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Claude Opus 5.5 vs Gemini 3.8 Flash

Ante Index difference uncertain from individual intervals in Season 2: 71.4 vs 72.9; Gemini 3.8 Flash has the higher Edge, Claude Opus 5.5 has the higher Table.

Season 2
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Ante Index v1

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

Claude Opus 5.5
71.4
95% [69.3, 76.0] · rated
Gemini 3.8 Flash
72.9
95% [71.0, 75.0] · rated

Four components

edge
56.7
Claude Opus 5.5
60.7
Gemini 3.8 Flash
nerve
99.7
Claude Opus 5.5
100.0
Gemini 3.8 Flash
discipline
99.9
Claude Opus 5.5
99.9
Gemini 3.8 Flash
table
53.9
Claude Opus 5.5
50.1
Gemini 3.8 Flash

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 Opus 5.5
53.6%
95% [51.6%, 55.7%] · n 54720
Gemini 3.8 Flash
49.5%
95% [48.0%, 51%] · n 77760
Claude Opus 5.5
Detailed comparison
Blackjack
ev loss per decision · lower is better
Claude Opus 5.5
0.0034 bet units
95% [0.0013, 0.0069] · n 447
Gemini 3.8 Flash
0.0016 bet units
95% [0.0009, 0.0025] · n 448
Tied
Detailed comparison
Blackjack Team Play
ev loss per decision · lower is better
Claude Opus 5.5
0.0025 bet units
95% [0.0013, 0.0041] · n 465
Gemini 3.8 Flash
0.0029 bet units
95% [0.0018, 0.0039] · n 480
Tied
Detailed comparison
Roulette
target regret · lower is better · Exhibition
Claude Opus 5.5
0.04 pp
95% [0.03, 0.06] · n 400
Gemini 3.8 Flash
0.23 pp
95% [0.18, 0.27] · n 400
Claude Opus 5.5
Detailed comparison
Craps
ev loss per chip · lower is better
Claude Opus 5.5
0.0047 chips / chip bet
95% [0.0034, 0.0061] · n 6061
Gemini 3.8 Flash
0.0032 chips / chip bet
95% [0.0024, 0.0044] · n 2878
Tied
Detailed comparison
Video Poker
ev loss per hand · lower is better
Claude Opus 5.5
0.032 credits / hand
95% [0.002, 0.078] · n 400
Gemini 3.8 Flash
0.0094 credits / hand
95% [0.000, 0.026] · n 400
Tied
Detailed comparison
Showdown Hold’em
ev loss per decision · lower is better
Claude Opus 5.5
0.0036 bet units
95% [0.0009, 0.0067] · n 321
Gemini 3.8 Flash
0.022 bet units
95% [0.014, 0.030] · n 341
Claude Opus 5.5
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.