GLM-Image - Text Rendering with 0.91 Accuracy

Open-source AI image generator with industry-leading text rendering

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Updated Jul 2026 · Added Jun 2026

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What is Glm Image?

GLM-Image is a state-of-the-art open-source AI image generator developed by Z.AI (Zhipu AI), combining a 9B-parameter autoregressive transformer with a 7B-parameter diffusion decoder. It excels at text rendering with 0.9116 CVTG-2K accuracy and knowledge-intensive content generation, supporting resolutions up to 2048×2048. The tool handles text-to-image generation, image-to-image editing, and multi-subject consistency, making it ideal for users needing photorealistic images with precise text and logical structure embedding.

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Key Features of Glm Image

Hybrid architecture combining autoregressive transformer and diffusion decoder
Industry-leading text rendering with 0.9116 CVTG-2K accuracy
Photorealistic image generation with fine control over details
Bilingual text rendering capabilities
Text-to-Image generation with exceptional prompt adherence
Image-to-Image editing and style transfer
Native support for up to 2048×2048 resolution
Custom sizes from 512px to 2048px
Optimized aspect ratios (1:1, 3:4, 4:3, 16:9)
Knowledge-intensive generation for posters and diagrams
Multi-subject consistency with identity preservation
Instruction following with structured reasoning chain
Dense text rendering for multi-line and multi-region text

Who Should Use Glm Image?

Generate photorealistic images from text prompts

Create educational content with accurate information and logical structures

Design commercial posters with embedded text

Generate scientific diagrams and technical illustrations

Perform image-to-image style transfer

Create images with consistent multi-subject identity

Edit images with precise transformations

Generate content requiring bilingual text rendering

Glm Image: Pros & Cons

✓Pros

State-of-the-art open-source model under Apache-2.0 license
Industry-leading text rendering accuracy among open-source models
Supports high resolutions up to 2048×2048 natively
Unified text-to-image and image-to-image capabilities
Exceptional at knowledge-intensive content generation
Photorealistic quality with fine control over details and textures
Multi-subject consistency and identity preservation
Bilingual text rendering support
Multiple optimized aspect ratios available

Frequently Asked Questions about Glm Image

How accurate is GLM-Image at rendering text in generated images?

GLM-Image scores 0.9116 on the CVTG-2K benchmark, which measures text rendering accuracy in generated images. This performance is industry-leading among open-source image generators, making it suitable for posters, diagrams, and other content where embedded text needs to be legible and correctly spelled.

Can GLM-Image generate images in other languages besides English?

Yes, GLM-Image supports bilingual text rendering, so it can embed text in multiple languages within generated images. The same text accuracy that applies to English applies to other supported languages.

What file formats and resolutions does GLM-Image output?

GLM-Image generates images at custom sizes from 512 pixels up to 2048×2048 pixels natively, with optimized aspect ratios including 1:1, 3:4, 4:3, and 16:9. The facts do not specify which file formats it exports, so check the project documentation or repository before committing to a workflow.

Does GLM-Image handle image-to-image editing, or only text-to-image generation?

GLM-Image supports both text-to-image generation and image-to-image editing. You can use it for style transfer and precise image transformations, alongside generating new images from text prompts.