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: DeepSeek V4.1 Flash has the lower cheapest prompt+completion route on TrustedRouter. DeepSeek: DeepSeek V4.1 Flash has more provider fallback routes, while DeepSeek: DeepSeek V4.1 Flash has the larger context window. Current TrustedRouter probes show Qwen: Qwen3.5 397B A17B with the lower p50 TTFT.

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

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

1489 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via makora

1112 msQwen: Qwen3.5 397B A17B fastest measured p50 TTFT via digitalocean

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 116#38 —

Context1,048,576 tokens262,144 tokens

Credits provider routes1410

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

Cached input$0.01/1M to $0.162998/1M$0.047475/1M to $0.58025/1M

Privacy posturehas provider E2EE routehas provider E2EE route

Fastest measured p50 TTFT1489 ms via makora1112 ms via digitalocean

Highest measured throughputnot enough datanot enough data

Recent route uptime range85.04% to 100.00%33.33% to 100.00%

Modes chat chat

DeepSeek: DeepSeek V4.1 Flash routes

Overview14 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Qwen: Qwen3.5 397B A17B routes

Overview10 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Related comparisons

Browse every comparison

DeepSeek: DeepSeek V4.1 Flash vs Z.ai: GLM 5.242 combined provider routes
DeepSeek: DeepSeek V4.1 Flash vs Z.ai: GLM 5.341 combined provider routes
DeepSeek: DeepSeek V4.1 Flash vs Z.ai: GLM 5.3 Flash40 combined provider routes
DeepSeek: DeepSeek V4 Flash 0731 vs DeepSeek: DeepSeek V4.1 Flash38 combined provider routes
DeepSeek: DeepSeek V4.1 Flash vs MoonshotAI: Kimi K338 combined provider routes
Qwen: Qwen3.5 397B A17B vs Z.ai: GLM 5.238 combined provider routes
Qwen: Qwen3.5 397B A17B vs Z.ai: GLM 5.337 combined provider routes
DeepSeek: DeepSeek V4.1 Flash vs OpenAI: gpt-oss-120b36 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",
    messages=messages,
)

Questions

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

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 1489 ms for DeepSeek: DeepSeek V4.1 Flash and 1112 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.