OpenAI compatible API · Attested · Public status

Google: Gemma 4 31B vs grok-4.20-0309-reasoning

Google: Gemma 4 31B vs grok-4.20-0309-reasoning: compare current API pricing, context, provider routes, privacy, p50 latency, and OpenAI-compatible access.

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: Gemma 4 31B has the larger context window. Current TrustedRouter probes show Google: Gemma 4 31B with the lower p50 TTFT.

$0.504/1MGoogle: Gemma 4 31B cheapest route

$3.9375/1Mgrok-4.20-0309-reasoning cheapest route

1351 msGoogle: Gemma 4 31B fastest measured p50 TTFT via crusoe

2559 msgrok-4.20-0309-reasoning fastest measured p50 TTFT via grok

Google: Gemma 4 31Bgrok-4.20-0309-reasoning

Model idgoogle/gemma-4-31b-itx-ai/grok-4.20-reasoning

Publisher Google AI Studio xAI Grok

AI IQ IQ 101#66 —

Context262,144 tokens0 tokens

Provider routes242

Cheapest route$0.504/1M$3.9375/1M

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT1351 ms via crusoe2559 ms via grok

Highest measured throughput191 tok/s via lightningnot enough data

Recent route uptime range88.89% to 100.00%100.00%

Modes chat chat

Google: Gemma 4 31B routes

Overview24 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

grok-4.20-0309-reasoning routes

Overview2 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

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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/gemma-4-31b-it",
    messages=messages,
)

Questions

Which should I use, Google: Gemma 4 31B or grok-4.20-0309-reasoning?

Is Google: Gemma 4 31B or grok-4.20-0309-reasoning cheaper?

The current cheapest TrustedRouter route is $0.504/1M for Google: Gemma 4 31B and $3.9375/1M for grok-4.20-0309-reasoning. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemma 4 31B or grok-4.20-0309-reasoning faster?

Current measured p50 time to first token is 1351 ms for Google: Gemma 4 31B and 2559 ms for grok-4.20-0309-reasoning. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Google: Gemma 4 31B and grok-4.20-0309-reasoning with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between google/gemma-4-31b-it and x-ai/grok-4.20-reasoning. This makes side-by-side evals possible without maintaining two provider integrations.