Noometry

Model comparison

Grok 4.20 Multi-Agent vs Hy4 preview

Grok 4.20 Multi-Agent and Hy4 preview score almost the same on the Noometry Index (46.2 vs 45.3), so choose on price, context window or the category you care about most.

Last verified . 1 shared benchmarks.

Grok 4.20 Multi-Agent xAI

46.2

Rank #65 Confirmed

Hy4 preview Tencent

45.3

Rank #73 Reported

Summary

  • They share 1 benchmark with published results for both. Grok 4.20 Multi-Agent scores higher in 1 category and Hy4 preview in 2 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Hy4 preview leads 55.7 to 39.4.
  • The biggest single-benchmark swing is NYT Connections (extended): 89.6% for Grok 4.20 Multi-Agent and 68.2% for Hy4 preview.
  • Hy4 preview is cheaper at $0.75 / $2.25 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
  • Hy4 preview accepts more context: 1.05M tokens versus 1M.
  • Hy4 preview has downloadable open weights; the other is API-only.

Side by side

Grok 4.20 Multi-AgentHy4 preview
ProviderxAITencent
Noometry Index46.245.3
Released2026-03-092026-08-28
WeightsProprietaryOpen
Context window1M1.05M
Max output30K64K
Input $ / M tokens$1.25$0.75
Output $ / M tokens$2.50$2.25
Results tracked203

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Category by category

Coding Hy4 preview leads

Grok 4.20 Multi-Agent: 43.0 (#92), Hy4 preview: 51.6 (#38)

BenchmarkGrok 4.20 Multi-AgentHy4 preview
LMArena WebDev—1632
LMArena Coding1457—

Agentic & Tool Use Not comparable

Grok 4.20 Multi-Agent: —, Hy4 preview: —

BenchmarkGrok 4.20 Multi-AgentHy4 preview
LMArena Search1204—

Reasoning Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 43.9 (#48), Hy4 preview: 31.9 (#79)

BenchmarkGrok 4.20 Multi-AgentHy4 preview
NYT Connections (extended)89.6%68.2%
LMArena Hard Prompts1448—

Math Hy4 preview leads

Grok 4.20 Multi-Agent: 39.4 (#104), Hy4 preview: 55.7 (#42)

BenchmarkGrok 4.20 Multi-AgentHy4 preview
ProofBench—75%
LMArena Math1442—

Knowledge Not comparable

Grok 4.20 Multi-Agent: 40.4 (#119), Hy4 preview: —

BenchmarkGrok 4.20 Multi-AgentHy4 preview
LMArena Expert1445—

Multimodal Not comparable

Grok 4.20 Multi-Agent: 40.5 (#48), Hy4 preview: —

BenchmarkGrok 4.20 Multi-AgentHy4 preview
LMArena Vision1259—

Multilingual Not comparable

Grok 4.20 Multi-Agent: 54.4 (#43), Hy4 preview: —

BenchmarkGrok 4.20 Multi-AgentHy4 preview
LMArena Non-English1440—
LMArena Chinese1475—
LMArena French1466—
LMArena German1456—
LMArena Japanese1405—
LMArena Korean1416—
LMArena Russian1457—
LMArena Spanish1447—

Instruction Following Not comparable

Grok 4.20 Multi-Agent: 74.8 (#84), Hy4 preview: —

BenchmarkGrok 4.20 Multi-AgentHy4 preview
LMArena Instruction Following1420—

Long Context Not comparable

Grok 4.20 Multi-Agent: 43.7 (#88), Hy4 preview: —

BenchmarkGrok 4.20 Multi-AgentHy4 preview
LMArena Longer Query1431—

Writing & Preference Not comparable

Grok 4.20 Multi-Agent: 64.0 (#59), Hy4 preview: —

BenchmarkGrok 4.20 Multi-AgentHy4 preview
LMArena Text1450—
LMArena Creative Writing1436—
LMArena Multi-Turn1452—

Frequently asked questions

Is Grok 4.20 Multi-Agent better than Hy4 preview?

Grok 4.20 Multi-Agent and Hy4 preview score almost the same on the Noometry Index (46.2 vs 45.3), so choose on price, context window or the category you care about most.

Which is cheaper, Grok 4.20 Multi-Agent or Hy4 preview?

Hy4 preview is cheaper. It lists at $0.75 per million input tokens and $2.25 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

Is Grok 4.20 Multi-Agent or Hy4 preview better for coding?

Hy4 preview scores higher on coding benchmarks: 51.6 versus 43.0 in the Noometry coding category.

Which has the bigger context window?

Hy4 preview does, with 1.05M tokens against 1M.

How many benchmarks do Grok 4.20 Multi-Agent and Hy4 preview share?

1 benchmark has published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Hy4 preview has 3.

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