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The Chat Judge verdicts

Which AI is best at what?

Public benchmark results for 19 tests across 9 fields, charted side by side. Every score links to the leaderboard it came from.

Showing Anthropic's best-ranked model on each benchmark. Try prompts for Claude →

1 benchmarkUpdated 19 Oct 2026Overall workOne number for agentic work across finance, coding, law and tax.

Vals Index Claude Sonnet 5.5 #1 · 70.85%

See charts 3 benchmarksUpdated 19 Oct 2026LegalDrafting, extraction, legal reasoning and US legal research.

Legal Benchmarks leaderboard Claude Fable 5.1 #1 · 90.4%
LegalBench Claude Fable 5 #1 · 88.56%
Legal Research Bench Claude Opus 5 #2 · 55.29%

See charts 3 benchmarksUpdated 21 Oct 2026Health & medicalPhysician-graded health conversations, medical coding and exam questions.

HealthBench (independent run) Claude Sonnet 5.5 (max with fallback) #1 · 62.1%
MedCode Claude Opus 5 #1 · 63.57%
MedQA Claude Opus 4.5 (Thinking) #10 · 95.88%

See charts 2 benchmarksUpdated 19 Oct 2026FinanceAnalyst research on SEC filings and long credit agreements.

Finance Agent Claude Opus 5.5 #1 · 67.85%
CorpFin v2 Claude Opus 5 #1 · 73.19%

See charts 2 benchmarksUpdated 1 Sep 2026CodingFixing real GitHub issues and solving fresh programming problems.

SWE-bench Verified Claude Opus 5 #1 · 97.0%
LiveCodeBench Claude Fable 5.1 #1 · 90.52%

See charts 2 benchmarksUpdated 19 Oct 2026Agents & tool useMulti-step tasks an agent completes alone in a terminal.

Terminal-Bench 4.0 Claude Opus 5.5 #1 · 65.15%
Terminal-Bench 2.1 Claude Opus 5.5 #1 · 87.64%

See charts 4 benchmarksUpdated 21 Oct 2026Reasoning & knowledgeExpert exams, graduate science, contest maths and broad knowledge.

Humanity's Last Exam Fable 5.1 (xhigh) #2 · 46.50%
GPQA Diamond Claude Opus 5 #8 · 93.43%
AIME Claude Opus 4.7 #7 · 96.25%
MMLU Pro Claude Fable 5.1 #1 · 92.38%

See charts 1 benchmarkUpdated 20 Oct 2026Chat preferenceWhich answers real people prefer in blind side-by-side votes.

LMArena Text Arena Claude Opus 5.5 (High) #3 · 1509

See charts 1 benchmarkUpdated 9 Jan 2026MultilingualReasoning in languages other than English.

MGSM Claude Opus 4.5 (Thinking) #1 · 95.20%

ChatJudge does not run these tests. Scores are copied as published by each source, with a link and the date we read them, and only change when we refresh from the source. Different leaderboards use different settings, so compare models within one chart, not across charts. Spotted a mistake? Tell us.