OpenAI compatible API · Attested · Public status

Z.ai: GLM 5.1 vs DeepSeek: DeepSeek V3.1 Terminus

Compare Z.ai: GLM 5.1 and DeepSeek: DeepSeek V3.1 Terminus by providers, context, price, and TrustedRouter route support.

Verify gateway

Onebase URL to migrate

100sof models and routes

Noneprompt 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

DeepSeek: DeepSeek V3.1 Terminus has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.1 has more provider fallback routes, while Z.ai: GLM 5.1 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

$1.281/1MDeepSeek: DeepSeek V3.1 Terminus cheapest route

2807 msZ.ai: GLM 5.1 measured p50 TTFT

3278 msDeepSeek: DeepSeek V3.1 Terminus measured p50 TTFT

Z.ai: GLM 5.1DeepSeek: DeepSeek V3.1 Terminus

Model idz-ai/glm-5.1deepseek/deepseek-v3.1-terminus

PublisherZ.AIDeepSeek

AI IQ IQ 113#30 —

Context204,800 tokens163,840 tokens

Provider routes257

Cheapest route$4.263/1M$1.281/1M

Privacy posturehas provider E2EE routeprovider posture varies

Modes chat chat

Z.ai: GLM 5.1 routes

Overview25 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

DeepSeek: DeepSeek V3.1 Terminus routes

Overview7 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,
)