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Google: Gemini 3.1 Pro Preview vs OpenAI: gpt-oss-120b

Try both on us. Starter credit covers your first requests, then one key routes Gemini 3.1 Pro Preview and gpt-oss-120b. Switch by changing the model name.

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

Google: Gemini 3.1 Pro Preview has the larger context window. gpt-oss-120b has the lower published input-plus-output rate and more Credits provider routes. There is not enough recent probe data to compare speed.

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

$0.211/1MOpenAI: gpt-oss-120b cheapest route

not enough dataGoogle: Gemini 3.1 Pro Preview fastest measured p50 TTFT

not enough dataOpenAI: gpt-oss-120b fastest measured p50 TTFT

The price comparison adds each route's rate for one million input tokens and one million output tokens; your cost depends on your input/output mix. 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 PreviewOpenAI: gpt-oss-120b

Model idgoogle/gemini-3.1-pro-previewopenai/gpt-oss-120b

Publisher Google AI Studio OpenAI

AI IQ IQ 122#34 IQ 98#132

Context1,048,576 tokens131,072 tokens

Credits provider routes323

Cheapest route$14.77/1M$0.211/1M

Cached input$0.211/1M to $0.422/1M$0.015825/1M to $0.1055/1M

Privacy posturehas ZDR routehas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFTnot enough datanot enough data

Highest measured throughputnot enough datanot enough data

Recent route uptime rangenot enough datanot enough data

Modes chat chat

Google: Gemini 3.1 Pro Preview routes

Overview3 Credits routes
PricingInput, cached input, and output rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

OpenAI: gpt-oss-120b routes

Overview23 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-azure.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 OpenAI: gpt-oss-120b?

Is Google: Gemini 3.1 Pro Preview or OpenAI: gpt-oss-120b cheaper?

The current cheapest TrustedRouter route is $14.77/1M for Google: Gemini 3.1 Pro Preview and $0.211/1M for OpenAI: gpt-oss-120b. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemini 3.1 Pro Preview or OpenAI: gpt-oss-120b faster?

Current measured p50 time to first token is not enough data for Google: Gemini 3.1 Pro Preview and not enough data for OpenAI: gpt-oss-120b. 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 OpenAI: gpt-oss-120b 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 openai/gpt-oss-120b. This makes side-by-side evals possible without maintaining two provider integrations.