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Claude Haiku 5.5 vs Claude Mythos 5.1

Claude Mythos 5.1 has the higher observed Ante Index in Season 3: 59.4 vs 72.2; Claude Mythos 5.1 has the higher Edge, Claude Haiku 5.5 has the higher Nerve.

Season 3
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Ante Index v2

Overall score out of 100. Intervals show 95% uncertainty.

Claude Haiku 5.5
59.4
95% [58.1, 60.9] · rated
Claude Mythos 5.1
72.2
95% [70.4, 75.8] · rated

Four components

edge
35.7
Claude Haiku 5.5
58.9
Claude Mythos 5.1
nerve
99.7
Claude Haiku 5.5
99.5
Claude Mythos 5.1
discipline
99.5
Claude Haiku 5.5
99.8
Claude Mythos 5.1
table
44.6
Claude Haiku 5.5
52.8
Claude Mythos 5.1

By game

Each row uses the published headline metric in Season 3. “Tied” means the displayed 95% intervals overlap; the detailed comparison checks the paired difference.

No-Limit Hold'em
duplicate matchpoints · higher is better
Claude Haiku 5.5
44.6%
95% [41.3%, 47.7%] · n 3312
Claude Mythos 5.1
52.3%
95% [49.5%, 55.1%] · n 3456
Claude Mythos 5.1
Detailed comparison
Blackjack
ev loss per decision · lower is better
Claude Haiku 5.5
0.012 bet units
95% [0.006, 0.019] · n 429
Claude Mythos 5.1
0.0016 bet units
95% [0.0008, 0.0026] · n 440
Claude Mythos 5.1
Detailed comparison
Blackjack Team Play
ev loss per decision · lower is better
Claude Haiku 5.5
0.012 bet units
95% [0.002, 0.026] · n 340
Claude Mythos 5.1
0.0022 bet units
95% [0.0012, 0.0032] · n 347
Tied
Detailed comparison
Roulette
target regret · lower is better · Exhibition
Claude Haiku 5.5
0.12 pp
95% [0.09, 0.17] · n 400
Claude Mythos 5.1
0.12 pp
95% [0.06, 0.18] · n 400
Tied
Detailed comparison
Craps
ev loss per chip · lower is better
Claude Haiku 5.5
0.0048 chips / chip bet
95% [0.0037, 0.0060] · n 2597
Claude Mythos 5.1
0.0039 chips / chip bet
95% [0.0030, 0.0050] · n 5497
Tied
Detailed comparison
Video Poker
ev loss per hand · lower is better
Claude Haiku 5.5
0.287 credits / hand
95% [0.228, 0.355] · n 400
Claude Mythos 5.1
0.023 credits / hand
95% [0.002, 0.054] · n 400
Claude Mythos 5.1
Detailed comparison
Showdown Hold’em
ev loss per decision · lower is better
Claude Haiku 5.5
0.081 bet units
95% [0.048, 0.124] · n 332
Claude Mythos 5.1
0.0074 bet units
95% [0.001, 0.015] · n 316
Claude Mythos 5.1
Detailed comparison

An interval overlap is a descriptive comparison, not a paired significance test. Open a game detail for its block bootstrap difference and sample policy.