OpenAI compatible API · Attested · Public status

Google: Gemini 3.1 Pro Preview vs Google: Gemma 4 31B

Compare Google: Gemini 3.1 Pro Preview and Google: Gemma 4 31B by providers, context, price, and TrustedRouter route support.

Verify gateway

Onebase URL to migrate

100sof models and routes

0prompt or output logs. Always.

Compare routesProviders, price, context, and policy posture in one view.

Use auto when uptime mattersKeep a primary model and let fallback handle provider failures.

Same API shapeUse the OpenAI client and set the model you want.

Practical read

Google: Gemma 4 31B has the lower cheapest prompt+completion route on TrustedRouter. Google: Gemma 4 31B has more provider fallback routes, while Google: Gemini 3.1 Pro Preview has the larger context window. Current TrustedRouter probes show Google: Gemma 4 31B with the lower p50 TTFT.

$14.7/1MGoogle: Gemini 3.1 Pro Preview cheapest route

$0.5355/1MGoogle: Gemma 4 31B cheapest route

3097 msGoogle: Gemini 3.1 Pro Preview measured p50 TTFT

1212 msGoogle: Gemma 4 31B measured p50 TTFT

Google: Gemini 3.1 Pro PreviewGoogle: Gemma 4 31B

Model idgoogle/gemini-3.1-pro-previewgoogle/gemma-4-31b-it

PublisherGoogle AI StudioGoogle AI Studio

AI IQ IQ 127#9 IQ 101#65

Context1,048,576 tokens262,144 tokens

Provider routes723

Cheapest route$14.7/1M$0.5355/1M

Privacy posturehas ZDR routehas provider E2EE route

Modes chat chat

Google: Gemini 3.1 Pro Preview routes

Overview7 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Google: Gemma 4 31B routes

Overview23 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

Production choice

Pick a default model. Keep fallback enabled.

TrustedRouter is useful when you know the model you want, but still need provider rollover, budget limits, usage records, and a prompt path you can verify.

OpenAI clientPython

client = OpenAI(
    base_url="https://api.trustedrouter.com/v1",
    api_key="sk-tr-v1-..."
)

response = client.chat.completions.create(
    model="google/gemini-3.1-pro-preview",
    messages=messages,
)