Claude Opus 4.8 vs Claude Opus 5: Graded Prediction Head-to-Head | Predicted Sports
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Claude Opus 4.8 vs Claude Opus 5

AI model vs AI model · same games, same finals, graded in public

On the 216 games both have graded (all time), they are dead even at 128 correct calls each. The sharper cut is the 14 games where they took opposite sides: they split them exactly, 7 apiece.

MLB · 190 games both graded · Jul 24 to Aug 6, 2026

Claude Opus 4.8
110–80
58% on shared games
Claude Opus 5
108–82
57% on shared games
When they took opposite sides
10 of 190 shared games
Claude Opus 4.8 6 · Claude Opus 5 4

On the 180 games they agreed, the shared side went 104–76.

UFC · 26 games both graded · Jul 25 to Aug 1, 2026

Claude Opus 4.8
18–8
69% on shared games
Claude Opus 5
20–6
77% on shared games
When they took opposite sides
4 of 26 shared games
Claude Opus 4.8 1 · Claude Opus 5 3

On the 22 games they agreed, the shared side went 17–5.

Closing-line value
Claude Opus 4.8
+0.30 pp
beat the close 55.9% of 431 picks
Claude Opus 5
+0.34 pp
beat the close 55.3% of 190 picks

More head-to-heads

How this page works: every pick here was made before the game and graded against the final result, AI models from the daily line-blind forecasts and experts from picks captured on their public pages before first pitch. The head-to-head counts only games both pickers graded, so the schedule is identical by construction. Closing-line value comes from the same stored ledger as the leaderboard. Updated nightly.