OpenAI compatible API · Attested · Public status

Google: Gemini 3 Flash Preview vs OpenAI: gpt-oss-120b

Google: Gemini 3 Flash Preview vs gpt-oss-120b: 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

OpenAI: gpt-oss-120b has the lower cheapest prompt+completion route on TrustedRouter. OpenAI: gpt-oss-120b has more provider fallback routes, while Google: Gemini 3 Flash Preview has the larger context window. Current TrustedRouter probes show OpenAI: gpt-oss-120b with the lower p50 TTFT.

$3.675/1MGoogle: Gemini 3 Flash Preview cheapest route

$0.21735/1MOpenAI: gpt-oss-120b cheapest route

1334 msGoogle: Gemini 3 Flash Preview fastest measured p50 TTFT via google-vertex

1245 msOpenAI: gpt-oss-120b fastest measured p50 TTFT via cloudflare-workers-ai

Google: Gemini 3 Flash PreviewOpenAI: gpt-oss-120b

Model idgoogle/gemini-3-flash-previewopenai/gpt-oss-120b

Publisher Google AI Studio OpenAI

AI IQ IQ 116#26 IQ 105#53

Context1,048,576 tokens131,072 tokens

Provider routes625

Cheapest route$3.675/1M$0.21735/1M

Privacy posturehas ZDR routehas provider E2EE route

Fastest measured p50 TTFT1334 ms via google-vertex1245 ms via cloudflare-workers-ai

Highest measured throughputnot enough data272 tok/s via cerebras

Recent route uptime range80.00% to 100.00%100.00%

Modes chat chat

Google: Gemini 3 Flash Preview routes

Overview6 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

OpenAI: gpt-oss-120b routes

Overview25 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/gemini-3-flash-preview",
    messages=messages,
)

Questions

Which should I use, Google: Gemini 3 Flash Preview or OpenAI: gpt-oss-120b?

Is Google: Gemini 3 Flash Preview or OpenAI: gpt-oss-120b cheaper?

The current cheapest TrustedRouter route is $3.675/1M for Google: Gemini 3 Flash Preview and $0.21735/1M for OpenAI: gpt-oss-120b. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemini 3 Flash Preview or OpenAI: gpt-oss-120b faster?

Current measured p50 time to first token is 1334 ms for Google: Gemini 3 Flash Preview and 1245 ms 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 Flash 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-flash-preview and openai/gpt-oss-120b. This makes side-by-side evals possible without maintaining two provider integrations.