OpenAI compatible API · Attested · Public status

Google: Gemma 4 31B vs Z.ai: GLM 5

Google: Gemma 4 31B vs Z.ai: GLM 5: 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

Google: Gemma 4 31B has the lower published input-plus-output rate, more Credits provider routes, the larger context window and the lower measured p50 time to first token.

$0.45365/1MGoogle: Gemma 4 31B cheapest route

$3.6925/1MZ.ai: GLM 5 cheapest route

384 msGoogle: Gemma 4 31B fastest measured p50 TTFT via friendli

3366 msZ.ai: GLM 5 fastest measured p50 TTFT via streamlake

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: Gemma 4 31BZ.ai: GLM 5

Model idgoogle/gemma-4-31b-itz-ai/glm-5

Publisher Google AI Studio Z.AI

AI IQ IQ 101#109 IQ 107#80

Context262,144 tokens202,752 tokens

Credits provider routes168

Cheapest route$0.45365/1M$3.6925/1M

Cached input$0.03798/1M to $0.26375/1M$0.20045/1M to $0.45365/1M

Privacy posturehas Confidential route (E2EE + ZDR)has ZDR route

Fastest measured p50 TTFT384 ms via friendli3366 ms via streamlake

Highest measured throughput225 tok/s via io-netnot enough data

Recent route uptime range100.00%100.00%

Modes chat chat

Google: Gemma 4 31B routes

Overview16 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Z.ai: GLM 5 routes

Overview8 Credits routes
PricingInput, cached input, and output rates
BenchmarksTrustedRouter and external sources
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 Z.ai: GLM 5?

Google: Gemma 4 31B has the lower published input-plus-output rate, more Credits provider routes, the larger context window and the lower measured p50 time to first token.

Is Google: Gemma 4 31B or Z.ai: GLM 5 cheaper?

The current cheapest TrustedRouter route is $0.45365/1M for Google: Gemma 4 31B and $3.6925/1M for Z.ai: GLM 5. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemma 4 31B or Z.ai: GLM 5 faster?

Current measured p50 time to first token is 384 ms for Google: Gemma 4 31B and 3366 ms for Z.ai: GLM 5. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Google: Gemma 4 31B and Z.ai: GLM 5 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 z-ai/glm-5. This makes side-by-side evals possible without maintaining two provider integrations.