OpenAI compatible API · Attested · Public status

Z.ai: GLM 5.2 vs OpenAI: GPT-5.6 Terra

Compare Z.ai: GLM 5.2 and OpenAI: GPT-5.6 Terra 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

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 OpenAI: GPT-5.6 Terra has the larger context window. Current TrustedRouter probes show Z.ai: GLM 5.2 with the lower p50 TTFT.

$2.07942/1MZ.ai: GLM 5.2 cheapest route

$18.375/1MOpenAI: GPT-5.6 Terra cheapest route

1832 msZ.ai: GLM 5.2 measured p50 TTFT

1837 msOpenAI: GPT-5.6 Terra measured p50 TTFT

Z.ai: GLM 5.2OpenAI: GPT-5.6 Terra

Model idz-ai/glm-5.2openai/gpt-5.6-terra

PublisherZ.AIOpenAI

AI IQ IQ 120#16 IQ 131#4

Context1,048,576 tokens1,050,000 tokens

Provider routes396

Cheapest route$2.07942/1M$18.375/1M

Privacy posturehas provider E2EE routeprovider posture varies

Modes chat chat

Z.ai: GLM 5.2 routes

Overview39 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

OpenAI: GPT-5.6 Terra routes

Overview6 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-5.2",
    messages=messages,
)