Grok 4.20

grok-4.20

Grok-4.20 is presented as a high-speed xAI reasoning model with strong agentic tool calling, strict prompt adherence, low hallucination, and a very large context window in third-party cards. It is meant for long-form analysis, deep research, and multi-step agent workflows. The strongest description should emphasize speed plus long-context reasoning, not just raw conversational personality.

Context Window

1M tokens

Maximum Output

30K tokens

Release Date

Mar 9, 2026

Modalities

Grok 4.20 Pricing

Input PriceOutput PriceCache Read
$1.25/M$2.5/M$0.2/M

Grok 4.20 API Capabilities

Reasoning

Supported

Tool calling

Supported

Temperature parameter

Supported

Attachments

Supported

Knowledge Base

—

Endpoint Protocols

Completions APIMessages APIgemini

Grok 4.20 Model Highlights

Grok 4.20 combines reasoning, strict instruction following, image understanding and million-token context for demanding agentic and analytical workloads.

Deliberate Reasoning

The reasoning variant can think before responding, supporting tasks that require multi-step analysis and careful evaluation.

Strict Instruction Following

The model is designed to follow detailed prompts consistently, helping applications enforce task requirements and output constraints.

Multimodal Long Context

Text and image inputs can be analyzed within a 1,000,000-token context window, accommodating extensive source material in one task.

Grok 4.20 Use Cases

Grok 4.20 is suited to complex investigation, long-form technical analysis and multimodal agent workflows requiring precise adherence to instructions.

Complex Technical Investigation

Work through multi-stage engineering or scientific questions, evaluate competing explanations and produce a reasoned conclusion.

Long-Form Document Review

Analyze large document collections against detailed criteria, trace relevant evidence and return a structured assessment.

Multimodal Agent Workflows

Interpret text and visual inputs, reason about the requested objective and carry out controlled multi-step tasks with external systems.

How to Use Grok 4.20 via the TokenHub API

Create API key
import OpenAI from "openai"

const client = new OpenAI({
  apiKey: process.env.TOKENHUB_API_KEY,
  baseURL: "https://us-api.tokenhub.com/v1",
})

const result = await client.chat.completions.create({})
console.log(result.choices[0]?.message?.content)

Grok 4.20 Benchmarks

Grok 4.20 0309 (Reasoning)

Index score
Artificial Analysis Intelligence IndexArtificial Analysis broad capability aggregate36.5
Artificial Analysis Coding IndexArtificial Analysis software task aggregate42.2
Knowledge & Reasoning
GPQAAdvanced science problem solving88.5%
HLEBroad expert-level exam set30%
Coding & Engineering
SciCodeScientific coding challenges44.7%
Terminal-Bench HardHard terminal task execution40.9%
Instruction Following & Agent Tasks
IFBenchPrompt constraint adherence82.9%
AA-LCRLong-context reasoning59%
τ²-BenchAgent workflow tasks96.5%

Metrics sourced from Artificial Analysis

Media and Discussions

Selected public videos and posts related to this model.

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Reddit

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Frequently asked questions about Grok 4.20

Understand what Grok 4.20 is, its best uses, distinguishing strengths, practical tradeoffs, and safe TokenHub integration guidance.

Where does Grok 4.20 sit within its provider’s model family?+

Grok 4.20 is xAI’s high-performance Grok 4.20 model for reasoning, long context, and agentic tool calling. It is a beta model, so validate latency, output consistency, and supported features before production use.

Which production scenarios suit Grok 4.20?+

Best-fit scenarios include reliable execution of multi-step agent workflows, analysis of long documents and datasets, and complex multi-step reasoning. Test representative inputs and define measurable acceptance criteria before production.

What makes Grok 4.20 stand out for analysis of long documents and datasets?+

Key strengths include effective use of tools and function calls, strict adherence to prompts, and configurable reasoning effort. This combination is especially useful for analysis of long documents and datasets.

What tradeoffs should developers consider with Grok 4.20?+

Consider another model when the application needs production behavior that is already fully stabilized, the task is simple enough for a non-reasoning variant, or the workflow cannot include human review for important decisions. Verify important factual, legal, financial, medical, or operational outputs with qualified human review.

How can a team safely start using Grok 4.20 on TokenHub?+

In TokenHub, select the exact model identifier displayed for Grok 4.20, use the endpoint documented for your account, and authenticate with your TokenHub credentials. Check the TokenHub page for the exact Grok identifier, available reasoning controls, tool access, supported inputs, and current beta or release status.

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