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DeepSeek: DeepSeek V4.1 Flash 1017 vs Qwen: Qwen3.5 397B A17B

Try both on us. Starter credit covers your first requests, then one key routes DeepSeek V4.1 Flash 1017 and Qwen3.5 397B A17B. 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 the lower published input-plus-output rate, more Credits provider routes, the larger context window and the lower measured p50 time to first token.

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

$3.63975/1MQwen: Qwen3.5 397B A17B cheapest route

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

1649 msQwen: Qwen3.5 397B A17B fastest measured p50 TTFT via scaleway

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 397B A17B

Model iddeepseek/deepseek-v4.1-flash-1017qwen/qwen3.5-397b-a17b

Publisher DeepSeek Alibaba Cloud Model Studio

AI IQ IQ 127#18 —

Context1,048,576 tokens262,144 tokens

Credits provider routes1211

Cheapest route$0.1266/1M$3.63975/1M

Cached input$0.01/1M to $0.13715/1M$0.047475/1M to $0.58025/1M

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

Fastest measured p50 TTFT618 ms via baseten1649 ms via scaleway

Highest measured throughputnot enough datanot enough data

Recent route uptime range94.20% to 100.00%0.00% to 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 397B A17B routes

Overview11 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

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Qwen: Qwen3.5 397B A17B vs Z.ai: GLM 5.344 combined provider routes
Qwen: Qwen3.5 397B A17B vs Z.ai: GLM 5.243 combined provider routes
Qwen: Qwen3.5 397B A17B vs Z.ai: GLM 5.3 Flash43 combined provider routes
DeepSeek: DeepSeek V4.1 Flash 1017 vs MoonshotAI: Kimi K340 combined provider routes
MoonshotAI: Kimi K3 vs Qwen: Qwen3.5 397B A17B39 combined provider routes

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 397B A17B?

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

Is DeepSeek: DeepSeek V4.1 Flash 1017 or Qwen: Qwen3.5 397B A17B cheaper?

The current cheapest TrustedRouter route is $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash 1017 and $3.63975/1M for Qwen: Qwen3.5 397B A17B. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4.1 Flash 1017 or Qwen: Qwen3.5 397B A17B faster?

Current measured p50 time to first token is 618 ms for DeepSeek: DeepSeek V4.1 Flash 1017 and 1649 ms for Qwen: Qwen3.5 397B A17B. 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 397B A17B 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/qwen3.5-397b-a17b. This makes side-by-side evals possible without maintaining two provider integrations.