Gemma 4 31B (free)

curl https://onerouter.network/v1/chat/completions \
  -H "Authorization: Bearer $ONEROUTER_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemma-4-31b-it:free",
    "messages": [{"role":"user","content":"ping"}],
    "stream": true
  }'

from openai import OpenAI

client = OpenAI(
    base_url="https://onerouter.network/v1",
    api_key="or-live-...",
)

client.chat.completions.create(
    model="google/gemma-4-31b-it:free",
    messages=[{"role": "user", "content": "ping"}],
    stream=True,
)

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://onerouter.network/v1",
  apiKey: process.env.ONEROUTER_KEY,
});

await client.chat.completions.create({
  model: "google/gemma-4-31b-it:free",
  messages: [{ role: "user", content: "ping" }],
  stream: true,
});

# Shell, or "env" in ~/.claude/settings.json.
# Use the BARE host: Claude Code appends /v1/messages itself.

export ONEROUTER_KEY=or-live-YOUR-KEY-HERE
export ANTHROPIC_BASE_URL=https://onerouter.network
export ANTHROPIC_AUTH_TOKEN="$ONEROUTER_KEY"
export ANTHROPIC_MODEL="google/gemma-4-31b-it:free"

claude --model "$ANTHROPIC_MODEL"

# ~/.codex/config.toml, with ONEROUTER_KEY in the environment

model = "google/gemma-4-31b-it:free"
model_provider = "onerouter"

[model_providers.onerouter]
name = "OneRouter"
base_url = "https://onerouter.network/v1"
env_key = "ONEROUTER_KEY"
wire_api = "responses"

// opencode.json — project root, or ~/.config/opencode/opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "onerouter": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "OneRouter",
      "options": {
        "baseURL": "https://onerouter.network/v1",
        "apiKey": "{env:ONEROUTER_KEY}"
      },
      "models": {
        "google/gemma-4-31b-it:free": { "name": "Gemma 4 31B (free)" }
      }
    }
  }
}

{
  "model": "google/gemma-4-31b-it:free",
  "messages": [{ "role": "user", "content": "ping" }],
  "provider": { "only": ["openrouter"] }
}