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xAI Updates Grok Models and API Features

xAI has released Grok 4.6 to its API, introduced Grok Bot, and updated several multimedia and API functionalities, including new retirement dates for older models.

By Illumora Editorial

Source · Sep 7, 2026, 10:28 PM · On Illumora · Sep 7, 2026, 10:37 PM

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Read the source →xAI Docs — Release Notes | SpaceXAI Docs
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xAI has announced several updates to its Grok models and API features. These include the release of Grok 4.6, the introduction of Grok Bot, and enhancements to multimedia capabilities, such as grok-imagine-video-1.5 and grok-voice-think-fast-2.0. Additionally, new API functionalities like priority processing and context compaction have been made available.

Key Points

  • Grok 4.6, xAI's frontier model for coding, agentic tasks, and knowledge work, is now available on the xAI API.
  • Grok 4.6 features a 500k context window, supports text and image inputs with text-only output, and has no text output limit.
  • Pricing for Grok 4.6 is $2 per 1M input tokens, $0.50 per 1M cached input tokens, and $6 per 1M output tokens for prompts below 200k tokens.
  • Grok Bot is now available, offering durable AI teammates with persistent cloud computing, messaging, approvals, connectors, and routines.
  • grok-imagine-video-1.5 now supports text-to-video, image-to-video, and reference-to-video, with native 1080p resolution for text-to-video and image-to-video.
  • grok-voice-think-fast-2.0 is now available with Speech to Speech, and grok-voice-latest will route to this model starting August 5, 2026.
  • The grok-imagine-image-quality model will be retired on November 2, 2026, with requests being served by grok-imagine-image-2.0 at a lower price.

Context

According to xAI's release notes, these updates expand the capabilities of their AI models and developer tools. The introduction of Grok 4.6 and Grok Bot aims to enhance performance for complex tasks and provide persistent AI assistance. Multimedia models like grok-imagine-video-1.5 and grok-voice-think-fast-2.0 receive new features, while API improvements focus on efficiency and control for developers.

Why It Matters

These updates offer builders new tools for developing advanced AI applications, particularly in areas requiring extensive context, agentic behavior, and multimedia generation. The pricing structure for Grok 4.6 and the retirement of older models also impact cost considerations and migration strategies for existing projects.

What To Do

  • Review the Grok 4.6 overview for detailed specifications and capabilities.
  • Explore the Grok Bot overview and getting started guide to understand its functionality.
  • Consult the Video Generation, Image-to-Video, and Reference-to-Video documentation for grok-imagine-video-1.5.
  • Check the Speech to Speech documentation for grok-voice-think-fast-2.0.
  • Note the November 2, 2026, retirement date for grok-imagine-image-quality and plan any necessary migrations.

Keep Exploring

/atlas/**grok**-family /atlas/image-models /techniques/multimodal-grounding /techniques/direct-blocks-**grok** /studio?pack=foundation