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DeepSeek V4 Pro vs DeepSeek: DeepSeek V4.1 Flash

Try both on us. Starter credit covers your first requests, then one key routes DeepSeek V4 Pro and DeepSeek V4.1 Flash. 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 V4.1 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.

$5.53875/1MDeepSeek V4 Pro cheapest route

$0.1266/1MDeepSeek: DeepSeek V4.1 Flash cheapest route

not enough dataDeepSeek V4 Pro fastest measured p50 TTFT

957 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via together

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 ProDeepSeek: DeepSeek V4.1 Flash

Model iddeepseek-ai/DeepSeek-V4-Prodeepseek/deepseek-v4.1-flash

Publisher DeepSeek DeepSeek

AI IQ IQ 123#31 IQ 126#22

Context1,048,576 tokens1,048,576 tokens

Credits provider routes124

Cheapest route$5.53875/1M$0.1266/1M

Cached inputNot published$0.01/1M to $0.1899/1M

Privacy posturehas ZDR routehas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFTnot enough data957 ms via together

Highest measured throughputnot enough datanot enough data

Recent route uptime range100.00%98.56% to 100.00%

Modes chat chat decide

DeepSeek V4 Pro routes

Overview1 Credits routes

DeepSeek: DeepSeek V4.1 Flash routes

Overview24 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="deepseek-ai/DeepSeek-V4-Pro",
    messages=messages,
)

Questions

Which should I use, DeepSeek V4 Pro or DeepSeek: DeepSeek V4.1 Flash?

DeepSeek V4.1 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 DeepSeek: DeepSeek V4.1 Flash cheaper?

The current cheapest TrustedRouter route is $5.53875/1M for DeepSeek V4 Pro and $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek V4 Pro or DeepSeek: DeepSeek V4.1 Flash faster?

Current measured p50 time to first token is not enough data for DeepSeek V4 Pro and 957 ms for DeepSeek: DeepSeek V4.1 Flash. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek V4 Pro and DeepSeek: DeepSeek V4.1 Flash with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between deepseek-ai/DeepSeek-V4-Pro and deepseek/deepseek-v4.1-flash. This makes side-by-side evals possible without maintaining two provider integrations.