Grok 5

xAI's latest flagship reasoning model, unveiled via livestream, with native multi-agent "Colony" orchestration and a 1M-token multimodal context window.

xAI · Frontier/foundation models · model

Published in Feed

Overview

xAI revealed Grok 5 in a livestreamed keynote on October 9, 2026, succeeding Grok 4.7. xAI says Grok 5 was trained with a substantially longer reinforcement-learning run focused on multi-day agentic tasks and introduces "Colony" mode, in which a single Grok 5 session spins up and supervises short-lived sub-agent instances of itself to work on sub-tasks in parallel before merging results. The context window increases to 1,000,000 tokens with text, image, and video input and text-only output. It rolled out the same week to the Grok app, X, the Grok API, Cursor, and GitHub Copilot.

This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.

Key features

  • Colony mode: a Grok 5 session spawns and supervises parallel sub-agent instances of itself
  • 1,000,000-token context window with text, image, and video input
  • Successor to Grok 4.7 (2.1T parameters); xAI has not disclosed Grok 5's parameter count
  • Configurable reasoning effort: low, medium, high (default), xhigh
  • Available day-0 in the Grok app, X, Grok API, Cursor, and GitHub Copilot

Use cases

  • Agentic coding in Cursor, Grok Build, and GitHub Copilot
  • Parallelized multi-step research and engineering tasks via Colony mode
  • Long-document and long-video reasoning at 1M-token context
  • Third-party coding harnesses and model routers via the Grok API

Pricing

$3/million input tokens, $0.75/million cached input, $9/million output below 200K prompt tokens; pricing above 200K context not yet published.

Pricing reflects the source record and may change. Confirm current terms with the provider.

Dates and sources

Released
9 Oct 2026
Record updated
14 Oct 2026
Record last checked
14 Oct 2026

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