Noometry

Model comparison

Grok 4.20 (Non-Reasoning) vs Mercury

Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.6 to 37.6 on the Noometry Index.

Last verified . 9 shared benchmarks.

Grok 4.20 (Non-Reasoning) xAI

48.6

Rank #54 Confirmed

Mercury Inception

37.6

Rank #199 Confirmed

Summary

  • They share 9 benchmarks with published results for both. Grok 4.20 (Non-Reasoning) scores higher in 6 categories and Mercury in 0 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.20 (Non-Reasoning) leads 52.3 to 17.5.
  • The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Grok 4.20 (Non-Reasoning) and 21.6% for Mercury.

Side by side

Grok 4.20 (Non-Reasoning)Mercury
ProviderxAIInception
Noometry Index48.637.6
Released2026-02-17—
WeightsProprietaryProprietary
Context window1M—
Max output30K—
Input $ / M tokens$1.25—
Output $ / M tokens$2.50—
Results tracked469

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Category by category

Coding Grok 4.20 (Non-Reasoning) leads

Grok 4.20 (Non-Reasoning): 42.1 (#112), Mercury: 38.7 (#170)

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
LMArena Coding14591322
LMArena WebDev1375—
WeirdML52.3%—
ALE-Bench1,150—

Agentic & Tool Use Not comparable

Grok 4.20 (Non-Reasoning): 34.4 (#46), Mercury: —

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
Terminal-Bench57.3%—
τ²-bench Banking18%—
LMArena Search1189—
Vending-Bench 24,663—

Reasoning Grok 4.20 (Non-Reasoning) leads

Grok 4.20 (Non-Reasoning): 52.3 (#32), Mercury: 17.5 (#293)

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
Kagi LLM Benchmark75%21.6%
LMArena Hard Prompts14511285
ARC-AGI-265.1%—
NYT Connections (extended)85.4%—
ARC-AGI-189.5%—
Chess Puzzles24%—
Thematic Generalization63.8%—
DTBench90.1%—
LMCA38.7%—
Epoch Capabilities Index151.98—
ForecastBench61.4—

Math Not comparable

Grok 4.20 (Non-Reasoning): 48.2 (#65), Mercury: —

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
FrontierMath (Tiers 1-3)44.9%—
FrontierMath Tier 417.1%—
OTIS Mock AIME 2024-202592.2%—
ProofBench14%—
LMArena Math1455—

Knowledge Not comparable

Grok 4.20 (Non-Reasoning): 52.8 (#60), Mercury: —

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
GPQA Diamond89.3%—
SimpleQA Verified30.2%—
LMArena Expert1439—

Multimodal Not comparable

Grok 4.20 (Non-Reasoning): 33.3 (#98), Mercury: —

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
LMArena Vision1263—
Blueprint-Bench 20%—
LMArena Document1416—

Multilingual Grok 4.20 (Non-Reasoning) leads

Grok 4.20 (Non-Reasoning): 54.5 (#40), Mercury: 41.6 (#206)

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
LMArena Non-English14411260
LMArena Chinese1481—
LMArena French1476—
LMArena German1465—
LMArena Japanese1449—
LMArena Korean1417—
LMArena Russian1458—
LMArena Spanish1443—

Instruction Following Grok 4.20 (Non-Reasoning) leads

Grok 4.20 (Non-Reasoning): 74.8 (#83), Mercury: 65.2 (#224)

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
LMArena Instruction Following14201239

Long Context Grok 4.20 (Non-Reasoning) leads

Grok 4.20 (Non-Reasoning): 45.5 (#34), Mercury: 38.4 (#198)

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
LMArena Longer Query14371266
CL-bench22.2%—
CL-bench Life11.9%—

Writing & Preference Grok 4.20 (Non-Reasoning) leads

Grok 4.20 (Non-Reasoning): 65.7 (#44), Mercury: 46.2 (#221)

BenchmarkGrok 4.20 (Non-Reasoning)Mercury
LMArena Text14511282
LMArena Creative Writing14381191
LMArena Multi-Turn14561282
EQ-Bench Creative Writing1574—

Frequently asked questions

Is Grok 4.20 (Non-Reasoning) better than Mercury?

Grok 4.20 (Non-Reasoning) is the stronger model overall, scoring 48.6 to 37.6 on the Noometry Index.

Is Grok 4.20 (Non-Reasoning) or Mercury better for coding?

Grok 4.20 (Non-Reasoning) scores higher on coding benchmarks: 42.1 versus 38.7 in the Noometry coding category.

How many benchmarks do Grok 4.20 (Non-Reasoning) and Mercury share?

9 benchmarks have published results for both models. Grok 4.20 (Non-Reasoning) has 46 scored results on Noometry and Mercury has 9.

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