OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4.1 Flash vs Qwen: Qwen3.5-35B-A3B

DeepSeek V4.1 Flash vs Qwen: Qwen3.5-35B-A3B: 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

$1.2027/1MQwen: Qwen3.5-35B-A3B cheapest route

670 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via pearl

1374 msQwen: Qwen3.5-35B-A3B fastest measured p50 TTFT via parasail

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: Qwen3.5-35B-A3B

Model iddeepseek/deepseek-v4.1-flashqwen/qwen3.5-35b-a3b

Publisher DeepSeek DeepInfra

AI IQ IQ 124#22 —

Context1,048,576 tokens262,144 tokens

Credits provider routes186

Cheapest route$0.1266/1M$1.2027/1M

Cached input$0.01/1M to $0.146118/1M$0.026375/1M to $0.237375/1M

Privacy posturehas provider E2EE routehas ZDR route

Fastest measured p50 TTFT670 ms via pearl1374 ms via parasail

Highest measured throughputnot enough datanot enough data

Recent route uptime range0.00% to 100.00%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: Qwen3.5-35B-A3B routes

Overview6 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",
    messages=messages,
)

Questions

Which should I use, DeepSeek: DeepSeek V4.1 Flash or Qwen: Qwen3.5-35B-A3B?

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: Qwen3.5-35B-A3B cheaper?

The current cheapest TrustedRouter route is $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash and $1.2027/1M for Qwen: Qwen3.5-35B-A3B. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4.1 Flash or Qwen: Qwen3.5-35B-A3B faster?

Current measured p50 time to first token is 670 ms for DeepSeek: DeepSeek V4.1 Flash and 1374 ms for Qwen: Qwen3.5-35B-A3B. 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: Qwen3.5-35B-A3B 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/qwen3.5-35b-a3b. This makes side-by-side evals possible without maintaining two provider integrations.