Claude Opus 4.8 vs Gemini 3.5 Flash
AI model vs AI model · same games, same finals, graded in public
On the 355 games both have graded (all time), Claude Opus 4.8 leads 214–204 on correct calls. The sharper cut is the 56 games where they took opposite sides: Claude Opus 4.8 was right 33 of 56.
MLB · 317 games both graded · Jun 30 to Jul 26, 2026
On the 264 games they agreed, the shared side went 151–113.
UFC · 38 games both graded · Jul 11 to Jul 25, 2026
On the 35 games they agreed, the shared side went 30–5.
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.