Noometry

Model comparison

Grok 4.20 Multi-Agent vs Nemotron 3.5 Lightning

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 39.3 on the Noometry Index. Nemotron 3.5 Lightning costs 18× 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 . 17 shared benchmarks.

Grok 4.20 Multi-Agent xAI

45.5

Rank #62 Confirmed

Nemotron 3.5 Lightning NVIDIA

39.3

Rank #156 Confirmed

Summary

  • They share 17 benchmarks with published results for both. Grok 4.20 Multi-Agent scores higher in 8 categories and Nemotron 3.5 Lightning in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 42.4 to 25.7.
  • Nemotron 3.5 Lightning is cheaper at $0.06 / $0.16 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
  • Grok 4.20 Multi-Agent accepts more context: 1M tokens versus 262K.
  • Nemotron 3.5 Lightning has downloadable open weights; the other is API-only.

Side by side

Grok 4.20 Multi-AgentNemotron 3.5 Lightning
ProviderxAINVIDIA
Noometry Index45.539.3
Released2026-03-092026-08-11
WeightsProprietaryOpen
Context window1M262K
Max output30K262K
Input $ / M tokens$1.25$0.06
Output $ / M tokens$2.50$0.16
Results tracked2018

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Category by category

Coding Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 42.4 (#91), Nemotron 3.5 Lightning: 39.6 (#143)

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Coding14581370

Agentic & Tool Use Not comparable

Grok 4.20 Multi-Agent: —, Nemotron 3.5 Lightning: —

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Search1204—

Reasoning Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 42.4 (#44), Nemotron 3.5 Lightning: 25.7 (#128)

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Hard Prompts14481335
NYT Connections (extended)89.6%—

Math Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 36.6 (#106), Nemotron 3.5 Lightning: 34.7 (#156)

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Math14411355

Knowledge Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 39.7 (#116), Nemotron 3.5 Lightning: 36.9 (#154)

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Expert14451354

Multimodal Not comparable

Grok 4.20 Multi-Agent: 39.8 (#44), Nemotron 3.5 Lightning: —

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Vision1259—

Multilingual Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 54.6 (#40), Nemotron 3.5 Lightning: 44.0 (#175)

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Non-English14401292
LMArena Chinese14751356
LMArena French14671369
LMArena German14561280
LMArena Japanese14051213
LMArena Korean14161233
LMArena Russian14571257
LMArena Spanish14471321

Instruction Following Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 75.0 (#80), Nemotron 3.5 Lightning: 69.8 (#166)

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Instruction Following14201317

Long Context Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 43.7 (#84), Nemotron 3.5 Lightning: 39.9 (#160)

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Longer Query14301312

Writing & Preference Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 64.1 (#57), Nemotron 3.5 Lightning: 48.5 (#198)

BenchmarkGrok 4.20 Multi-AgentNemotron 3.5 Lightning
LMArena Text14501324
LMArena Creative Writing14351254
LMArena Multi-Turn14511327
EQ-Bench Creative Writing—1280

Frequently asked questions

Is Grok 4.20 Multi-Agent better than Nemotron 3.5 Lightning?

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 39.3 on the Noometry Index. Nemotron 3.5 Lightning costs 18× 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 Nemotron 3.5 Lightning?

Nemotron 3.5 Lightning is cheaper. It lists at $0.06 per million input tokens and $0.16 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

Is Grok 4.20 Multi-Agent or Nemotron 3.5 Lightning better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 42.4 versus 39.6 in the Noometry coding category.

Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 262K.

How many benchmarks do Grok 4.20 Multi-Agent and Nemotron 3.5 Lightning share?

17 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Nemotron 3.5 Lightning has 18.

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