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DeepSeek V4 Pro 0423 vs Z.ai: GLM 5.1

Try both on us. Starter credit covers your first requests, then one key routes DeepSeek V4 Pro 0423 and GLM 5.1. Switch by changing the model name.

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

DeepSeek V4 Pro 0423 has the lower published input-plus-output rate and the larger context window. Z.ai: GLM 5.1 has more Credits provider routes. There is not enough recent probe data to compare speed.

$4.1145/1MDeepSeek V4 Pro 0423 cheapest route

$4.2833/1MZ.ai: GLM 5.1 cheapest route

not enough dataDeepSeek V4 Pro 0423 fastest measured p50 TTFT

not enough dataZ.ai: GLM 5.1 fastest measured p50 TTFT

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 Pro 0423Z.ai: GLM 5.1

Model iddeepseek/deepseek-v4-pro-0423z-ai/glm-5.1

Publisher DeepSeek Z.AI

AI IQ — IQ 113#62

Context1,048,576 tokens202,752 tokens

Credits provider routes413

Cheapest route$4.1145/1M$4.2833/1M

Cached input$0.1055/1M to $0.34815/1M$0.10339/1M to $0.738648/1M

Privacy posturehas ZDR routehas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFTnot enough datanot enough data

Highest measured throughputnot enough datanot enough data

Recent route uptime rangenot enough datanot enough data

Modes chat chat

DeepSeek V4 Pro 0423 routes

Overview4 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Z.ai: GLM 5.1 routes

Overview13 Credits routes
PricingInput, cached input, and output 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-azure.trustedrouter.com/v1",
    api_key="sk-tr-v1-..."
)

response = client.chat.completions.create(
    model="deepseek/deepseek-v4-pro-0423",
    messages=messages,
)

Questions

Which should I use, DeepSeek V4 Pro 0423 or Z.ai: GLM 5.1?

Is DeepSeek V4 Pro 0423 or Z.ai: GLM 5.1 cheaper?

The current cheapest TrustedRouter route is $4.1145/1M for DeepSeek V4 Pro 0423 and $4.2833/1M for Z.ai: GLM 5.1. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek V4 Pro 0423 or Z.ai: GLM 5.1 faster?

Current measured p50 time to first token is not enough data for DeepSeek V4 Pro 0423 and not enough data for Z.ai: GLM 5.1. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek V4 Pro 0423 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 deepseek/deepseek-v4-pro-0423 and z-ai/glm-5.1. This makes side-by-side evals possible without maintaining two provider integrations.