GPT-5.5 vs Grok 4.5: Graded Prediction Head-to-Head | Predicted Sports
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GPT-5.5 vs Grok 4.5

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

All time Last 30 days Last 90 days

On the 40 games both have graded (last 90 days), they are dead even at 28 correct calls each. They have only disagreed 4 times so far, too few to read.

MLB · 15 games both graded · Jul 10 to Jul 11, 2026

GPT-5.5
7–8
47% on shared games
Grok 4.5
7–8
47% on shared games
When they took opposite sides
2 of 15 shared games
GPT-5.5 1 · Grok 4.5 1

On the 13 games they agreed, the shared side went 6–7.

UFC · 25 games both graded · Jul 11 to Jul 18, 2026

GPT-5.5
21–4
84% on shared games
Grok 4.5
21–4
84% on shared games
When they took opposite sides
2 of 25 shared games
GPT-5.5 1 · Grok 4.5 1

On the 23 games they agreed, the shared side went 20–3.

Closing-line value
GPT-5.5
+0.05 pp
beat the close 44.3% of 115 picks
Grok 4.5
+0.26 pp
beat the close 57.3% of 185 picks

More head-to-heads

GPT-5.5 vs GLM 5.2 GPT-5.5 vs Claude Opus 4.8 GPT-5.5 vs Gemini 3.5 Flash GPT-5.5 vs DeepSeek V4 Pro GPT-5.5 vs Claude Sonnet 5 GPT-5.5 vs GPT-5.6 Sol Pro GPT-5.5 vs GPT-5.6 Luna Pro GPT-5.5 vs Gemini 3.5 Flash Lite
Grok 4.5 vs GLM 5.2 Grok 4.5 vs Claude Opus 4.8 Grok 4.5 vs Gemini 3.5 Flash Grok 4.5 vs DeepSeek V4 Pro Grok 4.5 vs Claude Sonnet 5 Grok 4.5 vs GPT-5.6 Sol Pro Grok 4.5 vs GPT-5.6 Luna Pro Grok 4.5 vs Gemini 3.5 Flash Lite

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.