Grok
xAI profile, latest version intelligence, capability movement, and source-aware release history.
Profile
Grok is xAI's conversational AI assistant with real-time access to X (Twitter) data. Built by Elon Musk's AI company with a focus on wit and curiosity.
Latest Version
grok-voice-think-fast-1.0
Apr 2026
Confidence
75%
estimated
Context
128,000
last known / not captured
Versions
7
documented releases
Current Release Intelligence
Latest published version and metadata capture state
Release
grok-voice-think-fast-1.0
EST confidenceGrok Voice Think Fast 1.0 is now available via the Voice Agent API. This model is designed for fast voice interactions and can be accessed using the model identifier 'grok-voice-think-fast-1.0'.
Decision Fit
Best For
Deep synthesis and research workflows
Avoid If
You primarily need deterministic coding automation
Release Diff
Core fields and capture notes for this release
Version
Context Window
Not captured in this release; showing last known value when available
128,000 tokens
Pricing
Not captured in this release; showing last known value when available
X Premium subscription
Current Capabilities
grok-voice-think-fast-1.0 with previous-release movement
Previous score: 7
Previous score: 5
Previous score: 1
Previous score: 8
Version History
7 releases documented
grok-voice-think-fast-1.0
April 23, 2026
Grok Voice Think Fast 1.0 is now available via the Voice Agent API. This model is designed for fast voice interactions and can be accessed using the model identifier 'grok-voice-think-fast-1.0'.
Grok Imagine API
February 2, 2026
xAI announced the Grok Imagine API, offering state-of-the-art video generation across quality, cost, and latency. This represents a new API capability for video generation built on the Grok platform.
Grok 4.1
November 17, 2025
Grok 4.1 is now available to all users on grok.com, X, and the iOS and Android apps. It is rolling out immediately in Auto mode and can be selected explicitly as 'Grok 4.1' in the model picker. A fast variant, Grok 4.1 Fast, was also introduced along with Agent Tools API for next-generation tool-calling agents.
Grok 4
July 14, 2025
Grok 4 is described as the most intelligent model in the world, featuring native tool use and real-time search integration. It is available to SuperGrok and Premium+ subscribers as well as through the xAI API. A new SuperGrok Heavy tier was also introduced with access to Grok 4 Heavy, the most powerful version of Grok 4.
Grok 2
August 13, 2024
Major capability upgrade. Image generation integrated. Beats Claude 3 Opus and GPT-4o on several benchmarks.
Grok 1.5
March 28, 2024
Significant reasoning improvements. Context window expanded to 128K tokens. Better at math and coding tasks.
Grok 1.0
November 4, 2023
xAI launches Grok. Real-time X data access. Designed to answer questions others refuse. Available to X Premium subscribers.