OpenAI compatible API · Attested · Public status

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

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

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

899 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via io-net

1287 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 FlashQwen: Qwen3.5 397B A17B

Model iddeepseek/deepseek-v4.1-flashqwen/qwen3.5-397b-a17b

Publisher DeepSeek DeepInfra

AI IQ IQ 124#22 —

Context1,048,576 tokens262,144 tokens

Credits provider routes189

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

Cached input$0.01/1M to $0.146118/1M$0.047475/1M to $0.58025/1M

Privacy posturehas provider E2EE routehas provider E2EE route

Fastest measured p50 TTFT899 ms via io-net1287 ms via scaleway

Highest measured throughput153 tok/s via pearlnot enough data

Recent route uptime range0.00% to 100.00%33.33% to 100.00%

Modes chat decide chat

DeepSeek: DeepSeek V4.1 Flash routes

Overview18 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Qwen: Qwen3.5 397B A17B routes

Overview9 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

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Qwen: Qwen3.5 397B A17B vs Z.ai: GLM 5.236 combined provider routes
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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",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4.1 Flash or Qwen: Qwen3.5 397B A17B?

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

The current cheapest TrustedRouter route is $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash 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 or Qwen: Qwen3.5 397B A17B faster?

Current measured p50 time to first token is 899 ms for DeepSeek: DeepSeek V4.1 Flash and 1287 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 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 and qwen/qwen3.5-397b-a17b. This makes side-by-side evals possible without maintaining two provider integrations.