Heretic Qwen3 VL model exhibits zero-token output issue in Stable Diffusion

A user on Reddit's r/StableDiffusion subreddit has reported a peculiar issue with the "Heretic" version of the Qwen3 VL 4B model. When the `thinking` parameter is set to `false`, the model occasionally fails to generate any text output, resulting in an empty response. This behavior is contrasted with the official Qwen3 VL models, which do not exhibit this zero-token issue but may refuse to process sensitive or explicit images. The user is seeking to understand if this zero-token behavior is reproducible and if it might be related to recent updates in ComfyUI or the model's chat template handling. AI

IMPACT Potential usability issue for Stable Diffusion users employing the Heretic Qwen3 VL model.

RANK_REASON User-reported issue with a specific model variant and software configuration.

Read on r/StableDiffusion →

• ComfyUI
• Heretic
• Qwen3 VL
• Stable Diffusion

• model release

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