OpenAI compatible API · Attested · Public status

deepseek-v4-pro vs Z.ai: GLM 5.3 Flash

deepseek-v4-pro vs Z.ai: GLM 5.3 Flash: 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

Z.ai: GLM 5.3 Flash has the lower published input-plus-output rate and more Credits provider routes. Their context windows are the same size. There is not enough recent probe data to compare speed.

$4.10395/1Mdeepseek-v4-pro cheapest route

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

not enough datadeepseek-v4-pro fastest measured p50 TTFT

1559 msZ.ai: GLM 5.3 Flash fastest measured p50 TTFT via wafer

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.

deepseek-v4-proZ.ai: GLM 5.3 Flash

Model idlightning-ai/deepseek-v4-proz-ai/glm-5.3-flash

Publisher Lightning AI Z.AI

AI IQ IQ 114#45 IQ 116#39

Context1,048,576 tokens1,048,576 tokens

Credits provider routes125

Cheapest route$4.10395/1M$0.32705/1M

Cached inputNot published$0.015825/1M to $0.110775/1M

Privacy postureprovider posture varieshas provider E2EE route

Fastest measured p50 TTFTnot enough data1559 ms via wafer

Highest measured throughputnot enough datanot enough data

Recent route uptime rangenot enough data0.00% to 100.00%

Modes chat chat

deepseek-v4-pro routes

Overview1 Credits routes

Z.ai: GLM 5.3 Flash routes

Overview25 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="lightning-ai/deepseek-v4-pro",
    messages=messages,
)

Questions

Which should I use, deepseek-v4-pro or Z.ai: GLM 5.3 Flash?

Z.ai: GLM 5.3 Flash has the lower published input-plus-output rate and more Credits provider routes. Their context windows are the same size. There is not enough recent probe data to compare speed.

Is deepseek-v4-pro or Z.ai: GLM 5.3 Flash cheaper?

The current cheapest TrustedRouter route is $4.10395/1M for deepseek-v4-pro and $0.32705/1M for Z.ai: GLM 5.3 Flash. The comparison uses current catalog prices and updates as provider pricing changes.

Is deepseek-v4-pro or Z.ai: GLM 5.3 Flash faster?

Current measured p50 time to first token is not enough data for deepseek-v4-pro and 1559 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 deepseek-v4-pro 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 lightning-ai/deepseek-v4-pro and z-ai/glm-5.3-flash. This makes side-by-side evals possible without maintaining two provider integrations.