OpenAI compatible API · Attested · Public status

Qwen: Qwen3.5 397B A17B vs Z.ai: GLM 5.3 Flash

Z.ai: GLM 5.3 Flash has the lower published input-plus-output rate, more Credits provider routes, the larger context window and the lower measured p50 time to first token. Compare price, speed, context, and privacy.

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

Monthly evidence

Z.ai: GLM 5.3 Flash has the lower published input-plus-output rate, more Credits provider routes, the larger context window and the lower measured p50 time to first token.

$3.63975/1MQwen: Qwen3.5 397B A17B cheapest route

$0.32705/1MZ.ai: GLM 5.3 Flash cheapest route

1476 msQwen: Qwen3.5 397B A17B fastest measured p50 TTFT via digitalocean

910 msZ.ai: GLM 5.3 Flash fastest measured p50 TTFT via deepinfra

The price comparison adds each route's rate for one million input tokens and one million output tokens; your cost depends on your input/output mix. Prices and live route measurements can change. Use the monthly reports when you need a stable evidence window, then run a small task-specific eval before choosing a production default.

Qwen: Qwen3.5 397B A17BZ.ai: GLM 5.3 Flash

Model idqwen/qwen3.5-397b-a17bz-ai/glm-5.3-flash

Publisher Alibaba Cloud Model Studio Z.AI

AI IQ — IQ 119#45

Context262,144 tokens1,048,576 tokens

Credits provider routes1133

Cheapest route$3.63975/1M$0.32705/1M

Cached input$0.047475/1M to $0.58025/1M$0.015825/1M to $0.076488/1M

Privacy posturehas Confidential route (E2EE + ZDR)has Confidential route (E2EE + ZDR)

Fastest measured p50 TTFT1476 ms via digitalocean910 ms via deepinfra

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%0.00% to 100.00%

Modes chat chat

Qwen: Qwen3.5 397B A17B routes

Overview11 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Z.ai: GLM 5.3 Flash routes

Overview33 Credits routes
PricingInput, cached input, and output rates
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/qwen3.5-397b-a17b",
    messages=messages,
)

Questions

Which should I use, Qwen: Qwen3.5 397B A17B or Z.ai: GLM 5.3 Flash?

Z.ai: GLM 5.3 Flash has the lower published input-plus-output rate, more Credits provider routes, the larger context window and the lower measured p50 time to first token.

Is Qwen: Qwen3.5 397B A17B or Z.ai: GLM 5.3 Flash cheaper?

The current cheapest TrustedRouter route is $3.63975/1M for Qwen: Qwen3.5 397B A17B and $0.32705/1M for Z.ai: GLM 5.3 Flash. The comparison uses current catalog prices and updates as provider pricing changes.

Is Qwen: Qwen3.5 397B A17B or Z.ai: GLM 5.3 Flash faster?

Current measured p50 time to first token is 1476 ms for Qwen: Qwen3.5 397B A17B and 910 ms for Z.ai: GLM 5.3 Flash. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Qwen: Qwen3.5 397B A17B and Z.ai: GLM 5.3 Flash with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between qwen/qwen3.5-397b-a17b and z-ai/glm-5.3-flash. This makes side-by-side evals possible without maintaining two provider integrations.