Integration with Ollama Local

[TheTwinEsper]

Description

Bug Report: Ollama local model not working in OpenCode Desktop

Description

When using OpenCode Desktop application (Windows), after configuring a local Ollama model, the model appears in the list but returns invalid JSON responses ({ "name": "skill", "arguments": { "name": "build" } }) instead of actual text responses.

Environment

• OpenCode version: 1.2.27
• Operating System: Windows
• Ollama version: Running locally on port 11434
• Model: DanyaVoredom/DanyAI-qwen2.5-coder-3b-instruct:latest

Steps to Reproduce

1. Install OpenCode Desktop for Windows
2. Download a model in Ollama (e.g., ollama run DanyaVoredom/DanyAI-qwen2.5-coder-3b-instruct)
3. Configure opencode.json with Ollama provider:

   {
     "provider": {
       "ollama": {
         "npm": "@ai-sdk/openai-compatible",
         "name": "Ollama (local)",
         "options": {
           "baseURL": "http://localhost:11434/v1"
         },
         "models": {
           "DanyaVoredom/DanyAI-qwen2.5-coder-3b-instruct:latest": {
             "name": "DanyAI Coder 3B",
             "_launch": true
           }
         }
       }
     }
   }

4. Open OpenCode Desktop
5. Select the Ollama model from the model list
6. Send a prompt

Expected Behavior

The model should return a normal text response.

Actual Behavior

The model returns invalid JSON: { "name": "skill", "arguments": { "name": "build" } }

Verification

• Ollama API works correctly (tested via curl)
• The same configuration works with OpenCode CLI (terminal version)
• This appears to be a bug specific to the OpenCode Desktop application

Additional Information

• Similar issue reported in GitHub: Ollama local provider is not appearing #19326 (Ollama local provider is not appearing)
• Issue Unable to connect local Ollama #10961 (Unable to connect local Ollama)
• The CLI version works correctly, only Desktop app has this issue

Screenshots

N/A

Plugins

No response

OpenCode version

No response

Steps to reproduce

No response

Screenshot and/or share link

No response

Operating System

No response

Terminal

No response

[github-actions]

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

• Local Ollama model returns non-human message #12812: Local Ollama model returns non-human message (similar symptom: unexpected/invalid responses from a local Ollama model)
• Ollama subagent executes tool calls correctly but always returns empty text to orchestrator #18423: Ollama subagent executes tool calls correctly but always returns empty text to orchestrator (related unexpected response behavior)

If your issue is distinct from the above, please clarify how it differs. Otherwise, consider adding your details there instead.

[cdvankammen]

Again I am confused.....why is there not a "Ollama local" and or an "Custom OpenAI" option in opencode? during the provider setup there are no local options that allow for confignureing a local ip addresss form what i have been able to find

[Hello-World-Traveler]

I have had same issue { "name": "skill", "arguments": { "name": "build" } } it's something to do with the model however I haven't got this working with Ollama, only using the free models, Opencode started to work.

Recommended by Ollama                                                           
    gemma4                                                                        
      Reasoning and code generation locally, ~12GB           
    qwen3.5                                                                       
      Reasoning, coding, and visual understanding locally, ~14GB

Integration with Ollama Locally would be nice.

[kunningKing11]

@Brendonovich will Ollama Local be added as a model provider option? LM Studio already is.

[marekmalczewski]

I confirm. For Ollama na LM Studio provider result is simillar. Models are not able to run tools:

[jclsn]

I don't see the issue here. My local ollama connection works just fine. Problem is that the local models cannot run tools, but the ollama cloud models can for some reason.

My local gemma4 model is not able to use tools and repeatedly asks me what to do. The cloud models works. I also have to add that the cloud model is served via an ollama instance on the same host (my server) and the local gemma runs on my desktop's larger GPU.

Both are configured the same way

{
  "$schema": "https://opencode.ai/config.json",
  "permission": {
    "edit": "allow",
    "bash": "allow",
    "webfetch": "allow",
    "question": "allow",
    "read": "allow",
    "glob": "allow",
    "write": "allow",
    "task": "allow",
    "todowrite": "allow",
  },
  "provider": {
    "ollama-nas": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "NAS",
      "options": {
        "baseURL": "http://127.0.0.1:11434/v1"
      },
      "models": {
        "gemma4:31b-cloud": {
          "name": "gemma4:31b-cloud",
          "tools": true
        },
      }
    },
    "ollama-desktop": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "Desktop",
      "options": {
        "baseURL": "http://192.168.184.117:11434/v1"
      },
      "models": {
        "gemma4:latest": {
          "name": "gemma4:latest",
          "tools": true
        },
      }
    }

  }
}