OpenAI compatible API · Attested · Public status

Z.ai: GLM 5.1 vs OpenAI: GPT-5.6 Sol

Compare Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol 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 5.1 has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.1 has more provider fallback routes, while OpenAI: GPT-5.6 Sol has the larger context window. Current TrustedRouter probes show OpenAI: GPT-5.6 Sol with the lower p50 TTFT.

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

$36.75/1MOpenAI: GPT-5.6 Sol cheapest route

2807 msZ.ai: GLM 5.1 measured p50 TTFT

2046 msOpenAI: GPT-5.6 Sol measured p50 TTFT

Z.ai: GLM 5.1OpenAI: GPT-5.6 Sol

Model idz-ai/glm-5.1openai/gpt-5.6-sol

PublisherZ.AIOpenAI

AI IQ IQ 113#30 IQ 135#1

Context204,800 tokens1,050,000 tokens

Provider routes254

Cheapest route$4.263/1M$36.75/1M

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

OpenAI: GPT-5.6 Sol routes

Overview4 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,
)