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Grok vs ChatGPT: AI benchmark scores compared (Oct 2026)

On the 18 public leaderboards where both have a reported score, Grok’s best-ranked model scores higher on 3, ChatGPT’s on 13, and 2 are tied. Counting only the 10 leaderboards their sources still update: Grok 0, ChatGPT 8, 2 tied.

In plain words

  • Multi-domain agent tasks: ChatGPT higher on 1 of 1 (Vals Index).
  • Legal: ChatGPT higher on 2 of 4 (Legal Benchmarks: Data Extraction and LegalBench); tied on Legal Benchmarks: Contract Workflows and Legal Research Bench.
  • Health & medical: ChatGPT higher on all 3 (HealthBench (independent run), MedCode and MedQA).
  • Finance: Grok higher on 1 of 2 (CorpFin v2); ChatGPT higher on 1 of 2 (Finance Agent).
  • Coding: Grok higher on 1 of 2 (LiveCodeBench); ChatGPT higher on 1 of 2 (SWE-bench Verified).
  • Agents & tool use: ChatGPT higher on all 2 (Terminal-Bench 4.0 and Terminal-Bench 2.1).
  • Reasoning & knowledge: Grok higher on 1 of 3 (MMLU Pro); ChatGPT higher on 2 of 3 (GPQA Diamond and AIME).
  • Chat preference: ChatGPT higher on 1 of 1 (LMArena Text Arena).
  • Grok’s best-ranked entry is most often Grok 4.6 (9 of 18); ChatGPT’s is most often GPT-6 Astra (5 of 18).

Grok here means xAI’s Grok models; ChatGPT means OpenAI’s GPT and o-series models (the open-weight GPT OSS models are left out). On each leaderboard we compare each side’s best-ranked model, so the model can differ by benchmark. A side only counts where it appears on the leaderboard (we keep each source’s top rows).

Results from published AI leaderboards. Compare models within each benchmark; scores from different tests aren’t directly comparable. How we collect these results

Multi-domain agent tasks

BenchmarkGrokChatGPTHigher score
Vals IndexAccuracy · dated 21 Oct 202658.56%Grok 4.7 · #1165.02%GPT-6 Astra · #5ChatGPT higherby 6.46 pts

Health & medical

BenchmarkGrokChatGPTHigher score
HealthBench (independent run)HealthBench · checked 22 Oct 202656.0%Grok 4.7 (xhigh) · #858.5%GPT-6.1 Sol (max) · #3ChatGPT higherby 2.5 pts
MedCodeAccuracy · dated 13 Oct 202649.55%Grok 4.7 · #2252.73%GPT 5.1 · #13ChatGPT higherby 3.18 pts
MedQAAccuracy · dated 16 Apr 2026 · no longer updated94.55%Grok 4.20 (Reasoning) · #1696.52%o1 · #1ChatGPT higherby 1.97 pts

Finance

BenchmarkGrokChatGPTHigher score
Finance AgentAccuracy · dated 19 Oct 202660.59%Grok 4.7 · #1861.82%GPT-6.1 Sol · #13ChatGPT higherby 1.23 pts
CorpFin v2Accuracy · dated 12 Aug 2026 · no longer updated68.53%Grok 4.3 · #868.42%GPT 5.5 · #9Grok higherby 0.11 pts

Coding

BenchmarkGrokChatGPTHigher score
SWE-bench VerifiedScore · dated 1 Sep 2026 · no longer updated95.6%Grok 4.6 · #496.2%GPT-5.6 Sol · #3ChatGPT higherby 0.6 pts
LiveCodeBenchAccuracy · dated 1 Sep 2026 · no longer updated88.22%Grok 4.6 · #787.99%GPT 5.2 Codex · #9Grok higherby 0.23 pts

Agents & tool use

BenchmarkGrokChatGPTHigher score
Terminal-Bench 4.0Score · dated 19 Oct 202628.79%Grok 4.7 · #2059.60%GPT-6 Astra · #3ChatGPT higherby 30.81 pts
Terminal-Bench 2.1Score · dated 28 Sep 2026 · no longer updated78.28%Grok 4.6 · #1387.27%GPT-6 Astra · #2ChatGPT higherby 8.99 pts

Reasoning & knowledge

BenchmarkGrokChatGPTHigher score
GPQA DiamondAccuracy · dated 1 Sep 2026 · no longer updated94.70%Grok 4.6 · #395.20%GPT-5.6 Sol · #2ChatGPT higherby 0.50 pts
AIMEAccuracy · dated 16 Apr 2026 · no longer updated96.46%Grok 4.20 (Reasoning) · #696.88%GPT 5.2 · #2ChatGPT higherby 0.42 pts
MMLU ProAccuracy · dated 1 Sep 2026 · no longer updated89.40%Grok 4.6 · #1189.10%GPT-5.6 Sol · #16Grok higherby 0.30 pts

Chat preference

BenchmarkGrokChatGPTHigher score
LMArena Text ArenaArena score · dated 20 Oct 20261475 ±5Grok 4.20 Beta 1 · #391484 ±4GPT-5.6 Sol (xHigh) · #21ChatGPT higherby 9, within ±

Every score links to the leaderboard that published it. Sources: Vals AI ↗ · Legal Benchmarks ↗ · Artificial Analysis ↗ · LMArena ↗. ChatJudge does not run these tests.

Test Grok and ChatGPT on your own work

Run the same prompt in both and compare the answers. Prompts for Grok → · Prompts for ChatGPT →

ReviewsClaudeCompare two documents clause by clauseChecking a filled-in contract or proposal against its template.View prompt ProposalsChatGPTClarify commercial termsPricing, commission or partnership fees are being misread.View prompt
ResearchAny modelTurn messy text into a tableYou extract structured data from messy text. I will give you text and the fields I want. Return…View prompt AI Native SolutionsAI Native Solutions @ainativesolReport or remove
MarketingClaudeCustomer interviews to evidence-backed landing-page outlineFirst, extract exact quotes about desired outcomes, buying objections, and evidence customers ask…View prompt Nastation | AI for Client Work @NastaitonReport or remove
ResearchGeminiInvestor/stock due-diligenceAct as a forensic equity analyst. Conduct a deep research analysis for [COMPANY / TICKER] based on…View prompt MasterYoda @MasterYoda1991Report or remove
PricingClaudeUnit economics checkTesting whether your pricing survives your real usage costs.View prompt

Questions people ask

Is Grok better than ChatGPT?

On the 18 public leaderboards where both have a reported score, Grok’s best-ranked model scores higher on 3, ChatGPT’s on 13, and 2 are tied. Counting only the 10 leaderboards their sources still update: Grok 0, ChatGPT 8, 2 tied. Which is better depends on the task: the leaders differ by benchmark, and scores from different tests are not directly comparable.

Is Grok or ChatGPT better for multi-domain agent tasks?

Vals Index: ChatGPT 65.02% vs Grok 58.56%. Each figure is the best-ranked model from each side on that leaderboard, as published by its source.

Is Grok or ChatGPT better for legal work?

Legal Benchmarks: Contract Workflows: tied at 25.8%; Legal Benchmarks: Data Extraction: ChatGPT 56.7% vs Grok 53.3%; LegalBench: ChatGPT 86.97% vs Grok 86.31%; Legal Research Bench: tied at 48.08%. Each figure is the best-ranked model from each side on that leaderboard, as published by its source.

Is Grok or ChatGPT better for health & medical questions?

HealthBench (independent run): ChatGPT 58.5% vs Grok 56.0%; MedCode: ChatGPT 52.73% vs Grok 49.55%; MedQA: ChatGPT 96.52% vs Grok 94.55%. Each figure is the best-ranked model from each side on that leaderboard, as published by its source.

Is Grok or ChatGPT better for finance?

Finance Agent: ChatGPT 61.82% vs Grok 60.59%; CorpFin v2: Grok 68.53% vs ChatGPT 68.42%. Each figure is the best-ranked model from each side on that leaderboard, as published by its source.

Is Grok or ChatGPT better for coding?

SWE-bench Verified: ChatGPT 96.2% vs Grok 95.6%; LiveCodeBench: Grok 88.22% vs ChatGPT 87.99%. Each figure is the best-ranked model from each side on that leaderboard, as published by its source.

How recent is this comparison?

It is rebuilt from our benchmark data, last checked on 22 Oct 2026. Each leaderboard’s own date is shown in the table. MedQA, CorpFin v2, SWE-bench Verified, LiveCodeBench, Terminal-Bench 2.1, GPQA Diamond, AIME and MMLU Pro are no longer updated by the source, so newer models may be missing there.

Which models are being compared?

On each leaderboard we take the best-ranked Grok model and the best-ranked ChatGPT model, so the model can change from one benchmark to the next. Grok’s top entry is most often Grok 4.6 (9 of 18); ChatGPT’s is most often GPT-6 Astra (5 of 18). Grok here means xAI’s Grok models; ChatGPT means OpenAI’s GPT and o-series models (the open-weight GPT OSS models are left out).