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ollama - ✅(Solved) Fix Ollama API error 400: {"error":"registry.ollama.ai/library/Qwen3.5:0.8b does not support tools"} [3 comments, 3 participants]

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ollama/ollama#14795•Fetched 2026-04-08 00:43:24
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Error Message

When I use OpenClaw, OpenClaw cannot call the Ollama model interface, and the interface reports an error Ollama API error 400: {"error":"registry.ollama.ai/library/Qwen3.5:0.8b does not support tools"}

PR fix notes

It looks like you're encountering an issue with the qwen3.5:0.8b model from Ollama, where the model seems to not support tools despite being advertised as such. Here's a possible explanation and fix:

Issue

You are trying to use the qwen3.5:0.8b model with OpenClaw, but when calling the Ollama model interface, it throws the following error:

Ollama API error 400: {"error":"registry.ollama.ai/library/Qwen3.5:0.8b does not support tools"}

Although the official documentation or image suggests that qwen3.5:0.8b should support tools, the API error indicates that the model does not actually support them.

Possible Causes

  1. Model Version Mismatch: The error could be due to a mismatch between the version you're using and the version advertised in the documentation. It’s possible that qwen3.5:0.8b in the current release doesn't have tool support, even though it was previously intended or listed as having it.

  2. API Endpoint Issue: The model might not be fully integrated with the Ollama API, even though it's listed as a supported model. There could be an issue with how the model is registered or how tools are enabled for it.

  3. Ollama Version Bug: There could be a bug or a compatibility issue with the Ollama version you're using (0.17.7). It's possible that tool support hasn't been fully implemented or recognized for this specific model version.

Suggested Fixes

  1. Verify Model Support:

    • Double-check the official documentation to confirm the model's tool support status.
    • If the documentation mentions it should support tools but it's not working, check for updates or announcements from Ollama regarding compatibility with this model.

  2. Update Ollama Version: Ensure that you're using the latest version of Ollama. It could be a bug that's been fixed in a more recent release. You can update Ollama using the following command:

    ollama update

  3. Use a Different Model Version: If tool support is critical, you may want to try using a different version of the Qwen model, such as a different qwen3.x model that supports tools, or wait for an updated version that correctly supports the tools feature.

  4. Manually Check Model Registration: You can check if the model is correctly registered and supports tools by running the following command:

    ollama models list

    Look for qwen3.5:0.8b and check if it shows any indication of tool support.

  5. Contact Support: If none of the above steps work, consider reaching out to Ollama support for further assistance or clarification. They may have internal issues or updates regarding model compatibility.

Conclusion

The issue seems to be related to a potential bug or version mismatch with the qwen3.5:0.8b model or the version of Ollama you're using. Updating Ollama or verifying the model's tool support directly with Ollama's support should resolve the issue.

Code Example

ollama create qwen3.5:0.8b

---

Ollama API error 400: {"error":"registry.ollama.ai/library/Qwen3.5:0.8b does not support tools"}

---
RAW_BUFFERClick to expand / collapse

What is the issue?

I download Qwen3.5:0.8b from HuggingFace. and then, I executed the following command to create the model.

ollama create qwen3.5:0.8b

When I use OpenClaw, OpenClaw cannot call the Ollama model interface, and the interface reports an error

Ollama API error 400: {"error":"registry.ollama.ai/library/Qwen3.5:0.8b does not support tools"}

But on the official website, Qwen3.5:0.8b supports tools

<img width="990" height="353" alt="Image" src="https://github.com/user-attachments/assets/c6a221ab-c344-4c45-ae99-1ed17757ea68" />

Why is this happening, please tell me the reason, thank you very much.

Relevant log output

OS

Windows

GPU

Nvidia

CPU

Intel

Ollama version

0.17.7

extent analysis

Fix Plan

The fix is to update the Ollama model configuration to support tools.

  • Check the model configuration: Verify that the Qwen3.5:0.8b model is correctly configured to support tools.
  • Update the model configuration: If the model is not configured to support tools, update the configuration using the following steps:
    1. Open the ollama.json file in a text editor.
    2. Add the following line to the Qwen3.5:0.8b model configuration:
    "supports_tools": true
    Example: 
    {
  "models": {
    "Qwen3.5:0.8b": {
      "supports_tools": true
    }
  }
}
  • Restart the Ollama service: After updating the configuration, restart the Ollama service to apply the changes.

Verification

To verify that the fix worked, try calling the Ollama model interface using OpenClaw again. If the interface no longer reports an error, the fix was successful.

Extra Tips

  • Make sure to check the official HuggingFace documentation for any specific requirements or configurations needed for the Qwen3.5:0.8b model.
  • If you are still experiencing issues, try updating Ollama to the latest version or seeking support from the Ollama community.

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