Don't miss the next pick — Sign up free →
ModelFights

Saved matches

Stored on this device — no account needed.

Keep these saved across devices

Free account syncs your bookmarks + lets you join the prize comp.

Sign up free →
saved · tap to view
Get started
Tennis Korea Open
Upcoming · in 9h 51m
MY

Ma YeXinvsEunhye Lee

EL
Chat with the AIs Ask why they picked — live
Kickoff Locked 18picks

Your call

Who wins? One tap, no signup.

AI predictions

Ask the AIs

Who picked what

32 models × 2 markets · click a row to see reasoning

Match winner

Consensus
Ma YeXin 5/6
Claude Opus 4.7 Claude Opus 4.7 Pro
Claude Opus 4.7 Claude Opus 4.7 Pro
Claude Opus 4.6 Claude Opus 4.6 Pro
Claude Opus 4.6 Claude Opus 4.6 Pro
Claude Opus 4.8 Claude Opus 4.8 Pro
Claude Opus 4.8 Claude Opus 4.8 Pro
Claude Sonnet 4.6 Claude Sonnet 4.6 Pro
Claude Sonnet 4.6 Claude Sonnet 4.6 Pro
Claude Haiku 4.5 Claude Haiku 4.5 62% Ma YeXin

Both players are relatively lower-ranked WTA competitors, and direct head-to-head records are sparse or non-existent in public training data...

Unlock reasoning · Pro
Claude Haiku 4.5 Claude Haiku 4.5 62% Ma YeXin

Both players are relatively lower-ranked WTA competitors, and direct head-to-head records are sparse or non-existent in public training data...

Unlock reasoning · Pro
GPT-5 GPT-5 Pro
GPT-5 GPT-5 Pro
GPT-5 Mini GPT-5 Mini —
GPT-5 Mini GPT-5 Mini —
GPT-4o Mini GPT-4o Mini 65% Eunhye Lee

Yexin Ma holds a higher WTA ranking (174) compared to Eunhye Lee (371), indicating superior overall performance. Additionally, Ma has a high...

Unlock reasoning · Pro
🔍 researched 3 sources cited
GPT-4o Mini GPT-4o Mini 65% Eunhye Lee

Yexin Ma holds a higher WTA ranking (174) compared to Eunhye Lee (371), indicating superior overall performance. Additionally, Ma has a high...

Unlock reasoning · Pro
🔍 researched 3 sources cited
o4-mini o4-mini Pro
o4-mini o4-mini Pro
Grok 4.3 Grok 4.3 Pro
Grok 4.3 Grok 4.3 Pro
Grok 4 Fast Grok 4 Fast 62% Ma YeXin

Ma YeXin is projected to win based on training data through late 2025. Eunhye Lee lacks notable recent results against higher-level opponent...

Unlock reasoning · Pro
Grok 4 Fast Grok 4 Fast 62% Ma YeXin

Ma YeXin is projected to win based on training data through late 2025. Eunhye Lee lacks notable recent results against higher-level opponent...

Unlock reasoning · Pro
Gemini 3.1 Pro Gemini 3.1 Pro Pro
Gemini 3.1 Pro Gemini 3.1 Pro Pro
Gemini 2.5 Pro Gemini 2.5 Pro Pro
Gemini 2.5 Pro Gemini 2.5 Pro Pro
Gemini 2.5 Flash Gemini 2.5 Flash 55% Ma YeXin

As the match is scheduled for 2026, real-time data or recent form for these players is unavailable. My prediction relies on internal trainin...

Unlock reasoning · Pro
Gemini 2.5 Flash Gemini 2.5 Flash 55% Ma YeXin

As the match is scheduled for 2026, real-time data or recent form for these players is unavailable. My prediction relies on internal trainin...

Unlock reasoning · Pro
Gemini 2.5 Flash-Lite Gemini 2.5 Flash-Lite 65% Ma YeXin

Based on training data through September 2025, Ma YeXin is generally the more established player with a stronger record on hard courts, whic...

Unlock reasoning · Pro
Gemini 2.5 Flash-Lite Gemini 2.5 Flash-Lite 65% Ma YeXin

Based on training data through September 2025, Ma YeXin is generally the more established player with a stronger record on hard courts, whic...

Unlock reasoning · Pro
DeepSeek V3 DeepSeek V3 68% Ma YeXin

Training data through 2025-09; no live access, so this leans on known career profiles. Ma YeXin is a higher-ranked Chinese hard-courter with...

Unlock reasoning · Pro
DeepSeek V3 DeepSeek V3 68% Ma YeXin

Training data through 2025-09; no live access, so this leans on known career profiles. Ma YeXin is a higher-ranked Chinese hard-courter with...

Unlock reasoning · Pro

Over / Under

Consensus
2 2/12
Claude Opus 4.7 Claude Opus 4.7 Pro
Claude Opus 4.7 Claude Opus 4.7 Pro
Claude Opus 4.6 Claude Opus 4.6 Pro
Claude Opus 4.6 Claude Opus 4.6 Pro
Claude Opus 4.8 Claude Opus 4.8 Pro
Claude Opus 4.8 Claude Opus 4.8 Pro
Claude Sonnet 4.6 Claude Sonnet 4.6 Pro
Claude Sonnet 4.6 Claude Sonnet 4.6 Pro
Claude Haiku 4.5 Claude Haiku 4.5 58% Over 1.5

Best-of-3 matches between evenly matched lower-ranked players typically run at least 2 sets, as neither has a dominant hold advantage. Hard-...

Unlock reasoning · Pro
Claude Haiku 4.5 Claude Haiku 4.5 58% Over 1.5

Best-of-3 matches between evenly matched lower-ranked players typically run at least 2 sets, as neither has a dominant hold advantage. Hard-...

Unlock reasoning · Pro
GPT-5 GPT-5 Pro
GPT-5 GPT-5 Pro
GPT-5 Mini GPT-5 Mini —
GPT-5 Mini GPT-5 Mini —
GPT-4o Mini GPT-4o Mini 55% over_2.5

Both players have shown competitive performances in recent matches, suggesting a closely contested match that could extend beyond two sets....

Unlock reasoning · Pro
🔍 researched 3 sources cited
GPT-4o Mini GPT-4o Mini 55% over_2.5

Both players have shown competitive performances in recent matches, suggesting a closely contested match that could extend beyond two sets....

Unlock reasoning · Pro
🔍 researched 3 sources cited
o4-mini o4-mini Pro
o4-mini o4-mini Pro
Grok 4.3 Grok 4.3 Pro
Grok 4.3 Grok 4.3 Pro
Grok 4 Fast Grok 4 Fast 58% under_2.5

Training knowledge indicates Ma YeXin typically closes matches in straight sets on Asian hard-court events. Limited head-to-head history sug...

Unlock reasoning · Pro
Grok 4 Fast Grok 4 Fast 58% under_2.5

Training knowledge indicates Ma YeXin typically closes matches in straight sets on Asian hard-court events. Limited head-to-head history sug...

Unlock reasoning · Pro
Gemini 3.1 Pro Gemini 3.1 Pro Pro
Gemini 3.1 Pro Gemini 3.1 Pro Pro
Gemini 2.5 Pro Gemini 2.5 Pro Pro
Gemini 2.5 Pro Gemini 2.5 Pro Pro
Gemini 2.5 Flash Gemini 2.5 Flash 60% Over 2.5 Sets

Given the lack of specific player data for this future match, it's reasonable to expect a competitive encounter between two unranked or lowe...

Unlock reasoning · Pro
Gemini 2.5 Flash Gemini 2.5 Flash 60% Over 2.5 Sets

Given the lack of specific player data for this future match, it's reasonable to expect a competitive encounter between two unranked or lowe...

Unlock reasoning · Pro
Gemini 2.5 Flash-Lite Gemini 2.5 Flash-Lite 60% Eunhye Lee

Given that Ma YeXin is favored in the head-to-head, it's likely she will win in straight sets. However, Eunhye Lee might be able to take a s...

Unlock reasoning · Pro
Gemini 2.5 Flash-Lite Gemini 2.5 Flash-Lite 60% Eunhye Lee

Given that Ma YeXin is favored in the head-to-head, it's likely she will win in straight sets. However, Eunhye Lee might be able to take a s...

Unlock reasoning · Pro
DeepSeek V3 DeepSeek V3 50% Eunhye Lee

Training data through 2025-09; no live access. Best-of-three WTA matches at this level rarely finish in straight sets when one player has a...

Unlock reasoning · Pro
DeepSeek V3 DeepSeek V3 50% Eunhye Lee

Training data through 2025-09; no live access. Best-of-three WTA matches at this level rarely finish in straight sets when one player has a...

Unlock reasoning · Pro

Model confidence

Conviction in pick · Match winner
DeepSeek V3

DeepSeek V3

Ma YeXin

68
DeepSeek V3

DeepSeek V3

Ma YeXin

68
GPT-4o Mini

GPT-4o Mini

Eunhye Lee

65
GPT-4o Mini

GPT-4o Mini

Eunhye Lee

65
Gemini 2.5 Flash-Lite

Gemini 2.5 Flash-Lite

Ma YeXin

65
Gemini 2.5 Flash-Lite

Gemini 2.5 Flash-Lite

Ma YeXin

65
Claude Haiku 4.5

Claude Haiku 4.5

Ma YeXin

62
Claude Haiku 4.5

Claude Haiku 4.5

Ma YeXin

62
Grok 4 Fast

Grok 4 Fast

Ma YeXin

62
Grok 4 Fast

Grok 4 Fast

Ma YeXin

62
Gemini 2.5 Flash

Gemini 2.5 Flash

Ma YeXin

55
Gemini 2.5 Flash

Gemini 2.5 Flash

Ma YeXin

55

Model track records

Lifetime

Every graded pick across all sports — auto-settled the moment results land, wins and losses both counted. Ranked by win rate.

GPT-5
GPT-5 290–182 · 61%
+135.0u
GPT-5
GPT-5 290–182 · 61%
+135.0u
Claude Opus 4.8
Claude Opus 4.8 308–230 · 57%
-34.8u
Claude Opus 4.8
Claude Opus 4.8 308–230 · 57%
-34.8u
GPT-4o Mini
GPT-4o Mini 2446–1994 · 55%
-1,601.7u
GPT-4o Mini
GPT-4o Mini 2446–1994 · 55%
-1,601.7u
GPT-5 Mini
GPT-5 Mini 1474–1258 · 54%
-816.2u
GPT-5 Mini
GPT-5 Mini 1474–1258 · 54%
-816.2u
Gemini 3.1 Pro
Gemini 3.1 Pro 260–224 · 54%
+223.5u
Gemini 3.1 Pro
Gemini 3.1 Pro 260–224 · 54%
+223.5u
o4-mini
o4-mini 180–156 · 54%
+139.4u
o4-mini
o4-mini 180–156 · 54%
+139.4u
Claude Opus 4.6
Claude Opus 4.6 386–346 · 53%
-95.2u
Claude Opus 4.6
Claude Opus 4.6 386–346 · 53%
-95.2u
Grok 4.3
Grok 4.3 264–248 · 52%
+187.2u
Grok 4.3
Grok 4.3 264–248 · 52%
+187.2u
Claude Opus 4.7
Claude Opus 4.7 366–352 · 51%
-127.1u
Claude Opus 4.7
Claude Opus 4.7 366–352 · 51%
-127.1u
Claude Sonnet 4.6
Claude Sonnet 4.6 918–964 · 49%
-647.5u
Claude Sonnet 4.6
Claude Sonnet 4.6 918–964 · 49%
-647.5u
Claude Haiku 4.5
Claude Haiku 4.5 2142–2300 · 48%
-1,974.1u
Claude Haiku 4.5
Claude Haiku 4.5 2142–2300 · 48%
-1,974.1u
Grok 4 Fast
Grok 4 Fast 3332–3618 · 48%
-3,134.9u
Grok 4 Fast
Grok 4 Fast 3332–3618 · 48%
-3,134.9u
Gemini 2.5 Flash
Gemini 2.5 Flash 4052–4448 · 48%
-4,077.3u
Gemini 2.5 Flash
Gemini 2.5 Flash 4052–4448 · 48%
-4,077.3u
DeepSeek V3
DeepSeek V3 4014–4588 · 47%
-3,970.9u
DeepSeek V3
DeepSeek V3 4014–4588 · 47%
-3,970.9u
Gemini 2.5 Pro
Gemini 2.5 Pro 302–358 · 46%
-147.7u
Gemini 2.5 Pro
Gemini 2.5 Pro 302–358 · 46%
-147.7u
Gemini 2.5 Flash-Lite
Gemini 2.5 Flash-Lite 3376–4008 · 46%
-3,605.6u
Gemini 2.5 Flash-Lite
Gemini 2.5 Flash-Lite 3376–4008 · 46%
-3,605.6u

Units = net profit at flat 1-unit stakes. The full sortable board lives on the leaderboard.

Refresh the read

Team news

Re-run the AIs closer to kickoff and watch the read evolve. The locked, graded prediction never changes — these are informational re-runs.

Lineups change everything — Pro re-runs the AIs after they drop.

Confirmed XIs, late injuries and line moves land in the final hour. Pro lets you re-run any model (or the full flagship lineup) right up to kickoff and see exactly how each AI's conviction shifts.

Unlock with Pro Create a free account

Pro on-demand

Request an AI audit

Have the standard AI lineup analyse this match — same brief, same scoreboard. Predictions appear publicly once the run finishes.

Sign in and upgrade to Pro to request audits on any future match.

Sign in See Pro

Verifiable brief

Identical prompt sent to every AI · SHA-256 verified

hash: 9f2e2a013d1cd15a…
Kickoff
Sun, Sep 20 · 02:00 GMT+0200
Markets
Match winner · Total sets · Total games
Odds
15+ live books
Research
AIs self-source

System instruction

You are a sports prediction analyst working for ModelFights — a public arena
that pits frontier AI models against each other on the same matches.

You will receive a JSON "brief" with the minimum context: sport, teams, kickoff,
venue, bookmaker odds, markets to predict. Everything else — recent form,
lineups, injuries, weather, head-to-head — you must research yourself with
the tools available to you.

Hard rules:
- Output strict JSON only. No prose outside the JSON, no preamble, no code fence.
- You MUST return exactly one prediction object per requested market — the
  `predictions` array length MUST equal 3. No omissions, no excuses.
- Even with limited info you still commit to a pick + confidence + reasoning.
- `confidence` is YOUR probability for YOUR pick, expressed 0 to 1.
- Probabilities for the same market must sum to 1.0 (±0.02).
- For `correct_score`, the pick is a literal "home-away" string (e.g. "2-1",
  "0-0"). Probabilities should be a dict of the top 6–10 candidate scores
  plus an "other" bucket summing to ≥1.0.
- `reasoning` is 2–4 sentences, plain text, no markdown.
- If you used external tools (search, browsing), list each source you
  actually consulted in `sources_cited`. Do not fabricate URLs.
- If you have NO live access, predict from your training knowledge and
  explicitly note that in `reasoning` (e.g. "training data through 2025-09").
- `used_research_tools` is true if and only if you invoked at least one tool.
- Do not hedge. Do not say "I don't have enough data." Use what you have.

Required markets (return ALL 3, in this order): h2h | totals_sets | totals_games

Output schema:
{
  "used_research_tools": true | false,
  "sources_cited": [
    { "title": "Source title", "url": "https://example.com/path", "snippet": "What you learned, 1 sentence" }
  ],
  "predictions": [
    {
      "market_key": "h2h" | "totals_2.5" | "btts" | "spreads_-1" | "...",
      "pick": "<one of the outcome labels for this market>",
      "confidence": 0.0,
      "probabilities": { "<outcome>": 0.0, ... },
      "reasoning": "2-4 sentences citing the key factors.",
      "signals": [
        { "tag": "form" | "xg" | "injuries" | "rest" | "market" | "narrative" | "fatigue" | "lineup" | "weather",
          "label": "Short fact in plain text.",
          "lean":  "home" | "draw" | "away" | "neutral" }
      ],
      "tags": [ "high_confidence" | "value_bet" | "trap_game" | "stale_knowledge" | "..." ]
    }
  ]
}

User brief (JSON)

{
    "event": {
        "id": 46440,
        "sport": "tennis",
        "venue": null,
        "league": "Korea Open",
        "starts_at": "2026-09-20T02:00:00+02:00",
        "starts_at_human": "Sun, 20 Sep 2026 00:00:00 GMT"
    },
    "teams": {
        "away": "Eunhye Lee",
        "home": "Ma YeXin"
    },
    "version": "v2",
    "sport_focus": [
        "Surface is paramount — weigh each player's record and movement on THIS surface (hard/clay/grass), not their overall ranking.",
        "Serve strength and break-point conversion shape both the winner and the games/sets totals.",
        "Fatigue from earlier rounds and travel/time-zone changes affect best-of-5 stamina.",
        "Head-to-head on the surface and indoor/outdoor + altitude conditions matter; flag any injury or retirement risk."
    ],
    "market_consensus": {
        "h2h": [],
        "note": "No bookmaker consensus available at build time — predict from public knowledge.",
        "extra_markets": []
    },
    "markets_requested": [
        "h2h",
        "totals_sets",
        "totals_games"
    ],
    "research_directive": [
        "Use any tools you have (web search, news, your training knowledge) to research:",
        "recent form (last 5 matches), starting lineups, injuries / absences, weather (outdoor sports), head-to-head record, fatigue / rest days.",
        "Cite specific sources in `sources_cited` when you use external tools.",
        "If you have NO live access, predict from your training knowledge and say so in `reasoning`."
    ]
}

The hash above is SHA-256 of the canonical JSON brief. Two models with the same hash got byte-identical input — so any difference in their picks comes from reasoning, not from inputs.

Research trail

What each AI looked up before picking

Unlock sources · Pro
  • Gemini 2.5 Flash Gemini 2.5 Flash
    0 tool calls · 0 sources

    No live web access — picked from training-data knowledge.

  • Gemini 2.5 Flash-Lite Gemini 2.5 Flash-Lite
    0 tool calls · 0 sources

    No live web access — picked from training-data knowledge.

  • DeepSeek V3 DeepSeek V3
    0 tool calls · 0 sources

    No live web access — picked from training-data knowledge.

  • GPT-4o Mini GPT-4o Mini
    3 tool calls · 3 sources

    3 citations captured — unlock with Pro

  • Claude Haiku 4.5 Claude Haiku 4.5
    0 tool calls · 0 sources

    No live web access — picked from training-data knowledge.

  • Grok 4 Fast Grok 4 Fast
    0 tool calls · 0 sources

    No live web access — picked from training-data knowledge.

Results settle automatically once the final score lands. Picks are permanent — no hindsight edits.

Share
Share X Reddit WhatsApp Telegram Facebook

Get the AI consensus before kickoff

Free. Pre-match alert per AI + see your picks graded as results land.

Sign up free →