OpenAI compatible API · Attested · Public status

Qwen: Qwen3.8 27B vs Z.ai: GLM 5.3

Qwen: Qwen3.8 27B vs Z.ai: GLM 5.3: 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

Monthly evidence

Qwen: Qwen3.8 27B has the lower cheapest prompt+completion route on TrustedRouter. Z.ai: GLM 5.3 has more provider fallback routes, while Z.ai: GLM 5.3 has the larger context window. Current TrustedRouter probes show Z.ai: GLM 5.3 with the lower p50 TTFT.

$0.02/1MQwen: Qwen3.8 27B cheapest route

$4.2833/1MZ.ai: GLM 5.3 cheapest route

1937 msQwen: Qwen3.8 27B fastest measured p50 TTFT via engy

1048 msZ.ai: GLM 5.3 fastest measured p50 TTFT via engy

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: Qwen3.8 27BZ.ai: GLM 5.3

Model idqwen/qwen3.8-27bz-ai/glm-5.3

Publisher Novita AI Z.AI

AI IQ IQ 112#51 IQ 123#18

Context1,000,000 tokens1,048,576 tokens

Credits provider routes1222

Cheapest route$0.02/1M$4.2833/1M

Cached input$0.015825/1M to $0.19201/1M$0.1266/1M to $1.02546/1M

Privacy posturehas provider E2EE routehas provider E2EE route

Fastest measured p50 TTFT1937 ms via engy1048 ms via engy

Highest measured throughputnot enough datanot enough data

Recent route uptime range0.00% to 100.00%0.00% to 100.00%

Modes chat chat

Qwen: Qwen3.8 27B routes

Overview12 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Z.ai: GLM 5.3 routes

Overview22 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Related comparisons

Browse every comparison

Z.ai: GLM 5.2 vs Z.ai: GLM 5.356 combined provider routes
DeepSeek: DeepSeek V4 Flash 0731 vs Z.ai: GLM 5.347 combined provider routes
Qwen: Qwen3.8 27B vs Z.ai: GLM 5.246 combined provider routes
MoonshotAI: Kimi K3 vs Z.ai: GLM 5.345 combined provider routes
OpenAI: gpt-oss-120b vs Z.ai: GLM 5.344 combined provider routes
MoonshotAI: Kimi K2.6 vs Z.ai: GLM 5.342 combined provider routes
DeepSeek: DeepSeek V4 Flash 0423 vs Z.ai: GLM 5.341 combined provider routes
Z.ai: GLM 5.3 vs Z.ai: GLM 5.3 Flash41 combined provider routes

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/qwen3.8-27b",
    messages=messages,
)

Questions

Which should I use, Qwen: Qwen3.8 27B or Z.ai: GLM 5.3?

Is Qwen: Qwen3.8 27B or Z.ai: GLM 5.3 cheaper?

The current cheapest TrustedRouter route is $0.02/1M for Qwen: Qwen3.8 27B and $4.2833/1M for Z.ai: GLM 5.3. The comparison uses current catalog prices and updates as provider pricing changes.

Is Qwen: Qwen3.8 27B or Z.ai: GLM 5.3 faster?

Current measured p50 time to first token is 1937 ms for Qwen: Qwen3.8 27B and 1048 ms for Z.ai: GLM 5.3. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Qwen: Qwen3.8 27B and Z.ai: GLM 5.3 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between qwen/qwen3.8-27b and z-ai/glm-5.3. This makes side-by-side evals possible without maintaining two provider integrations.