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DeepSeek: DeepSeek V4.1 Flash 1017 vs Qwen: Qwen3.5-9B

Try both on us. Starter credit covers your first requests, then one key routes DeepSeek V4.1 Flash 1017 and Qwen3.5-9B. 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 1017 has more Credits provider routes, the larger context window and the lower measured p50 time to first token. Qwen: Qwen3.5-9B has the lower published input-plus-output rate.

$0.1266/1MDeepSeek: DeepSeek V4.1 Flash 1017 cheapest route

$0.110775/1MQwen: Qwen3.5-9B cheapest route

618 msDeepSeek: DeepSeek V4.1 Flash 1017 fastest measured p50 TTFT via baseten

1413 msQwen: Qwen3.5-9B fastest measured p50 TTFT via regolo

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 V4.1 Flash 1017Qwen: Qwen3.5-9B

Model iddeepseek/deepseek-v4.1-flash-1017qwen/qwen3.5-9b

Publisher DeepSeek Alibaba Cloud Model Studio

AI IQ IQ 127#18 IQ 96#139

Context1,048,576 tokens262,144 tokens

Credits provider routes127

Cheapest route$0.1266/1M$0.110775/1M

Cached input$0.01/1M to $0.13715/1M$0.0211/1M

Privacy posturehas Confidential route (E2EE + ZDR)has ZDR route

Fastest measured p50 TTFT618 ms via baseten1413 ms via regolo

Highest measured throughputnot enough datanot enough data

Recent route uptime range94.20% to 100.00%100.00%

Modes chat chat

DeepSeek: DeepSeek V4.1 Flash 1017 routes

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

Qwen: Qwen3.5-9B routes

Overview7 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/deepseek-v4.1-flash-1017",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4.1 Flash 1017 or Qwen: Qwen3.5-9B?

DeepSeek V4.1 Flash 1017 has more Credits provider routes, the larger context window and the lower measured p50 time to first token. Qwen: Qwen3.5-9B has the lower published input-plus-output rate.

Is DeepSeek: DeepSeek V4.1 Flash 1017 or Qwen: Qwen3.5-9B cheaper?

The current cheapest TrustedRouter route is $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash 1017 and $0.110775/1M for Qwen: Qwen3.5-9B. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4.1 Flash 1017 or Qwen: Qwen3.5-9B faster?

Current measured p50 time to first token is 618 ms for DeepSeek: DeepSeek V4.1 Flash 1017 and 1413 ms for Qwen: Qwen3.5-9B. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V4.1 Flash 1017 and Qwen: Qwen3.5-9B 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-v4.1-flash-1017 and qwen/qwen3.5-9b. This makes side-by-side evals possible without maintaining two provider integrations.