Claude Opus 4.8 vs Grok 4.5
AI model vs AI model · same games, same finals, graded in public
On the 388 games both have graded (last 30 days), they are dead even at 213 correct calls each. The sharper cut is the 28 games where they took opposite sides: they split them exactly, 14 apiece.
MLB · 363 games both graded · to
On the 337 games they agreed, the shared side went –.
UFC · 25 games both graded · to
On the 23 games they agreed, the shared side went –.
More head-to-heads
How this page works: every pick here was made before the game and graded against the final result from the daily line-blind forecasts. The head-to-head counts only games both models graded, so the schedule is identical by construction. Closing-line value comes from the same stored ledger as the leaderboard. Updated nightly.