OpenAI compatible API · Attested · Public status

Google: Gemini 3.1 Pro Preview vs Meta: Llama 3.1 8B Instruct

Google: Gemini 3.1 Pro Preview vs Meta: Llama 3.1 8B Instruct: 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

Monthly evidence

Meta: Llama 3.1 8B Instruct has the lower cheapest prompt+completion route on TrustedRouter. Google: Gemini 3.1 Pro Preview has more provider fallback routes, while Google: Gemini 3.1 Pro Preview has the larger context window. Current TrustedRouter probes show Meta: Llama 3.1 8B Instruct with the lower p50 TTFT.

$14.77/1MGoogle: Gemini 3.1 Pro Preview cheapest route

$0.07385/1MMeta: Llama 3.1 8B Instruct cheapest route

2704 msGoogle: Gemini 3.1 Pro Preview fastest measured p50 TTFT via google-ai-studio

1250 msMeta: Llama 3.1 8B Instruct fastest measured p50 TTFT via databricks

Prices and live route measurements can change. Use the monthly reports when you need a stable evidence window, then run a small task-specific eval before choosing a production default.

Google: Gemini 3.1 Pro PreviewMeta: Llama 3.1 8B Instruct

Model idgoogle/gemini-3.1-pro-previewmeta-llama/llama-3.1-8b-instruct

Publisher Google AI Studio Cerebras

AI IQ IQ 127#11 —

Context1,048,576 tokens131,072 tokens

Credits provider routes44

Cheapest route$14.77/1M$0.07385/1M

Cached input$0.211/1M to $0.422/1M$0.211/1M

Privacy posturehas ZDR routeprovider posture varies

Fastest measured p50 TTFT2704 ms via google-ai-studio1250 ms via databricks

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%100.00%

Modes chat chat

Google: Gemini 3.1 Pro Preview routes

Overview4 Credits routes
PricingInput, cached input, and output rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Meta: Llama 3.1 8B Instruct routes

Overview4 Credits routes
PricingInput, cached input, and output 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/gemini-3.1-pro-preview",
    messages=messages,
)

Questions

Which should I use, Google: Gemini 3.1 Pro Preview or Meta: Llama 3.1 8B Instruct?

Is Google: Gemini 3.1 Pro Preview or Meta: Llama 3.1 8B Instruct cheaper?

The current cheapest TrustedRouter route is $14.77/1M for Google: Gemini 3.1 Pro Preview and $0.07385/1M for Meta: Llama 3.1 8B Instruct. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemini 3.1 Pro Preview or Meta: Llama 3.1 8B Instruct faster?

Current measured p50 time to first token is 2704 ms for Google: Gemini 3.1 Pro Preview and 1250 ms for Meta: Llama 3.1 8B Instruct. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Google: Gemini 3.1 Pro Preview and Meta: Llama 3.1 8B Instruct with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between google/gemini-3.1-pro-preview and meta-llama/llama-3.1-8b-instruct. This makes side-by-side evals possible without maintaining two provider integrations.