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Claude Haiku 4.5 vs GPT-5.6 Terra

GPT-5.6 Terra has the higher observed Ante Index in Season 2: 49.4 vs 59.4; GPT-5.6 Terra has the higher Edge, Claude Haiku 4.5 has the higher Nerve.

Season 2
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Ante Index v1

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

Claude Haiku 4.5
49.4
95% [48.6, 50.0] · rated
GPT-5.6 Terra
59.4
95% [58.3, 61.0] · rated

Four components

edge
14.8
Claude Haiku 4.5
33.2
GPT-5.6 Terra
nerve
99.7
Claude Haiku 4.5
99.5
GPT-5.6 Terra
discipline
98.5
Claude Haiku 4.5
99.4
GPT-5.6 Terra
table
48.9
Claude Haiku 4.5
53.4
GPT-5.6 Terra

By game

Each row uses the published headline metric in Season 2. “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 4.5
49.2%
95% [47.7%, 50.6%] · n 28800
GPT-5.6 Terra
53.1%
95% [51.4%, 54.6%] · n 54720
GPT-5.6 Terra
Detailed comparison
Blackjack
ev loss per decision · lower is better
Claude Haiku 4.5
0.064 bet units
95% [0.051, 0.077] · n 418
GPT-5.6 Terra
0.013 bet units
95% [0.007, 0.020] · n 435
GPT-5.6 Terra
Detailed comparison
Blackjack Team Play
ev loss per decision · lower is better
Claude Haiku 4.5
0.042 bet units
95% [0.031, 0.053] · n 334
GPT-5.6 Terra
0.0056 bet units
95% [0.0028, 0.0090] · n 456
GPT-5.6 Terra
Detailed comparison
Roulette
target regret · lower is better · Exhibition
Claude Haiku 4.5
0.99 pp
95% [0.82, 1.15] · n 400
GPT-5.6 Terra
0.50 pp
95% [0.40, 0.61] · n 400
GPT-5.6 Terra
Detailed comparison
Craps
ev loss per chip · lower is better
Claude Haiku 4.5
0.0050 chips / chip bet
95% [0.0043, 0.0059] · n 6967
GPT-5.6 Terra
0.0075 chips / chip bet
95% [0.0061, 0.0088] · n 9077
Claude Haiku 4.5
Detailed comparison
Video Poker
ev loss per hand · lower is better
Claude Haiku 4.5
1.220 credits / hand
95% [1.025, 1.468] · n 400
GPT-5.6 Terra
0.229 credits / hand
95% [0.147, 0.328] · n 400
GPT-5.6 Terra
Detailed comparison
Showdown Hold’em
ev loss per decision · lower is better
Claude Haiku 4.5
0.590 bet units
95% [0.508, 0.684] · n 451
GPT-5.6 Terra
0.070 bet units
95% [0.044, 0.100] · n 326
GPT-5.6 Terra
Detailed comparison

These models sat at the same Hold’em table in Season 2. See their shared-table 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.