Noometry

Model comparison

Grok 4 Fast vs Qwen3-Next 80B-A3B Instruct

Qwen3-Next 80B-A3B Instruct is the stronger model overall, scoring 43.0 to 39.4 on the Noometry Index.

Last verified . 20 shared benchmarks.

Grok 4 Fast xAI

39.4

Rank #167 Confirmed

Qwen3-Next 80B-A3B Instruct Alibaba (Qwen)

43.0

Rank #102 Confirmed

Summary

  • They share 20 benchmarks with published results for both. Grok 4 Fast scores higher in 4 categories and Qwen3-Next 80B-A3B Instruct in 4 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in long context, where Grok 4 Fast leads 63.2 to 37.0.
  • The biggest single-benchmark swing is Fiction.LiveBench: 94.4% for Grok 4 Fast and 55.6% for Qwen3-Next 80B-A3B Instruct.
  • Qwen3-Next 80B-A3B Instruct has downloadable open weights; the other is API-only.

Side by side

Grok 4 FastQwen3-Next 80B-A3B Instruct
ProviderxAIAlibaba (Qwen)
Noometry Index39.443.0
Released2025-09-192025-09
WeightsProprietaryOpen
Context window—131K
Max output—33K
Input $ / M tokens—$0.50
Output $ / M tokens—$2
Results tracked3025

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Qwen3-Next 80B-A3B Instruct leads

Grok 4 Fast: 32.5 (#271), Qwen3-Next 80B-A3B Instruct: 42.5 (#98)

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
LMArena Coding14291440
LMArena WebDev1159—
WeirdML42.9%—

Agentic & Tool Use Not comparable

Grok 4 Fast: 29.5 (#86), Qwen3-Next 80B-A3B Instruct: —

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
τ²-bench Banking15.7%—
Cybench30%—
LMArena Search1171—

Reasoning Qwen3-Next 80B-A3B Instruct leads

Grok 4 Fast: 22.2 (#201), Qwen3-Next 80B-A3B Instruct: 31.1 (#81)

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
Kagi LLM Benchmark66.1%66.7%
LMArena Hard Prompts14121428
ARC-AGI-25.3%—
ARC-AGI-148.5%—
DTBench82.7%—
Epoch Capabilities Index144.2—
ForecastBench60.5—

Math Too close to call

Grok 4 Fast: 38.9 (#123), Qwen3-Next 80B-A3B Instruct: 38.8 (#126)

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
LMArena Math14191440
Omni-MATH—46.7%

Knowledge Qwen3-Next 80B-A3B Instruct leads

Grok 4 Fast: 32.0 (#214), Qwen3-Next 80B-A3B Instruct: 41.8 (#106)

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
Vectara Hallucination Rate19.7%9.3%
LMArena Expert14111417
MMLU-Pro—78.6%
GPQA (HELM)—63%

Multilingual Too close to call

Grok 4 Fast: 51.3 (#111), Qwen3-Next 80B-A3B Instruct: 52.1 (#93)

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
LMArena Non-English13961407
LMArena Chinese14571460
LMArena French14311413
LMArena German13831417
LMArena Japanese13521395
LMArena Korean13571364
LMArena Russian13891404
LMArena Spanish14151435

Instruction Following Grok 4 Fast leads

Grok 4 Fast: 73.2 (#121), Qwen3-Next 80B-A3B Instruct: 70.8 (#159)

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
LMArena Instruction Following13871389
IFEval—81%

Long Context Grok 4 Fast leads

Grok 4 Fast: 63.2 (#3), Qwen3-Next 80B-A3B Instruct: 37.0 (#223)

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
Fiction.LiveBench94.4%55.6%
LMArena Longer Query14151403

Writing & Preference Grok 4 Fast leads

Grok 4 Fast: 60.0 (#102), Qwen3-Next 80B-A3B Instruct: 58.0 (#121)

BenchmarkGrok 4 FastQwen3-Next 80B-A3B Instruct
LMArena Text14071417
LMArena Creative Writing13871334
LMArena Multi-Turn14141416
WildBench—80.7%

Frequently asked questions

Is Grok 4 Fast better than Qwen3-Next 80B-A3B Instruct?

Qwen3-Next 80B-A3B Instruct is the stronger model overall, scoring 43.0 to 39.4 on the Noometry Index.

Is Grok 4 Fast or Qwen3-Next 80B-A3B Instruct better for coding?

Qwen3-Next 80B-A3B Instruct scores higher on coding benchmarks: 42.5 versus 32.5 in the Noometry coding category.

How many benchmarks do Grok 4 Fast and Qwen3-Next 80B-A3B Instruct share?

20 benchmarks have published results for both models. Grok 4 Fast has 30 scored results on Noometry and Qwen3-Next 80B-A3B Instruct has 25.

Related comparisons

Go deeper