Google: Gemma 4 31B (free) — Free API

What is Google: Gemma 4 31B (free)?

Google Gemma 4 31B is a dense 30.7B-parameter multimodal model from Google DeepMind, available free on OpenRouter. Supports text and image input with a 262K context window. Strong on coding, reasoning, and document understanding tasks. Includes native function calling, configurable thinking/reasoning mode, and multilingual support across 140+ languages. Apache 2.0 license. OpenAI-compatible via OpenRouter. Free tier: 200 RPD.

Google: Gemma 4 31B (free) API Code Example

Paste your API key and run. See the config generator for Claude Code, Cursor, and more tools.

from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="google/gemma-4-31b-it:free",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

import OpenAI from "openai";

const openai = new OpenAI({
  baseURL: "https://openrouter.ai/api/v1",
  apiKey: "YOUR_API_KEY",
});

const completion = await openai.chat.completions.create({
  model: "google/gemma-4-31b-it:free",
  messages: [{ role: "user", content: "Hello!" }],
});

console.log(completion.choices[0].message.content);

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "google/gemma-4-31b-it:free",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

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