← Models

Grok 4.20

xAI · Grok

xAI's 1M-context multimodal preview lane for research and multi-agent experiments alongside the Grok 4.5 flagship.

Part of Grok family · Other versions: Grok 4.5 , Grok Build 0.1 , Grok 4.3 , Grok 4.1 Fast , Grok Code Fast 1 , Grok 4
Type
multimodal
Context
1M tokens
Max Output
N/A
Status
preview
Input
$1.25/1M tok
Output
$2.5/1M tok
API Access
Yes
License
proprietary
multimodal image-input reasoning coding agentic real-time-data
Released March 2026 · Updated July 10, 2026

Overview

Freshness note: Model capabilities, limits, and pricing can change quickly. This profile is a point-in-time snapshot last verified on July 10, 2026.

Grok 4.20 is an active xAI API preview with single-agent reasoning and multi-agent variants. xAI’s March 10, 2026 release notes say both variants are live, and the current model pages expose API-key, playground, pricing, and regional details without an enterprise-only qualifier. The coordinated Multi-Agent route remains explicitly beta.

The right way to read this page is “active preview research lane.” xAI’s current model pages list the 4.20 variants with a 1M-token context window and public token pricing, while Grok 4.5 is the newer flagship for coding and agentic knowledge work. Treat 4.20 as a deliberate beta evaluation, not the default Grok route.

Capabilities

The clearest documented capabilities today are speed, strict instruction following, image-aware reasoning, large context, and multi-agent research. xAI’s current docs and guides also show 4.20 working with server-side tools such as web_search, x_search, code_execution, collections_search, and remote MCP tools.

The multi-agent variant is especially notable because it turns Grok from a single-model assistant into a coordinated research system. That matters for tasks where multiple sub-questions should be explored in parallel and then synthesized by a lead agent.

Technical Details

xAI’s current official docs support these technical anchors:

  • 1,000,000-token context window on the current model pages.
  • Text and image input with text output.
  • Single-agent reasoning and Multi-Agent Beta routes on the xAI API.
  • active beta model names such as grok-4.20-beta-latest-non-reasoning in current batch examples and grok-4.20-multi-agent-beta-0309 in multi-agent documentation.
  • explicit limits such as no logprobs support on Grok 4.20 models.

The big operational point is that 4.20 should still be treated as preview infrastructure, not as the retirement replacement for ordinary Grok 4, Grok 4.1 Fast, or Grok Code Fast deployments. xAI points older general reasoning migrations at Grok 4.3 and old Grok Code Fast migrations at Grok Build 0.1. New workloads should also evaluate Grok 4.5.

xAI does not publish a separate maximum output-token value on the current 4.20 model pages. Here, maxOutput: 0 means “not separately published.”

Pricing & Access

xAI’s public models page currently lists the 4.20 chat variants at:

  • Input: $1.25 per 1M tokens
  • Output: $2.50 per 1M tokens

Operational notes:

  • Grok 4.20 remains a preview route rather than a settled general-availability default.
  • Multi-agent requests inherit both model-token costs and server-side tool costs.
  • beta multi-agent runs can be materially more expensive than single-agent requests.
  • teams should verify access and billing directly in the current xAI console and docs before production planning.

Access options:

  • xAI API and playground
  • Multi-Agent Beta API route
  • batch and agent-tool workflows where enabled

xAI’s broader API remains OpenAI-compatible, which lowers integration friction once access is available.

Best Use Cases

Grok 4.20 fits best when the real job is research orchestration:

  • Deep research tasks where several sub-questions should be explored in parallel.
  • Multi-source synthesis that benefits from web, X, document, and code tools in one loop.
  • Experimental research agents where a team can tolerate beta-model volatility.
  • Internal evaluation of xAI’s multi-agent direction before wider deployment.

It is less suitable for budget-sensitive production traffic, strict SLAs, or cases where teams need a fully documented stable contract today.

Comparisons

  • Grok 4.5 (xAI): Current flagship for coding and agentic knowledge work.
  • Grok 4.3 (xAI): Lower-cost current route for general, reasoning, and non-reasoning API work.
  • Grok Build 0.1 (xAI): Dedicated coding-agent route for web-development and Grok Code Fast migration workloads.
  • Grok 4 (xAI): Deprecated older premium path; use 4.5 for flagship work or 4.3 for the lower-cost migration route.
  • Claude Opus 4.7 (Anthropic): Stronger choice when governance, documentation depth, and enterprise stability matter more than experimental multi-agent breadth.