OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4 Flash 0731 vs Z.ai: GLM 5.3

DeepSeek V4 Flash 0731 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

DeepSeek: DeepSeek V4 Flash 0731 has the lower cheapest prompt+completion route on TrustedRouter. DeepSeek: DeepSeek V4 Flash 0731 has more provider fallback routes, while DeepSeek: DeepSeek V4 Flash 0731 has the larger context window. Probe-backed speed data is shown when enough recent samples exist.

$0.2743/1MDeepSeek: DeepSeek V4 Flash 0731 cheapest route

$6.119/1MZ.ai: GLM 5.3 cheapest route

1188 msDeepSeek: DeepSeek V4 Flash 0731 fastest measured p50 TTFT via akashml

not enough dataZ.ai: GLM 5.3 fastest measured p50 TTFT

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: DeepSeek V4 Flash 0731Z.ai: GLM 5.3

Model iddeepseek/deepseek-v4-flash-0731z-ai/glm-5.3

Publisher DeepSeek Z.AI

AI IQ — IQ 123#15

Context1,310,720 tokens1,048,576 tokens

Provider routes336

Cheapest route$0.2743/1M$6.119/1M

Privacy posturehas ZDR routeprovider posture varies

Fastest measured p50 TTFT1188 ms via akashmlnot enough data

Highest measured throughput63 tok/s via nextbitnot enough data

Recent route uptime range94.34% to 100.00%not enough data

Modes chat chat

DeepSeek: DeepSeek V4 Flash 0731 routes

Overview33 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

Z.ai: GLM 5.3 routes

Overview6 endpoints
PricingPrompt and completion 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="deepseek/deepseek-v4-flash-0731",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4 Flash 0731 or Z.ai: GLM 5.3?

Is DeepSeek: DeepSeek V4 Flash 0731 or Z.ai: GLM 5.3 cheaper?

The current cheapest TrustedRouter route is $0.2743/1M for DeepSeek: DeepSeek V4 Flash 0731 and $6.119/1M for Z.ai: GLM 5.3. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4 Flash 0731 or Z.ai: GLM 5.3 faster?

Current measured p50 time to first token is 1188 ms for DeepSeek: DeepSeek V4 Flash 0731 and not enough data for Z.ai: GLM 5.3. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V4 Flash 0731 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 deepseek/deepseek-v4-flash-0731 and z-ai/glm-5.3. This makes side-by-side evals possible without maintaining two provider integrations.