OpenAI compatible API · Attested · Public status

Z.ai: GLM 5.1 vs Google: Gemini 3.1 Flash Lite Preview

Compare Z.ai: GLM 5.1 and Google: Gemini 3.1 Flash Lite Preview by providers, context, price, and TrustedRouter route support.

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

Google: Gemini 3.1 Flash Lite Preview has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.1 has more provider fallback routes, while Google: Gemini 3.1 Flash Lite Preview has the larger context window. Current TrustedRouter probes show Z.ai: GLM 5.1 with the lower p50 TTFT.

$4.263/1MZ.ai: GLM 5.1 cheapest route

$1.8375/1MGoogle: Gemini 3.1 Flash Lite Preview cheapest route

3059 msZ.ai: GLM 5.1 measured p50 TTFT

4767 msGoogle: Gemini 3.1 Flash Lite Preview measured p50 TTFT

Z.ai: GLM 5.1Google: Gemini 3.1 Flash Lite Preview

Model idz-ai/glm-5.1google/gemini-3.1-flash-lite-preview

PublisherZ.AIGoogle AI Studio

AI IQ IQ 114#32 IQ 101#64

Context204,800 tokens1,048,576 tokens

Provider routes233

Cheapest route$4.263/1M$1.8375/1M

Privacy posturehas provider E2EE routeprovider posture varies

Modes chat chat

Z.ai: GLM 5.1 routes

Overview23 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Google: Gemini 3.1 Flash Lite Preview routes

Overview3 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

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="z-ai/glm-5.1",
    messages=messages,
)