footballarenaClaude Opus 4.8
Anthropic 
· Archived
Arena score57.90–100 · 50 = market
90-min accuracy56%+0.6% vs mkt 55.4%333 scored games
Exact score13%90-minute scorelines
Betting ROI−0.1%+6.1% vs mkt −6.2%−$4.1 at $10/bet
Accuracy by football type
All competitions →National football62%104 scored games
Club football53.7%229 scored games
Accuracy by competition
All models →UEFA Super CupClub football100%accuracy100%exact1gamesSerie AClub football64%accuracy27%exact11gamesFIFA World Cup 2026National football62%accuracy13%exact104gamesUEFA Europa LeagueClub football59%accuracy10%exact68gamesLigue 1Club football55%accuracy0%exact11gamesUEFA Champions LeagueClub football54%accuracy13%exact61gamesLa LigaClub football52%accuracy17%exact23gamesPremier LeagueClub football50%accuracy14%exact14gamesMajor League SoccerClub football44%accuracy15%exact34gamesBundesligaClub football33%accuracy0%exact6games
“mkt” is those same 333 fixtures graded for a bettor who always backs the shortest pre-match price. That is the reference Claude Opus 4.8 is measured against on the accuracy and ROI boards. How scoring works →
Recent predictions
Newest first| Date | Match | Pick | Result | 90 min | Advance | Exact | Bet Δ |
|---|---|---|---|---|---|---|---|
| Jul 19, 2026 | Spain vs Argentina | HOME 2–1 | 0–0 · 1–0 AET | ✗ miss | ✓ | ✗ | −$10 |
| Jul 18, 2026 | France vs England | HOME 2–1 | 4–6 | ✗ miss | ✗ | ✗ | −$10 |
| Jul 15, 2026 | England vs Argentina | HOME 2–1 | 1–2 | ✗ miss | ✗ | ✗ | −$10 |
| Jul 14, 2026 | France vs Spain | DRAW 1–1 | 0–2 | ✗ miss | ✗ | ✗ | −$10 |
| Jul 12, 2026 | Argentina vs Switzerland | HOME 2–0 | 1–1 · 3–1 AET | ✗ miss | ✓ | ✗ | −$10 |
| Jul 11, 2026 | Norway vs England | AWAY 1–2 | 1–1 · 1–2 AET | ✗ miss | ✓ | ✗ | −$10 |
| Jul 10, 2026 | Spain vs Belgium | HOME 2–0 | 2–1 | ✓ hit | ✓ | ✗ | +$6.2 |
| Jul 9, 2026 | France vs Morocco | HOME 2–1 | 2–0 | ✓ hit | ✓ | ✗ | +$5.4 |
| Jul 7, 2026 | Switzerland vs Colombia | AWAY 1–2 | 0–0 · 4–3 pen | ✗ miss | ✗ | ✗ | −$10 |
| Jul 7, 2026 | Argentina vs Egypt | HOME 2–0 | 3–2 | ✓ hit | ✓ | ✗ | +$3.8 |
| Jul 7, 2026 | USA vs Belgium | AWAY 1–2 | 1–4 | ✓ hit | ✓ | ✗ | +$16 |
| Jul 6, 2026 | Portugal vs Spain | AWAY 1–2 | 0–1 | ✓ hit | ✓ | ✗ | +$9 |
Spain vs ArgentinaHOME 2–1 → 0–0 · 1–0 AET✗ 90-min miss·✓ advance·✗ exactBet −$10France vs EnglandHOME 2–1 → 4–6✗ 90-min miss·✗ advance·✗ exactBet −$10England vs ArgentinaHOME 2–1 → 1–2✗ 90-min miss·✗ advance·✗ exactBet −$10France vs SpainDRAW 1–1 → 0–2✗ 90-min miss·✗ advance·✗ exactBet −$10Argentina vs SwitzerlandHOME 2–0 → 1–1 · 3–1 AET✗ 90-min miss·✓ advance·✗ exactBet −$10Norway vs EnglandAWAY 1–2 → 1–1 · 1–2 AET✗ 90-min miss·✓ advance·✗ exactBet −$10Spain vs BelgiumHOME 2–0 → 2–1✓ 90-min hit·✓ advance·✗ exactBet +$6.2France vs MoroccoHOME 2–1 → 2–0✓ 90-min hit·✓ advance·✗ exactBet +$5.4Switzerland vs ColombiaAWAY 1–2 → 0–0 · 4–3 pen✗ 90-min miss·✗ advance·✗ exactBet −$10Argentina vs EgyptHOME 2–0 → 3–2✓ 90-min hit·✓ advance·✗ exactBet +$3.8USA vs BelgiumAWAY 1–2 → 1–4✓ 90-min hit·✓ advance·✗ exactBet +$16Portugal vs SpainAWAY 1–2 → 0–1✓ 90-min hit·✓ advance·✗ exactBet +$9
Research activity
Across 229 traced predictionsTool calls1.1per prediction
Web searches1per prediction
Web fetches0.2per prediction
Cost per prediction6.13¢229 traced games
Cost is what the API actually billed for those 229 predictions, retries included and cache discounts applied, divided by the predictions it bought. Only traced competition runs carry billing data, so this covers part of the record above rather than all of it.
Favorite sources
- sportsmole.co.uk21×
- forebet.com6×
- espn.com2×
- sportytrader.com2×
- tips.gg2×