OpenAI compatible API · Attested · Public status

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

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

Google: Gemini 3.1 Flash Lite 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 has the larger context window. Current TrustedRouter probes show Google: Gemini 3.1 Flash Lite with the lower p50 TTFT.

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

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

845 msGoogle: Gemini 3.1 Flash Lite fastest measured p50 TTFT via google-ai-studio

1079 msZ.ai: GLM 5.1 fastest measured p50 TTFT via wafer

Google: Gemini 3.1 Flash LiteZ.ai: GLM 5.1

Model idgoogle/gemini-3.1-flash-litez-ai/glm-5.1

Publisher Google AI Studio Z.AI

AI IQ IQ 101#65 IQ 114#32

Context1,048,576 tokens204,800 tokens

Provider routes624

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

Privacy posturehas ZDR routehas confidential-compute route

Fastest measured p50 TTFT845 ms via google-ai-studio1079 ms via wafer

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%66.67% to 100.00%

Modes chat chat

Google: Gemini 3.1 Flash Lite routes

Overview6 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

Z.ai: GLM 5.1 routes

Overview24 endpoints
PricingPrompt and completion 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/gemini-3.1-flash-lite",
    messages=messages,
)

Questions

Which should I use, Google: Gemini 3.1 Flash Lite or Z.ai: GLM 5.1?

Is Google: Gemini 3.1 Flash Lite or Z.ai: GLM 5.1 cheaper?

The current cheapest TrustedRouter route is $1.8375/1M for Google: Gemini 3.1 Flash Lite and $4.263/1M for Z.ai: GLM 5.1. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemini 3.1 Flash Lite or Z.ai: GLM 5.1 faster?

Current measured p50 time to first token is 845 ms for Google: Gemini 3.1 Flash Lite and 1079 ms for Z.ai: GLM 5.1. 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 5.1 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-5.1. This makes side-by-side evals possible without maintaining two provider integrations.