OpenAI compatible API · Attested · Public status

Google: Gemini 3.1 Pro Preview vs Z.ai: GLM 5.2

Google: Gemini 3.1 Pro Preview vs Z.ai: GLM 5.2: 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

Z.ai: GLM 5.2 has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.2 has more provider fallback routes, while Google: Gemini 3.1 Pro Preview has the larger context window. Current TrustedRouter probes show Z.ai: GLM 5.2 with the lower p50 TTFT.

$14.7/1MGoogle: Gemini 3.1 Pro Preview cheapest route

$2.289/1MZ.ai: GLM 5.2 cheapest route

2972 msGoogle: Gemini 3.1 Pro Preview fastest measured p50 TTFT via lightning

1111 msZ.ai: GLM 5.2 fastest measured p50 TTFT via parasail

Google: Gemini 3.1 Pro PreviewZ.ai: GLM 5.2

Model idgoogle/gemini-3.1-pro-previewz-ai/glm-5.2

Publisher Google AI Studio Z.AI

AI IQ IQ 127#9 IQ 120#16

Context1,048,576 tokens1,048,576 tokens

Provider routes745

Cheapest route$14.7/1M$2.289/1M

Privacy posturehas ZDR routehas provider E2EE route

Fastest measured p50 TTFT2972 ms via lightning1111 ms via parasail

Highest measured throughput40 tok/s via atlas-cloudnot enough data

Recent route uptime range100.00%84.62% to 100.00%

Modes chat chat

Google: Gemini 3.1 Pro Preview routes

Overview7 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Z.ai: GLM 5.2 routes

Overview45 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-pro-preview",
    messages=messages,
)

Questions

Which should I use, Google: Gemini 3.1 Pro Preview or Z.ai: GLM 5.2?

Is Google: Gemini 3.1 Pro Preview or Z.ai: GLM 5.2 cheaper?

The current cheapest TrustedRouter route is $14.7/1M for Google: Gemini 3.1 Pro Preview and $2.289/1M for Z.ai: GLM 5.2. The comparison uses current catalog prices and updates as provider pricing changes.

Is Google: Gemini 3.1 Pro Preview or Z.ai: GLM 5.2 faster?

Current measured p50 time to first token is 2972 ms for Google: Gemini 3.1 Pro Preview and 1111 ms for Z.ai: GLM 5.2. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Google: Gemini 3.1 Pro Preview and Z.ai: GLM 5.2 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-pro-preview and z-ai/glm-5.2. This makes side-by-side evals possible without maintaining two provider integrations.