Model comparison

Grok 4.20 Multi-Agent vs Sonar

Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 37.8 on the Noometry Index. Sonar costs 1.6× 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. 0 shared benchmarks.

Grok 4.20 Multi-Agent xAI

45.5

Rank #62 Confirmed

Sonar

Perplexity

37.8

Rank #184 Confirmed

Summary

The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 42.4 to 20.3.
Sonar is cheaper at $1 / $1 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 128K.

Side by side

Grok 4.20 Multi-Agent and Sonar specifications
	Grok 4.20 Multi-Agent	Sonar
Provider	xAI	Perplexity
Noometry Index	45.5	37.8
Released	2026-03-09	2024-01-01
Weights	Proprietary	Proprietary
Context window	1M	128K
Max output	30K	4K
Input $ / M tokens	$1.25	$1
Output $ / M tokens	$2.50	$1
Results tracked	20	7

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Category by category

Coding Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 42.4 (#91), Sonar: 35.1 (#217)

Coding benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LiveBench Coding	—	35.1%
LMArena Coding	1458	—

Agentic & Tool Use Not comparable

Grok 4.20 Multi-Agent: —, Sonar: —

Agentic & Tool Use benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LMArena Search	1204	—

Reasoning Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 42.4 (#44), Sonar: 20.3 (#221)

Reasoning benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
NYT Connections (extended)	89.6%	—
LiveBench Reasoning	—	46.3%
LMArena Hard Prompts	1448	—
LiveBench Data Analysis	—	37.9%
LiveBench	—	46.9%

Math Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 36.6 (#106), Sonar: 31.3 (#197)

Math benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LiveBench Math	—	41.6%
LMArena Math	1441	—

Knowledge Not comparable

Grok 4.20 Multi-Agent: 39.7 (#116), Sonar: —

Knowledge benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LMArena Expert	1445	—

Multimodal Not comparable

Grok 4.20 Multi-Agent: 39.8 (#44), Sonar: —

Multimodal benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LMArena Vision	1259	—

Multilingual Not comparable

Grok 4.20 Multi-Agent: 54.6 (#40), Sonar: —

Multilingual benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LMArena Non-English	1440	—
LMArena Chinese	1475	—
LMArena French	1467	—
LMArena German	1456	—
LMArena Japanese	1405	—
LMArena Korean	1416	—
LMArena Russian	1457	—
LMArena Spanish	1447	—

Instruction Following Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 75.0 (#80), Sonar: 71.5 (#146)

Instruction Following benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LiveBench Instruction Following	—	76.2%
LMArena Instruction Following	1420	—

Long Context Not comparable

Grok 4.20 Multi-Agent: 43.7 (#84), Sonar: —

Long Context benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LMArena Longer Query	1430	—

Writing & Preference Grok 4.20 Multi-Agent leads

Grok 4.20 Multi-Agent: 64.1 (#57), Sonar: 52.6 (#166)

Writing & Preference benchmarks
Benchmark	Grok 4.20 Multi-Agent	Sonar
LMArena Text	1450	—
LMArena Creative Writing	1435	—
LMArena Multi-Turn	1451	—
LiveBench Language	—	44.1%

Frequently asked questions

Is Grok 4.20 Multi-Agent better than Sonar?

Which is cheaper, Grok 4.20 Multi-Agent or Sonar?

Sonar is cheaper. It lists at $1 per million input tokens and $1 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.

Is Grok 4.20 Multi-Agent or Sonar better for coding?

Grok 4.20 Multi-Agent scores higher on coding benchmarks: 42.4 versus 35.1 in the Noometry coding category.

Which has the bigger context window?

Grok 4.20 Multi-Agent does, with 1M tokens against 128K.

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

0 benchmarks have published results for both models. Grok 4.20 Multi-Agent has 20 scored results on Noometry and Sonar has 7.