OpenAI compatible API · Attested · Public status

Google: Gemma 4 31B vs Z.ai: GLM 5.3 Flash

Google: Gemma 4 31B vs Z.ai: GLM 5.3 Flash: 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

Z.ai: GLM 5.3 Flash has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.3 Flash has more provider fallback routes, while Z.ai: GLM 5.3 Flash has the larger context window. Current TrustedRouter probes show Google: Gemma 4 31B with the lower p50 TTFT.

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

$0.32705/1MZ.ai: GLM 5.3 Flash cheapest route

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

1163 msZ.ai: GLM 5.3 Flash fastest measured p50 TTFT via friendli

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 5.3 Flash

Model idgoogle/gemma-4-31b-itz-ai/glm-5.3-flash

Publisher Google AI Studio Z.AI

AI IQ IQ 103#80 IQ 116#40

Context262,144 tokens1,048,576 tokens

Credits provider routes1426

Cheapest route$0.4642/1M$0.32705/1M

Cached input$0.03798/1M to $0.211/1M$0.015825/1M to $0.10972/1M

Privacy posturehas provider E2EE routehas provider E2EE route

Fastest measured p50 TTFT979 ms via tinfoil1163 ms via friendli

Highest measured throughput271 tok/s via lightningnot enough data

Recent route uptime range0.00% to 100.00%0.00% to 100.00%

Modes chat chat

Google: Gemma 4 31B routes

Overview14 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Z.ai: GLM 5.3 Flash routes

Overview26 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/gemma-4-31b-it",
    messages=messages,
)

Questions

Which should I use, Google: Gemma 4 31B or Z.ai: GLM 5.3 Flash?

Is Google: Gemma 4 31B or Z.ai: GLM 5.3 Flash cheaper?

The current cheapest TrustedRouter route is $0.4642/1M for Google: Gemma 4 31B and $0.32705/1M for Z.ai: GLM 5.3 Flash. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemma 4 31B or Z.ai: GLM 5.3 Flash faster?

Current measured p50 time to first token is 979 ms for Google: Gemma 4 31B and 1163 ms for Z.ai: GLM 5.3 Flash. 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 5.3 Flash 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-5.3-flash. This makes side-by-side evals possible without maintaining two provider integrations.