OpenAI compatible API · Attested · Public status

Google: Gemini 3.1 Flash Lite vs Z.ai: GLM 5.3

Google: Gemini 3.1 Flash Lite has the lower published input-plus-output rate. Z.ai: GLM 5.3 has more Credits provider routes and the lower measured p50 time to first token. Their context windows are the same size. Compare price, speed, context, and privacy.

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

$1.84625/1MGoogle: Gemini 3.1 Flash Lite cheapest route

$3.458818/1MZ.ai: GLM 5.3 cheapest route

1502 msGoogle: Gemini 3.1 Flash Lite fastest measured p50 TTFT via google-vertex

858 msZ.ai: GLM 5.3 fastest measured p50 TTFT via wafer

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 Flash LiteZ.ai: GLM 5.3

Model idgoogle/gemini-3.1-flash-litez-ai/glm-5.3

Publisher Google AI Studio Z.AI

AI IQ IQ 104#94 IQ 125#24

Context1,048,576 tokens1,048,576 tokens

Credits provider routes433

Cheapest route$1.84625/1M$3.458818/1M

Cached input$0.026375/1M$0.1055/1M to $0.96005/1M

Privacy posturehas ZDR routehas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFT1502 ms via google-vertex858 ms via wafer

Highest measured throughputnot enough data153 tok/s via zro

Recent route uptime range100.00%100.00%

Modes chat decide chat

Google: Gemini 3.1 Flash Lite routes

Overview4 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Z.ai: GLM 5.3 routes

Overview33 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/gemini-3.1-flash-lite",
    messages=messages,
)

Questions

Which should I use, Google: Gemini 3.1 Flash Lite or Z.ai: GLM 5.3?

Is Google: Gemini 3.1 Flash Lite or Z.ai: GLM 5.3 cheaper?

The current cheapest TrustedRouter route is $1.84625/1M for Google: Gemini 3.1 Flash Lite and $3.458818/1M for Z.ai: GLM 5.3. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemini 3.1 Flash Lite or Z.ai: GLM 5.3 faster?

Current measured p50 time to first token is 1502 ms for Google: Gemini 3.1 Flash Lite and 858 ms for Z.ai: GLM 5.3. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Google: Gemini 3.1 Flash Lite and Z.ai: GLM 5.3 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-flash-lite and z-ai/glm-5.3. This makes side-by-side evals possible without maintaining two provider integrations.