OpenAI compatible API · Attested · Public status

Qwen: Qwen3.5-27B vs Z.ai: GLM 5.1

Qwen: Qwen3.5-27B vs Z.ai: GLM 5.1: compare current API pricing, context, provider routes, privacy, p50 latency, and OpenAI-compatible access.

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

Qwen: Qwen3.5-27B has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.1 has more provider fallback routes, while Qwen: Qwen3.5-27B has the larger context window. Current TrustedRouter probes show Z.ai: GLM 5.1 with the lower p50 TTFT.

$2.3625/1MQwen: Qwen3.5-27B cheapest route

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

1280 msQwen: Qwen3.5-27B fastest measured p50 TTFT via deepinfra

1079 msZ.ai: GLM 5.1 fastest measured p50 TTFT via wafer

Qwen: Qwen3.5-27BZ.ai: GLM 5.1

Model idqwen/qwen3.5-27bz-ai/glm-5.1

Publisher DeepInfra Z.AI

AI IQ — IQ 114#32

Context262,144 tokens204,800 tokens

Provider routes824

Cheapest route$2.3625/1M$4.263/1M

Privacy postureprovider posture varieshas confidential-compute route

Fastest measured p50 TTFT1280 ms via deepinfra1079 ms via wafer

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%66.67% to 100.00%

Modes chat chat

Qwen: Qwen3.5-27B routes

Overview8 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

Z.ai: GLM 5.1 routes

Overview24 endpoints
PricingPrompt and completion rates
BenchmarksTrustedRouter and external sources
ProvidersAll serving providers

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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="qwen/qwen3.5-27b",
    messages=messages,
)

Questions

Which should I use, Qwen: Qwen3.5-27B or Z.ai: GLM 5.1?

Is Qwen: Qwen3.5-27B or Z.ai: GLM 5.1 cheaper?

The current cheapest TrustedRouter route is $2.3625/1M for Qwen: Qwen3.5-27B and $4.263/1M for Z.ai: GLM 5.1. The comparison uses current catalog prices and updates as provider pricing changes.

Is Qwen: Qwen3.5-27B or Z.ai: GLM 5.1 faster?

Current measured p50 time to first token is 1280 ms for Qwen: Qwen3.5-27B and 1079 ms for Z.ai: GLM 5.1. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Qwen: Qwen3.5-27B and Z.ai: GLM 5.1 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between qwen/qwen3.5-27b and z-ai/glm-5.1. This makes side-by-side evals possible without maintaining two provider integrations.