Grok 4.20 Reasoning is a high-performance model by xAI designed for complex logic and math, scientific and technical analysis, multi-step investigations, and high-stakes tasks where accuracy matters most. It incorporates a 'thinking' mechanism before responding and offers strict prompt adherence alongside agentic tool calling.

Grok 4.3 is a flagship reasoning model from xAI leveraging a four-agent deliberation system where internal sub-agents debate the best response. It features native video input and leverages real-time data streams from the X platform for current-events knowledge. It is optimized for long-document analysis, conversational research, and complex multi-step agentic workflows.

Grok 4.5 is xAI's frontier model built for coding, agentic tasks, and knowledge work. Trained on datasets spanning science, engineering, math, and code (in partnership with Cursor), it features a 1.5 trillion parameter architecture and exceeds comparable models in real-world software engineering tasks.

Grok 4.6 is an incremental flagship upgrade over Grok 4.5, utilizing the same 1.5 trillion parameter foundation but enhanced with superior supervised fine-tuning and reinforcement learning via the Grok Build harness. It brings frontier intelligence to long-running AI agents, complex multi-step tasks, and software development, offering aggressive verification and highly competitive cost-per-task efficiency.

Grok 4.7 is xAI's frontier reasoning model for coding, long-running agentic tasks, professional knowledge work, engineering, computer use, and complex multi-step workflows. It uses a larger base model than Grok 4.6 and was trained with a longer reinforcement-learning run focused on difficult tasks requiring extended execution and self-verification. Grok 4.7 supports a 500K-token context window, text and image understanding, function calling, structured outputs, configurable reasoning effort, and tool-driven agentic workflows.

Grok Imagine Image is xAI's speed-focused image generation and editing model, powered by the Aurora engine. Designed for rapid iteration, brainstorming, and high-volume workflows, it supports both text-to-image and reference-guided editing (accepting up to 5 reference images) in a single endpoint. It natively supports multiple aspect ratios to generate consistent layouts for social media and concept art.

Grok Imagine Image 2.0 is xAI's flagship autoregressive image generation and editing model powered by the Aurora engine. It introduces precise prompt following, sharper typography rendering, and advanced editing features like localized segmentation and Smart Resize. Supporting up to 3 reference images for consistent character and style workflows across multiple 1K or 2K aspect ratios, it is built for top-tier creative control.

Grok Imagine Image Quality is the high-fidelity tier of xAI's earlier image generation lineup. It sacrifices raw generation speed in favor of producing photorealistic, highly detailed visuals with strong prompt adherence, accurate lighting, and cleaner textures. It is commonly used for final-quality renders that do not require the latest 2.0 feature set.

Grok Imagine Video is xAI's foundational multimodal video generation model capable of turning text prompts and static images into dynamic video clips. It supports high-quality visual motion, cinematic camera controls, and clip lengths of up to 10 seconds, establishing the baseline for xAI's video generation capabilities.

Grok Imagine Video 1.5 is xAI's advanced video model built on the Aurora-2 engine. Its standout feature is native one-pass audio generation, which produces synchronized dialogue (lip-sync), sound effects, and background music simultaneously with the video. Supporting resolutions up to 1080p and durations up to 15 seconds, it allows for complex workflows including text-to-video, image-to-video, video extension, and multi-image reference guidance to maintain consistent styles and characters.

Grok TTS 1.0 is xAI's text-to-speech model designed for expressive, multilingual, and low-latency speech synthesis. It supports natural-sounding speech generation with built-in and custom voices, fine-grained delivery control through speech tags, pronunciation control using IPA and phrase replacements, adjustable speaking speed, and character-level timestamps. The model supports both batch and real-time streaming synthesis and can produce high-fidelity audio as well as telephony-optimized output, making it suitable for voice agents, narration, conversational applications, accessibility, call-center systems, and other production speech-generation workloads.

Model	Category	Input	Output	Context	Pricing
XAI: Grok 4.20 836e80dd371f4cbfb37e16f6959fd9ac	text	text, image	text	1M	$1.250 in / $2.500 out
XAI: Grok 4.3 cb6d8adf98954713b13be66d23c74325	text	text, image	text	1M	$1.250 in / $2.500 out
XAI: Grok 4.5 3610f89f5b274bbbb6891a590d3f685d	text	text, image	text	500K	$2.000 in / $6.000 out
XAI: Grok 4.6 377c1539edc94932866bb47c1089d646	text	text, image	text	500K	$2.000 in / $6.000 out
XAI: Grok 4.7 3fbf1bd330094c8bbdfa69f0f32403f9	text	text, file, image	text	500K	$2.000 in / $6.000 out
XAI: Grok Imagine Image 8379a893f2584c798a92e84cb237781d	image	text, image	image	66K	$0.020 / image
XAI: Grok Imagine Image 2.0 e18bf739d52a47999a424865af374069	image	text, image	image	66K	$0.040 / image
XAI: Grok Imagine Image Quality 001e289ba9e2413b97f1de98d8e7d2b5	image	text, image	image	66K	$0.050 / image
XAI: Grok Imagine Video 2f17e1fa702141d7aa2de1332bba115a	video	text, image	video	2K	$0.0500 / sec
XAI: Grok Imagine Video 1.5 af33410fb3c14b89adfb068c40e8d7bd	video	text, image	video, audio	2K	$0.0800 / sec
XAI: Grok TTS 1.0 8b6cded2edd5445794c96df034a35a75	audio	text	audio	4K	$15.000 / 1M chars

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