Grok AI by xAI: Image and Video Generator Online (2026)

Elon Musk's xAI has built something genuinely impressive with Grok Imagine. The image generator delivers strong prompt adherence at a budget-friendly price, and the video generator is rated 5 stars - the highest tier on Upsampler, tied with Google's Veo 3.1 and Kuaishou's Kling 2.5 Pro.

The problem? Grok is normally locked behind an X Premium subscription ($16/month) or the Grok website with its own account requirements. If you want to use Grok's image and video generation without subscribing to X or creating yet another account, you need an alternative access point.

Upsampler gives you direct access to Grok Imagine for both images and videos - pay per generation with credits, no X subscription, no separate Grok account. Grok is not on the no-signup free image page (that lineup uses models like Z-Image Turbo, Wan 2.2, Qwen Image, and Flux 2 Klein). Grok Imagine Video is available in the dashboard alongside the Free AI Video Generator (Wan and LTX) for trying video with no signup.

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Grok Imagine: What Is Available

Grok Imagine spans three tools on Upsampler: image generation, image editing, and video generation.

Grok Imagine Image - Generation (4 Stars, 2 Credits)

Strong prompt adherence in a lightweight, affordable package. At just 2 credits per generation, Grok Imagine Image is one of the most cost-effective generation models on the platform. It handles photorealistic scenes, illustrations, and stylized content well.

Grok Imagine Image - Editing (4 Stars, 2 Credits)

The same model applied to image editing via prompt-based modifications. Upload an image, describe the change you want, and Grok applies it. Supports prompt editing mode - no mask-based inpainting or outpainting.

Grok Imagine Video - The Default Video Model (5 Stars, 5 Credits/Second)

This is the headline feature. Grok Imagine Video is the default video generation model on Upsampler - the model the platform recommends first when you want to create AI video. The 5-star rating is the highest available, and at 5 credits per second, it offers the best quality-to-price ratio among premium video models.

Key specifications:

• Duration: 2-15 seconds (the most flexible range of any model)
• Modes: Text-to-video and image-to-video
• Audio: Yes, generates synchronized audio
• Aspect ratios: 16:9, 4:3, 1:1, 9:16, 3:4, 3:2, 2:3

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Why Grok Imagine Video Stands Out

Best Value Among 5-Star Models

Compare the 5-star video models on Upsampler:

Grok delivers 5-star quality at 5 credits per second - half the cost of Veo 3.1 (with audio) and cheaper than Kling 2.5 Pro. It also supports the longest single-generation duration at 15 seconds.

Most Flexible Duration

Most video models lock you into fixed durations (5 seconds, 10 seconds). Grok Imagine Video supports anything from 2 to 15 seconds, giving you precise control over clip length. Need a 7-second clip? Generate exactly 7 seconds instead of trimming a 10-second clip or padding a 5-second one.

Widest Aspect Ratio Support

Seven aspect ratios - 16:9, 4:3, 1:1, 9:16, 3:4, 3:2, 2:3 - cover virtually every platform and use case. YouTube (16:9), TikTok (9:16), Instagram feed (1:1, 4:3), and everything in between.

Built-In Audio

Grok generates synchronized audio that matches the visual content. Footsteps, ambient sounds, music, and dialogue-adjacent audio are all generated automatically without post-production.

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How to Use Grok AI on Upsampler

For Image Generation

1. Open the Image Generation tool - Grok is not included on the Free AI Image Generator page
2. Select Grok Imagine Image from the model dropdown
3. Write your prompt - Grok responds well to detailed, specific descriptions
4. Choose your aspect ratio
5. Generate - at 2 credits per image, experiment freely

For Image Editing

1. Open the Image Edit tool - the Free AI Image Editor does not include Grok
2. Upload the image you want to modify
3. Select Grok Imagine Image
4. Describe the changes you want
5. Generate the edited result

For Video Generation

1. Visit the Free AI Video Generator or the Video Generation tool
2. Select Grok Imagine Video (it is the default)
3. Choose text-to-video or image-to-video mode
4. For image-to-video: upload a starting frame (generate one with the Free Image Generator first)
5. Write your prompt describing the motion, camera movement, and scene
6. Set your duration (2-15 seconds) and aspect ratio
7. Generate

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Grok vs. X Premium: Cost Comparison

If all you want from X Premium is Grok's image and video generation, Upsampler gives you the same models at a lower effective cost - plus access to dozens of other models and a complete editing and upscaling toolkit.

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When to Use Grok vs. Other Models

Use Grok Imagine Image when:

• Budget matters - 2 credits is among the cheapest quality generation on the platform
• You need quick, reliable image generation with strong prompt following
• You want consistent quality without overthinking model selection

Use Grok Imagine Video when:

• You need 5-star video quality at the best price
• You want flexible durations (2-15 seconds)
• Audio generation is important
• You need non-standard aspect ratios

Consider alternatives when:

• You need inpainting or outpainting (Grok only supports prompt editing - use Nano Banana 2 or Flux Fill Pro instead)
• You need video extension/video-to-video (use Veo 3.1)
• You need the absolute highest image quality (use Nano Banana Pro or GPT Image 1.5 High)
• You need SVG/vector output (use Recraft V4 SVG)

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Frequently Asked Questions

Do I need an X/Twitter account to use Grok on Upsampler?

No. Upsampler provides direct access to Grok Imagine models without any X or Twitter account. The free tools require no signup at all.

Is Grok Imagine Video really the default video model?

Yes. Grok Imagine Video is the model Upsampler recommends first for video generation. Its combination of 5-star quality, 5 credits/second pricing, flexible durations, and audio generation makes it the best all-around choice.

Can I generate images for free with Grok?

No - Grok Imagine Image uses credits in the Image Generation tool. The Free AI Image Generator offers other models (for example Z-Image Turbo, Wan 2.2, Qwen Image, Flux 2 Klein) with daily GPU minutes and no signup.

How does Grok video compare to Sora 2?

Grok Imagine Video is rated 5 stars vs. Sora 2's 4 stars, costs half as much (5 vs. 10 credits/second), and supports both text-to-video and image-to-video (Sora 2 is text-to-video only). Sora 2 may produce more visually detailed output for text-only prompts, but Grok offers better overall value and flexibility.

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Start Using Grok AI Without an X Subscription

Access xAI's Grok Imagine models for images and videos directly on Upsampler - no X Premium subscription, no separate account, no monthly commitment. One-time credits are available and never expire.

Try video with no signup on the Free AI Video Generator (Wan and LTX), and try image generation with no signup on the Free AI Image Generator. For Grok Imagine images, open the Image Generation tool; for Grok Imagine Video, open the Video Generation tool - no X subscription required.

Use Grok Imagine in the dashboard - 5-star video option, strong image generation, pay per use.