OpenAI compatible API. Attested gateway. Public status.
Z.ai: GLM 5.1 vs Google: Gemini 3.1 Pro Preview
Compare Z.ai: GLM 5.1 and Google: Gemini 3.1 Pro Preview by providers, context, price, and TrustedRouter route support.
1 URLbase_url migration
100smodels and routes
0prompt logs by default
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 5.1 has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.1 has more provider fallback routes, while Google: Gemini 3.1 Pro Preview has the larger context window. Probe-backed speed data is shown when enough recent samples exist.
$4.466/1MZ.ai: GLM 5.1 cheapest route
$15.4/1MGoogle: Gemini 3.1 Pro Preview cheapest route
2359 msZ.ai: GLM 5.1 measured p50 TTFT
not enough dataGoogle: Gemini 3.1 Pro Preview measured p50 TTFT
Z.ai: GLM 5.1Google: Gemini 3.1 Pro Preview
Model id
z-ai/glm-5.1google/gemini-3.1-pro-preview
PublisherZ.AIGemini
Context202,752 tokens1,048,576 tokens
Provider routes202
Cheapest route$4.466/1M$15.4/1M
Privacy posturehas provider E2EE routeprovider posture varies
Modes
chat
chat
Z.ai: GLM 5.1 routes
- Overview20 endpoints
- PricingPrompt and completion rates
- BenchmarksTrustedRouter and external sources
- ProvidersAll serving providers
Google: Gemini 3.1 Pro Preview routes
- Overview2 endpoints
- PricingPrompt and completion rates
- BenchmarksTrustedRouter and external sources
- 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,
)