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DeepSeek: DeepSeek V4 Flash 0423 vs DeepSeek: DeepSeek V4.1 Flash

Try both on us. Starter credit covers your first requests, then one key routes DeepSeek V4 Flash 0423 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.

$0.28485/1MDeepSeek: DeepSeek V4 Flash 0423 cheapest route

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

not enough dataDeepSeek: DeepSeek V4 Flash 0423 fastest measured p50 TTFT

not enough dataDeepSeek: DeepSeek V4.1 Flash 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: DeepSeek V4 Flash 0423DeepSeek: DeepSeek V4.1 Flash

Model iddeepseek/deepseek-v4-flashdeepseek/deepseek-v4.1-flash

Publisher DeepSeek DeepSeek

AI IQ IQ 121#39 IQ 126#22

Context1,048,576 tokens1,048,576 tokens

Credits provider routes1224

Cheapest route$0.28485/1M$0.1266/1M

Cached input$0.01/1M to $0.14348/1M$0.01/1M to $0.1899/1M

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 decide

DeepSeek: DeepSeek V4 Flash 0423 routes

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

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-azure.trustedrouter.com/v1",
    api_key="sk-tr-v1-..."
)

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

Questions

Which should I use, DeepSeek: DeepSeek V4 Flash 0423 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: DeepSeek V4 Flash 0423 or DeepSeek: DeepSeek V4.1 Flash cheaper?

The current cheapest TrustedRouter route is $0.28485/1M for DeepSeek: DeepSeek V4 Flash 0423 and $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4 Flash 0423 or DeepSeek: DeepSeek V4.1 Flash faster?

Current measured p50 time to first token is not enough data for DeepSeek: DeepSeek V4 Flash 0423 and not enough data 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: DeepSeek V4 Flash 0423 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/deepseek-v4-flash and deepseek/deepseek-v4.1-flash. This makes side-by-side evals possible without maintaining two provider integrations.