Model comparison

Grok 4.20 Multi-Agent vs Step 3.7 Flash

Grok 4.20 Multi-Agent is the stronger model overall, scoring 46.2 to 37.3 on the Noometry Index. Step 3.7 Flash costs 3.8× 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 October 10, 2026. 1 shared benchmarks.

Grok 4.20 Multi-Agent xAI

46.2

Rank #65 Confirmed

Step 3.7 Flash

StepFun

37.3

Rank #207 Reported

Summary

They share 1 benchmark with published results for both. Grok 4.20 Multi-Agent scores higher in 2 categories and Step 3.7 Flash in 1 category; 3 gaps are clear of the uncertainty.
The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 43.9 to 21.6.
The biggest single-benchmark swing is NYT Connections (extended): 89.6% for Grok 4.20 Multi-Agent and 39.7% for Step 3.7 Flash.
Step 3.7 Flash is cheaper at $0.18 / $1.11 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 256K.
Step 3.7 Flash has downloadable open weights; the other is API-only.

Side by side

Grok 4.20 Multi-Agent and Step 3.7 Flash specifications
	Grok 4.20 Multi-Agent	Step 3.7 Flash
Provider	xAI	StepFun
Noometry Index	46.2	37.3
Released	2026-03-09	2026-05-29
Weights	Proprietary	Open
Context window	1M	256K
Max output	30K	256K
Input $ / M tokens	$1.25	$0.18
Output $ / M tokens	$2.50	$1.11
Results tracked	20	5

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Category by category

Coding Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 43.0 (#92), Step 3.7 Flash: 40.0 (#150)

Coding benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
SciCode	—	40%
LMArena Coding	1457	—
ALE-Bench	—	694.12

Agentic & Tool Use Not comparable

Grok 4.20 Multi-Agent: —, Step 3.7 Flash: —

Agentic & Tool Use benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
LMArena Search	1204	—

Reasoning Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 43.9 (#48), Step 3.7 Flash: 21.6 (#219)

Reasoning benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
NYT Connections (extended)	89.6%	39.7%
CritPt	—	2.3%
LMArena Hard Prompts	1448	—

Math Step 3.7 Flash leads

Grok 4.20 Multi-Agent: 39.4 (#104), Step 3.7 Flash: 42.9 (#82)

Math benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
MathArena Final-Answer Competitions	—	68.5%
LMArena Math	1442	—

Knowledge Not comparable

Grok 4.20 Multi-Agent: 40.4 (#119), Step 3.7 Flash: —

Knowledge benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
LMArena Expert	1445	—

Multimodal Not comparable

Grok 4.20 Multi-Agent: 40.5 (#48), Step 3.7 Flash: —

Multimodal benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
LMArena Vision	1259	—

Multilingual Not comparable

Grok 4.20 Multi-Agent: 54.4 (#43), Step 3.7 Flash: —

Multilingual benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
LMArena Non-English	1440	—
LMArena Chinese	1475	—
LMArena French	1466	—
LMArena German	1456	—
LMArena Japanese	1405	—
LMArena Korean	1416	—
LMArena Russian	1457	—
LMArena Spanish	1447	—

Instruction Following Not comparable

Grok 4.20 Multi-Agent: 74.8 (#84), Step 3.7 Flash: —

Instruction Following benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
LMArena Instruction Following	1420	—

Long Context Not comparable

Grok 4.20 Multi-Agent: 43.7 (#88), Step 3.7 Flash: —

Long Context benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
LMArena Longer Query	1431	—

Writing & Preference Not comparable

Grok 4.20 Multi-Agent: 64.0 (#59), Step 3.7 Flash: —

Writing & Preference benchmarks
Benchmark	Grok 4.20 Multi-Agent	Step 3.7 Flash
LMArena Text	1450	—
LMArena Creative Writing	1436	—
LMArena Multi-Turn	1452	—

Frequently asked questions

Is Grok 4.20 Multi-Agent better than Step 3.7 Flash?

Which is cheaper, Grok 4.20 Multi-Agent or Step 3.7 Flash?

Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

Is Grok 4.20 Multi-Agent or Step 3.7 Flash better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 43.0 versus 40.0 in the Noometry coding category.

Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 256K.

How many benchmarks do Grok 4.20 Multi-Agent and Step 3.7 Flash share?

1 benchmark has published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Step 3.7 Flash has 5.