Noometry

Model comparison

Grok 4.20 Multi-Agent vs Qwen3.5 Plus

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 42.3 on the Noometry Index. Qwen3.5 Plus costs 1.7× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.

Last verified . 0 shared benchmarks.

Grok 4.20 Multi-Agent xAI

45.5

Rank #62 Confirmed

Qwen3.5 Plus Alibaba (Qwen)

42.3

Rank #103 Confirmed

Summary

  • The widest gap is in math, where Qwen3.5 Plus leads 47.9 to 36.6.
  • Qwen3.5 Plus is cheaper at $0.40 / $2.40 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.

Side by side

Grok 4.20 Multi-AgentQwen3.5 Plus
ProviderxAIAlibaba (Qwen)
Noometry Index45.542.3
Released2026-03-092026-02-16
WeightsProprietaryProprietary
Context window1M1M
Max output30K66K
Input $ / M tokens$1.25$0.40
Output $ / M tokens$2.50$2.40
Results tracked2015

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Category by category

Coding Not comparable

Grok 4.20 Multi-Agent: 42.4 (#91), Qwen3.5 Plus: —

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
LMArena Coding1458—
ALE-Bench—621.92

Agentic & Tool Use Not comparable

Grok 4.20 Multi-Agent: —, Qwen3.5 Plus: —

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
LMArena Search1204—
Vending-Bench 2—0.54

Reasoning Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 42.4 (#44), Qwen3.5 Plus: 32.0 (#67)

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
NYT Connections (extended)89.6%—
Chess Puzzles—22%
LMArena Hard Prompts1448—
Mystery Game Puzzles—17%
DTBench—80.5%
LMCA—36.4%
Epoch Capabilities Index—146.79

Math Qwen3.5 Plus leads

Grok 4.20 Multi-Agent: 36.6 (#106), Qwen3.5 Plus: 47.9 (#55)

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
OTIS Mock AIME 2024-2025—86.7%
LMArena Math1441—
FrontierMath (Feb 2025 set)—21%
FrontierMath Tier 4 (v1)—2.1%

Knowledge Qwen3.5 Plus leads

Grok 4.20 Multi-Agent: 39.7 (#116), Qwen3.5 Plus: 46.0 (#78)

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
GPQA Diamond—84.8%
SimpleQA Verified—25.4%
Vectara Hallucination Rate—10.7%
LMArena Expert1445—

Multimodal Not comparable

Grok 4.20 Multi-Agent: 39.8 (#44), Qwen3.5 Plus: —

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
LMArena Vision1259—

Multilingual Not comparable

Grok 4.20 Multi-Agent: 54.6 (#40), Qwen3.5 Plus: —

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
LMArena Non-English1440—
LMArena Chinese1475—
LMArena French1467—
LMArena German1456—
LMArena Japanese1405—
LMArena Korean1416—
LMArena Russian1457—
LMArena Spanish1447—

Instruction Following Not comparable

Grok 4.20 Multi-Agent: 75.0 (#80), Qwen3.5 Plus: —

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
LMArena Instruction Following1420—

Long Context Too close to call

Grok 4.20 Multi-Agent: 43.7 (#84), Qwen3.5 Plus: 42.9 (#109)

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
CL-bench—19.8%
CL-bench Life—12.4%
LMArena Longer Query1430—

Writing & Preference Not comparable

Grok 4.20 Multi-Agent: 64.1 (#57), Qwen3.5 Plus: —

BenchmarkGrok 4.20 Multi-AgentQwen3.5 Plus
LMArena Text1450—
LMArena Creative Writing1435—
LMArena Multi-Turn1451—

Frequently asked questions

Is Grok 4.20 Multi-Agent better than Qwen3.5 Plus?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 42.3 on the Noometry Index. Qwen3.5 Plus costs 1.7× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.

Which is cheaper, Grok 4.20 Multi-Agent or Qwen3.5 Plus?

Qwen3.5 Plus is cheaper. It lists at $0.40 per million input tokens and $2.40 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

Which has the bigger context window?

Both accept 1M tokens.

How many benchmarks do Grok 4.20 Multi-Agent and Qwen3.5 Plus share?

0 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Qwen3.5 Plus has 15.

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