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Google: Gemma 4 31B Thinking

gemma-4-31b-it:thinking

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Gemma 4 31B Thinking costs $0.130 per million input tokens and $0.442 per million output tokens, supports 262K context, and is available through the OpenAI-compatible API.

Google's Gemma 4 31B instruction-tuned model with thinking explicitly enabled, exposing reasoning traces for complex multimodal and coding workflows. Requests containing video cost $0.14 per million input tokens and $0.40 per million output tokens.

Modalities

Text + Image + Video → Text

Input / output price

$0.130 / $0.442 per 1M

Context

262K · max output 131K

Capabilities

ReasoningVisionTool callingLong contextOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$0.130
Output$0.442
Cached input$0.130

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00074
Per day
$0.3718
Per month (30 days)
$11.15

Gemma 4 31B Thinking: input $0.13/M · output $0.442/M · cached input $0.13/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "gemma-4-31b-it:thinking", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to gemma-4-31b-it:thinking.

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

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is Gemma 4 31B Thinking billed?
Input is $0.130 and output is $0.442 per million tokens; cached input is $0.130. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
262K tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
Gemma 4 31B Thinking API pricing · GeniusRelay