Google: Gemma 4 31B

google/gemma-4-31b-it

Released Apr 2, 2026262,144 context

$0.14/M input tokens$0.40/M output tokens

Gemma 4 31B Instruct is Google DeepMind's 30.7B dense multimodal model supporting text and image input with text output. Features a 256K token context window, configurable thinking/reasoning mode, native function calling, and multilingual support across 140+ languages. Strong on coding, reasoning, and document understanding tasks. Apache 2.0 license.

Providers for Gemma 4 31B

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for Gemma 4 31B

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Effective Pricing for Gemma 4 31B

Actual cost per million tokens across providers over the past hour

Apps using Gemma 4 31B

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Recent activity on Gemma 4 31B

Total usage per day on OpenRouter

Prompt

873M

Completion

69.7M

Reasoning

4.02M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for Gemma 4 31B

Uptime stats for Gemma 4 31B across all providers

Sample code and API for Gemma 4 31B

OpenRouter normalizes requests and responses across providers for you.

OpenRouter supports reasoning-enabled models that can show their step-by-step thinking process. Use the reasoning parameter in your request to enable reasoning, and access the reasoning_details array in the response to see the model's internal reasoning before the final answer. When continuing a conversation, preserve the complete reasoning_details when passing messages back to the model so it can continue reasoning from where it left off. Learn more about reasoning tokens.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

Gemma 4 31B - API Pricing & Providers | OpenRouter