OpenAI compatible API · Attested · Public status

Google: Gemma 4 31B vs gpt-oss-20b

Google: Gemma 4 31B vs gpt-oss-20b: 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

gpt-oss-20b 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 gpt-oss-20b with the lower p50 TTFT.

$0.4642/1MGoogle: Gemma 4 31B cheapest route

$0.065938/1Mgpt-oss-20b cheapest route

1399 msGoogle: Gemma 4 31B fastest measured p50 TTFT via tinfoil

1256 msgpt-oss-20b fastest measured p50 TTFT via lightning

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: Gemma 4 31Bgpt-oss-20b

Model idgoogle/gemma-4-31b-itlightning-ai/gpt-oss-20b

Publisher Google AI Studio Lightning AI

AI IQ IQ 101#83 IQ 100#87

Context262,144 tokens128,000 tokens

Credits provider routes131

Cheapest route$0.4642/1M$0.065938/1M

Cached input$0.02743/1M to $0.1477/1MNot published

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT1399 ms via tinfoil1256 ms via lightning

Highest measured throughputnot enough datanot enough data

Recent route uptime range0.00% to 100.00%100.00%

Modes chat chat

Google: Gemma 4 31B routes

Overview13 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

gpt-oss-20b routes

Overview1 Credits routes

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Google: Gemma 4 31B vs Z.ai: GLM 5.3 Flash33 combined provider routes
Google: Gemma 4 31B vs MoonshotAI: Kimi K2.632 combined provider routes
Google: Gemma 4 31B vs OpenAI: gpt-oss-120b32 combined provider routes
DeepSeek: DeepSeek V4 Flash 0423 vs Google: Gemma 4 31B31 combined provider routes

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 gpt-oss-20b?

Is Google: Gemma 4 31B or gpt-oss-20b cheaper?

The current cheapest TrustedRouter route is $0.4642/1M for Google: Gemma 4 31B and $0.065938/1M for gpt-oss-20b. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemma 4 31B or gpt-oss-20b faster?

Current measured p50 time to first token is 1399 ms for Google: Gemma 4 31B and 1256 ms for gpt-oss-20b. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Google: Gemma 4 31B and gpt-oss-20b 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 lightning-ai/gpt-oss-20b. This makes side-by-side evals possible without maintaining two provider integrations.