnet 5#71
RC ~+1 after 32 cards, true count near neutral (~0.2). Staying at 10 baseline.
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Claude Sonnet 5#73
Agree, RC +1 after 32 cards, TC ~0.2, basically neutral. Staying at 10 baseline.
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Claude Sonnet 5#75
Agreed, RC ~+1 after 32 cards, TC ~0.2, near neutral. Staying at 10 baseline.
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Claude Sonnet 5#84
Standing on hard 17 vs dealer 3, basic strategy.
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Claude Sonnet 5#86
Standing on hard 17 vs dealer 3, basic strategy.
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Claude Sonnet 5#88
Standing on hard 18 vs dealer 3, basic strategy.
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Claude Sonnet 5#94
RC ~-1 after 41 cards, TC ~-0.2, still neutral. Staying at 10 baseline.
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Claude Sonnet 5#96
RC -1 after 41 cards, TC ~-0.2, still neutral. Staying at 10 baseline.
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Claude Sonnet 5#98
Agreed, staying at 10 baseline with neutral count.
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Claude Sonnet 5#107
Standing on hard 19 vs dealer 8, basic strategy.
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Claude Sonnet 5#109
Hard 12 vs dealer 8, hitting per basic strategy.
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Claude Sonnet 5#112
Standing on hard 20 vs dealer 8, basic strategy.
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Claude Sonnet 5#118
RC ~-1 after 51 cards, TC ~-0.2, still neutral. Staying at 10 baseline.
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Claude Sonnet 5#120
Confirmed RC -1 after 51 cards, TC ~-0.2, still neutral. Staying at 10 baseline.
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Claude Sonnet 5#122
Agreed, RC ~-1 after 51 cards, TC ~-0.2, staying at 10 baseline.
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Claude Sonnet 5#132
Hard 15 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#135
Standing on hard 18 vs dealer 10, basic strategy says stand here.
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Claude Sonnet 5#137
Hard 13 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#140
Standing on hard 19 vs dealer 10, basic strategy.
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Claude Sonnet 5#145
RC ~-4 after 61 cards, ~3.6 decks left, TC ~-1.1 (unfavorable). Dropping to table minimum 5 until count turns positive.
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Claude Sonnet 5#147
Agreed, RC ~-4 after 61 cards, TC negative with ~4.8 decks left—dropping to minimum 5 until count improves.
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Claude Sonnet 5#149
Agreed, count unfavorable, dropping to minimum 5 with team.
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Claude Sonnet 5#158
Standing on hard 19 vs dealer 2, basic strategy.
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Claude Sonnet 5#160
Standing on hard 19 vs dealer 2, basic strategy.
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Claude Sonnet 5#162
Standing on hard 15 vs dealer 2, basic strategy.
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Claude Sonnet 5#171
RC ~-3 after ~73 cards, ~4.6 decks left, TC ~-0.65, still unfavorable. Staying at minimum 5.
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Claude Sonnet 5#173
Confirmed RC -3 after 72 cards, TC ~-0.65, still unfavorable. Staying at minimum 5 with team.
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Claude Sonnet 5#175
Confirmed RC -3 after 73 cards, TC ~-0.65, still unfavorable. Staying at minimum 5 with team.
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Claude Sonnet 5#185
Soft 15 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#188
Hard 13 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#191
Standing on hard 17 vs dealer 10, basic strategy.
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Claude Sonnet 5#193
Standing on soft 20 vs dealer 10, basic strategy.
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Claude Sonnet 5#195
Standing on hard 17 vs dealer 10, basic strategy.
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Claude Sonnet 5#200
RC ~-6 after 83 cards, ~4.4 decks remaining, TC ~-1.4, still unfavorable. Staying at minimum 5.
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Claude Sonnet 5#202
Agreed, RC ~-6 after 83 cards, TC ~-1.4, still unfavorable. Staying at minimum 5 with team.
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Claude Sonnet 5#204
Agreed, RC ~-6 after 83 cards, TC ~-1.4, unfavorable. Staying at minimum 5 with team.
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Claude Sonnet 5#214
Hard 12 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#217
Standing on hard 19 vs dealer 10, basic strategy.
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Claude Sonnet 5#219
Standing on hard 20 vs dealer 10, basic strategy.
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Claude Sonnet 5#221
Standing on hard 20 vs dealer 10, basic strategy.
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Claude Sonnet 5#226
RC ~-13 after 90 cards, ~4.3 decks left, TC ~-3.0, very unfavorable. Staying at minimum 5.
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Claude Sonnet 5#228
Confirmed deep negative RC (~-14) after 90 cards, TC ~-3.3 with ~4.3 decks left—staying at minimum 5 until count recovers.
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Claude Sonnet 5#230
Agreed, deep negative count, staying at minimum 5 until it recovers.
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Claude Sonnet 5#239
Doubling hard 10 vs dealer 3, standard basic strategy play.
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Claude Sonnet 5#242
Doubling hard 10 vs dealer 3, standard basic strategy play.
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Claude Sonnet 5#245
Standing on hard 18 vs dealer 3, basic strategy.
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Claude Sonnet 5#253
RC is back to about -1 after ~105 cards, decks left ~4.0, TC ~-0.25 — essentially neutral again after the deep dip. Moving back up to our 10-chip baseline.
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Claude Sonnet 5#255
Agreed, back to neutral TC ~-0.25, moving to 10 baseline with team.
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Claude Sonnet 5#257
Agreed, RC ~-1 after ~105 cards, TC near neutral. Moving back to 10 baseline with team.
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Claude Sonnet 5#266
Hard 15 vs dealer 7, hitting per basic strategy.
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Claude Sonnet 5#269
Standing on hard 20 vs dealer 7, basic strategy.
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Claude Sonnet 5#271
Hard 12 vs dealer 7, hitting per basic strategy.
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Claude Sonnet 5#274
Standing on hard 20 vs dealer 7, basic strategy.
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Claude Sonnet 5#281
RC ~-2 after 117 cards, ~3.75 decks left, TC ~-0.5 — mildly unfavorable but close to neutral. Staying at our 10 baseline.
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Claude Sonnet 5#283
Agreed, TC ~-0.5 near neutral, staying at 10 baseline with team.
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Claude Sonnet 5#285
Agreed, TC ~-0.5 near neutral, staying at 10 baseline with team.
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Claude Sonnet 5#294
Standing on hard 15 vs dealer 4, basic strategy.
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Claude Sonnet 5#296
Doubling hard 10 vs dealer 4, standard basic strategy play.
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Claude Sonnet 5#303
RC ~-3 after 127 cards, ~3.6 decks left, TC ~-0.84 — mildly unfavorable but close to neutral. Staying at 10 baseline with team.
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Claude Sonnet 5#305
Agreed, TC ~-0.84 near neutral, staying at 10 baseline with team.
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Claude Sonnet 5#307
Agreed, TC ~-0.84 near neutral, staying at 10 baseline with team.
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Claude Sonnet 5#316
Hard 12 vs dealer 9, hitting per basic strategy.
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Claude Sonnet 5#319
Hard 16 vs dealer 9, hitting per basic strategy.
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Claude Sonnet 5#322
Doubling hard 11 vs dealer 9, standard basic strategy play.
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Claude Sonnet 5#328
RC ~-1 after 138 cards, ~3.35 decks left, TC ~-0.3 — essentially neutral. Staying at 10 baseline with team.
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Claude Sonnet 5#330
Agreed, TC ~-0.3 near neutral, staying at 10 baseline with team.
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Claude Sonnet 5#332
Agreed, TC ~-0.3 near neutral, staying at 10 baseline with team.
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Claude Sonnet 5#341
Standing on hard 13 vs dealer 5, basic strategy says stand vs weak upcard.
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Claude Sonnet 5#343
Splitting 3s vs dealer 5, standard basic strategy with DAS allowed.
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Claude Sonnet 5#347
Doubling soft 14 (A-3) vs dealer 5, standard basic strategy with DAS.
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Claude Sonnet 5#350
Hard 13 vs dealer 5, standing per basic strategy on this split hand.
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Claude Sonnet 5#352
Doubling hard 13 vs dealer 5, standard basic strategy play.
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Claude Sonnet 5#360
RC +6 after ~152 cards seen, ~1.9 decks left (98 cards), TC ~+3.2 — strongly favorable. Let's ramp up together, I'm betting 25.
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Claude Sonnet 5#362
Agreed, TC ~+3.2 is strongly favorable—matching at 25 to ramp with the team.
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Claude Sonnet 5#364
Agreed, TC ~+3.2 is strongly favorable—matching at 25 with the team.
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Claude Sonnet 5#373
Standing on hard 16 vs dealer 3, basic strategy.
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Claude Sonnet 5#375
Standing on hard 16 vs dealer 3, basic strategy.
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Claude Sonnet 5#377
Standing on hard 17 vs dealer 3, basic strategy.
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Claude Sonnet 5#384
RC +8 after 162 cards, ~2.9 decks left, TC ~+2.8 — still strongly favorable, holding at 25 with the team.
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Claude Sonnet 5#386
Agreed, holding at 25 with TC ~+2.8, still favorable.
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Claude Sonnet 5#388
Agreed, TC still ~+2.8, holding at 25 with the team.
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Claude Sonnet 5#397
Standing on soft 20 vs dealer 9, basic strategy.
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Claude Sonnet 5#399
Hard 9 vs dealer 9, hitting per basic strategy since double range is only 2-6.
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Claude Sonnet 5#402
Standing on hard 19 vs dealer 9, basic strategy.
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Claude Sonnet 5#404
Hard 16 vs dealer 9, hitting per basic strategy.
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Claude Sonnet 5#411
RC +7 after 172 cards, ~2.7 decks left, TC ~+2.6 — still favorable, holding at 25 with the team.
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Claude Sonnet 5#413
Agreed, TC ~+2.6, holding at 25 with the team.
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Claude Sonnet 5#423
Soft 16 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#426
Hard 13 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#429
Hard 14 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#432
Standing on hard 20 vs dealer 10, basic strategy.
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Claude Sonnet 5#434
Hard 16 vs dealer 10, hitting per basic strategy.
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Claude Sonnet 5#440
RC +7 after 184 cards, ~2.46 decks left, TC ~+2.85 — still strongly favorable. Holding at 25 with the team as we approach shoe end.
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Claude Sonnet 5#442
Agreed, holding at 25 with TC ~+2.85, still favorable as we approach shoe end.
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Claude Sonnet 5#444
Agreed, TC still ~+2.8 favorable, holding at 25 with the team.
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Claude Sonnet 5#453
Doubling soft 16 (A-5) vs dealer 4, standard basic strategy play.
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Claude Sonnet 5#456
Standing on hard 14 vs dealer 4, basic strategy says stand vs weak upcard.
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Claude Sonnet 5#458
Standing on hard 20 vs dealer 4, basic strategy.
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Claude Sonnet 5#464
RC ~+5 after 194 cards, decks left ~2.27, TC ~+2.2 — still favorable though cooling a bit. Holding at 25 with the team for these final rounds before cut.
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Claude Sonnet 5#466
Agreed, TC ~+2.2 still favorable with only 2 rounds left. Holding at 25 with the team.
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Claude Sonnet 5#468
Agreed, holding at 25 with TC ~+2.2, favorable for these last two rounds.
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Claude Sonnet 5#477
Doubling hard 11 vs dealer 8, standard basic strategy play.
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Claude Sonnet 5#480
Hard 14 vs dealer 8, hitting per basic strategy.
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Claude Sonnet 5#483
Standing on hard 18 vs dealer 8, basic strategy.
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Claude Sonnet 5#485
Soft 14 vs dealer 8, hitting per basic strategy.
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Claude Sonnet 5#488
Soft 17 vs dealer 8, hitting per basic strategy.
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Claude Sonnet 5#491
Standing on hard 17 vs dealer 8, basic strategy.
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Claude Sonnet 5#497
Final round, TC still mildly positive per our running count. Holding at 25 with the team to close out the shoe.
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Claude Sonnet 5#499
Agreed, final round with TC still mildly positive—holding at 25 with the team.
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Claude Sonnet 5#501
Agreed, final round, count still mildly positive overall. Matching at 25 to close out the shoe with the team.
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Claude Sonnet 5#510
Standing on hard 18 vs dealer 2, basic strategy.
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Claude Sonnet 5#512
Standing on hard 15 vs dealer 2, basic strategy.
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These are the messages the models sent to each other at the table.
Team result
Team -28 chips over 20 rounds
All seats share one bankroll. Seat figures show each hand's contribution.
Claude Sonnet 5 · seat 1+20 chips
Claude Sonnet 5 · seat 2-95 chips
Claude Sonnet 5 · seat 3+47 chips
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