Language modelPreview

Grok 4.20 Multi-Agent

xAI

Released: March 10, 2026
Data date: September 8, 2026

Speed: 105.9 tokens/s
Output throughput
Price: $1.25 · $2.5
Input · Output / 1M tokens
Input: Text, Image
Output: Text

Grok 4.20 Multi-Agent previews xAI’s approach to having several agents research in parallel. The API lists it as an experimental service without an open model release.

The concrete API identifier is grok-4.20-multi-agent-0309. xAI publishes no weights or parameter count. For one controllable reasoning run, use Grok 4.20 Reasoning.

Specifications and access

Specification	Value and source
Weights	ProprietarySource
Access	APISource
Context window	1,000,000 tokensSource
Notes	1M context, multiple agents collaborating in parallel for research, parameter count not disclosedSource
API model ID	grok-4.20-multi-agent-0309Source
Source status	previewSource
Release	2026-03-10Source
Maximum output	not statedSource
Input	Text, ImageSource
Output	TextSource
Tool calling	YesSource
Structured output	YesSource
Model aliases	grok-4.20-multi-agentSource
Reasoning mode	low, medium, highSource

Measurements without matching peer values

These measurements have no matching peer values under the same test conditions. Their original values and sources remain available here.

Output speed (Show measurement, test conditions, and source)

Source value: 105.904489485992
Score: 105.904489485992
Metric: tokens/s
Unit: tokens/s
Direction: Higher is better
Source type: independent-evaluator
Evaluator: Artificial Analysis
Status: active
Retrieved at: 2026-09-08
Methodology: Independent evaluation. unknown; default 10K-input workload only
Context: Artificial Analysis performance timing; output speed is decoded after the first streaming chunk. Provider basis: first-party API. Deprecated model. Artificial Analysis only continues benchmarking the default 10K-input workload.

Source Artificial Analysis

Latency reasoning time (Show measurement, test conditions, and source)

Source value: 0
Score: 0
Metric: seconds
Unit: seconds
Direction: Lower is better
Source type: independent-evaluator
Evaluator: Artificial Analysis
Status: active
Retrieved at: 2026-09-08
Methodology: Independent evaluation. unknown; default 10K-input workload only
Context: Artificial Analysis performance timing; output speed is decoded after the first streaming chunk. Provider basis: first-party API. Deprecated model. Artificial Analysis only continues benchmarking the default 10K-input workload.

Source Artificial Analysis

Latency input time (Show measurement, test conditions, and source)

Source value: 21.329499733
Score: 21.329499733
Metric: seconds
Unit: seconds
Direction: Lower is better
Source type: independent-evaluator
Evaluator: Artificial Analysis
Status: active
Retrieved at: 2026-09-08
Methodology: Independent evaluation. unknown; default 10K-input workload only
Context: Artificial Analysis performance timing; output speed is decoded after the first streaming chunk. Provider basis: first-party API. Deprecated model. Artificial Analysis only continues benchmarking the default 10K-input workload.

Source Artificial Analysis

Answer generation time (end-to-end timing breakdown) (Show measurement, test conditions, and source)

Source value: 4.72123516601376
Score: 4.72123516601376
Metric: seconds
Unit: seconds
Direction: Lower is better
Source type: independent-evaluator
Evaluator: Artificial Analysis
Status: active
Retrieved at: 2026-09-08
Methodology: Independent evaluation. unknown; default 10K-input workload only
Context: Artificial Analysis performance timing; output speed is decoded after the first streaming chunk. Provider basis: first-party API. Deprecated model. Artificial Analysis only continues benchmarking the default 10K-input workload.

Source Artificial Analysis

End-to-end reasoning time component (Show measurement, test conditions, and source)

Source value: 0
Score: 0
Metric: seconds
Unit: seconds
Direction: Lower is better
Source type: independent-evaluator
Evaluator: Artificial Analysis
Status: active
Retrieved at: 2026-09-08
Methodology: Independent evaluation. unknown; default 10K-input workload only
Context: Artificial Analysis performance timing; output speed is decoded after the first streaming chunk. Provider basis: first-party API. Deprecated model. Artificial Analysis only continues benchmarking the default 10K-input workload.

Source Artificial Analysis

End-to-end input time component (Show measurement, test conditions, and source)

Source value: 21.329499733
Score: 21.329499733
Metric: seconds
Unit: seconds
Direction: Lower is better
Source type: independent-evaluator
Evaluator: Artificial Analysis
Status: active
Retrieved at: 2026-09-08
Methodology: Independent evaluation. unknown; default 10K-input workload only
Context: Artificial Analysis performance timing; output speed is decoded after the first streaming chunk. Provider basis: first-party API. Deprecated model. Artificial Analysis only continues benchmarking the default 10K-input workload.

Source Artificial Analysis

Sources and data date

Type	Evidence and data date
Speed	SpaceXAI. Output speed after the first streaming chunk, not total response time. Classified as deprecated by Artificial Analysis. Artificial Analysis maintains only the default 10K-input workload there. Retrieved September 8, 2026. Source: Artificial Analysis · Artificial Analysis (retrieved September 8, 2026)Speed measurement methodology
Price	Base API prices without caching or batch discounts. Higher context tiers and other rates are listed under Costs. Source: Pricing · Model metadata (retrieved September 8, 2026) · xAI developer docs, Grok 4.20 Multi Agent 0309 · Editorial description reviewed October 2, 2026
Input	Documented modalities. Retrieved September 8, 2026. Source: Model documentation · Model metadata (retrieved September 8, 2026) · xAI developer docs, Grok 4.20 Multi Agent 0309 · Editorial description reviewed October 2, 2026
Output	Documented modalities. Retrieved September 8, 2026. Source: Model documentation · Model metadata (retrieved September 8, 2026) · xAI developer docs, Grok 4.20 Multi Agent 0309 · Editorial description reviewed October 2, 2026
Research status	Research date September 8, 2026. 3 source URLs checked. This documents the inspected sources, not an exhaustive inventory of every publication.
Not found in the inspected sources	parameters-billions Original wording xAI does not publish parameter counts on the model page.
Not found in the inspected sources	active-parameters-billions Original wording xAI does not publish active parameter counts on the model page.
Not found in the inspected sources	knowledge-cutoff Original wording The official xAI model page did not state a knowledge cutoff.
Not found in the inspected sources	profile-benchmarks Original wording The exact model documentation page exposed capabilities and pricing but no benchmark table.
Not found in the inspected sources	profile-benchmarks Original wording The system card reports several multi-agent cells as not evaluated; no exact-identity benchmark rows were attached.
Additional source	OpenRouter: Popularity index (derived), CC BY 4.0
Additional source	Vercel AI Gateway: Popularity index (derived), CC BY 4.0
Additional source	Creative Commons Attribution 4.0

Grok 4.20 Multi-Agent

Specifications and access

Measurements without matching peer values

Our tests

Pelican on a bicycle

Popularity

Published prices

Sources and data date