Read tool fails with PDF input despite Mimo v2.5 being multimodal #34840

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1. github-actions

   assigned

   kitlangton

   on Jul 2, 2026
2. github-actions commented on Jul 2, 2026

   

   github-actionsBot

   on Jul 2, 2026 – with GitHub Actions

   Contributor

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   This issue might be a duplicate of existing issues. Please check:

   • Valid PDF tool results can be forwarded to models without PDF input support #21908: PDF tool results forwarded to models without PDF input support — same root cause (model does not support PDF input) and same symptom
   • trying to read pdf files is causing issues #21390: Read tool consistently fails when reading PDF files — similar symptom of PDF reading failure

   If your issue is distinct, please let a maintainer know.
3. Elkeid-me commented on Jul 8, 2026

   

   Elkeid-me

   on Jul 8, 2026

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   It looks like you are using MiMo v2.5 Free from OpenCode Zen. This happens because the metadata for MiMo v2.5 Free is incorrectly configured in models.dev (where OpenCode fetches its default model list):

   [modalities]
   input = ["text", "image", "audio", "video"]
   output = ["text"]

   You can manually add pdf input to your OpenCode configuration to override the default settings:

   {
     "$schema": "https://opencode.ai/config.json",
     "provider": {
       "opencode": {
         "models": {
           "mimo-v2.5-free": {
             "modalities": {
               "input": ["audio", "video", "text", "image", "pdf"]
             }
           }
         }
       }
     }
   }

   BTW, interestingly enough, when using MiMo v2.5 via the official Xiaomi MiMo API, PDF input cannot be enabled this way—even though MiMo v2.5 is advertised as an alternative to the omni-modal MiMo v2 Omni, which is explicitly listed as supporting PDF input on models.dev. Does anyone happen to know why?
4. github-actions commented on Sep 7, 2026

   

   github-actionsBot

   on Sep 7, 2026 – with GitHub Actions

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   To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.
5. github-actions

   closed this as not plannedon Sep 7, 2026