OpenAI compatible API · Attested · Public status

OpenAI: GPT-5.5 vs Z.ai: GLM 5 Turbo

Compare OpenAI: GPT-5.5 and Z.ai: GLM 5 Turbo by providers, context, price, and TrustedRouter route support.

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 Turbo has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5 Turbo has more provider fallback routes, while OpenAI: GPT-5.5 has the larger context window. Probe-backed speed data is shown when enough recent samples exist.

$36.75/1MOpenAI: GPT-5.5 cheapest route

$5.46/1MZ.ai: GLM 5 Turbo cheapest route

not enough dataOpenAI: GPT-5.5 measured p50 TTFT

not enough dataZ.ai: GLM 5 Turbo measured p50 TTFT

OpenAI: GPT-5.5Z.ai: GLM 5 Turbo

Model idopenai/gpt-5.5z-ai/glm-5-turbo

PublisherOpenAIZ.AI

AI IQ IQ 133#4 —

Context1,050,000 tokens202,752 tokens

Provider routes45

Cheapest route$36.75/1M$5.46/1M

Privacy posturehas ZDR routeprovider posture varies

Modes chat chat

OpenAI: GPT-5.5 routes

Overview4 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

Z.ai: GLM 5 Turbo routes

Overview5 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://gchircrcif.eu-west-3.awsapprunner.com/v1",
    api_key="sk-tr-v1-..."
)

response = client.chat.completions.create(
    model="openai/gpt-5.5",
    messages=messages,
)