Gemma 4 31B API

google/gemma-4-31b-it

Use Gemma 4 31B by Google through the Solo Router API: 256K-token context and streaming. $0.234 per million input tokens and $0.65 per million output tokens, billed from prepaid credit.

Input
$0.234
per 1M tokens
Output
$0.65
per 1M tokens
Cached input
$0.047
per 1M tokens
Context window
256K
tokens
Get an API keyTry in chat

Example request

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

Frequently asked questions

How much does the Gemma 4 31B API cost?

$0.234 per million input tokens and $0.65 per million output tokens, and $0.047 per million cached input tokens. You pay from prepaid credit with no monthly fee.

How do I get Gemma 4 31B API access?

Sign in to Solo Router with Google, create an API key and set "model": "google/gemma-4-31b-it" in a chat-completions request to https://solorouter.ai/api/v1.

What is the context window of Gemma 4 31B?

256,000 tokens.

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