Claude Code

Claude Code talks to the Anthropic Messages API, which Muna implements. Point it at Muna with a few environment variables.

Configuring Claude Code

export ANTHROPIC_BASE_URL="https://inference.muna.ai"
export ANTHROPIC_AUTH_TOKEN="$MUNA_API_KEY"
export ANTHROPIC_MODEL="@qwen/qwen-3.8-27b"
export ANTHROPIC_DEFAULT_HAIKU_MODEL="@qwen/qwen-3.8-27b"

Then start Claude Code in your project directory:

claude

Claude Code sends background work, like summarizing a conversation, to a smaller “Haiku” model. Muna does not serve Claude models, so set ANTHROPIC_DEFAULT_HAIKU_MODEL to a Muna model too. Otherwise those requests fail.

To keep the settings across sessions, add them to the env block of ~/.claude/settings.json:

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://inference.muna.ai",
    "ANTHROPIC_AUTH_TOKEN": "<your Muna API key>",
    "ANTHROPIC_MODEL": "@qwen/qwen-3.8-27b",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "@qwen/qwen-3.8-27b"
  }
}

Any chat model in Models works. Qwen 3.8 27B is the strongest coding model on Muna today; Gemma 4 26B is faster and cheaper for lighter tasks.

Get Started

Coding Agents

Local Inference

Configuring Claude Code

​Configuring Claude Code

Configuring Claude Code