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Configure Cline to call the Modellix LLM gateway. Cline supports any OpenAI Compatible endpoint — select that provider, set Base URL to https://llm.modellix.ai/v1, and use Modellix provider/name Model IDs for Chat Completions on POST /v1/chat/completions.
This page covers LLM text only (https://llm.modellix.ai).Modellix model IDs are provider/name (for example openai/gpt-5.5). Enter that full string as the Model ID. See Models & Pricing.

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Set Up Cline

1

Install Cline

Install the official extension (publisher Cline / saoudrizwan, ID saoudrizwan.claude-dev):After install, open the Cline icon in the activity bar (or JetBrains tool window).
2

Get a Modellix API Key

Create a key in the Modellix console. You will paste it into Cline settings (Cline stores provider credentials in the IDE, not as shell OPENAI_* env vars for this flow).
3

Configure OpenAI Compatible

In the Cline panel, open Settings (gear icon). Set:Include /v1 in Base URL. Do not append /chat/completions — Cline adds that path itself.
Use a Modellix API key, not an OpenAI platform key. Do not set Base URL to the media API host (https://api.modellix.ai).
Under Model Configuration, set values that match the model (Cline does not always infer these for custom endpoints):Save settings. Switch Model ID to any other catalog ID (for example anthropic/claude-sonnet-5 or google/gemini-3.6-flash) on the same Base URL — traffic still uses OpenAI-compatible Chat Completions on https://llm.modellix.ai/v1.
You do not need a separate Anthropic Base URL without /v1 for these IDs. Native Anthropic Messages is for the Anthropic SDK and Claude Code.
4

Verify the Connection

If Cline offers Verify, run it after saving Base URL, key, and Model ID.Then send a short task in the Cline panel, for example: list files in the project root and summarize the project in one sentence. A successful run uses tools (such as list files) and returns a reply without auth or model-not-found errors.

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Troubleshooting