OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4.1 Flash vs Qwen 3.5 35B A3B

DeepSeek V4.1 Flash vs Qwen 3.5 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 and the larger context window. There is not enough recent probe data to compare speed.

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

$1.648438/1MQwen 3.5 35B A3B cheapest route

1108 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via together

not enough dataQwen 3.5 35B A3B fastest measured p50 TTFT

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 3.5 35B A3B

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

Publisher DeepSeek Venice

AI IQ IQ 124#23 —

Context1,048,576 tokens256,000 tokens

Credits provider routes191

Cheapest route$0.1266/1M$1.648438/1M

Cached input$0.01/1M to $0.163631/1M$0.164844/1M

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT1108 ms via togethernot enough data

Highest measured throughputnot enough datanot enough data

Recent route uptime range0.00% to 100.00%not enough data

Modes chat decide chat

DeepSeek: DeepSeek V4.1 Flash routes

Overview19 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Qwen 3.5 35B A3B routes

Overview1 Credits 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 3.5 35B A3B?

DeepSeek V4.1 Flash has the lower published input-plus-output rate, more Credits provider routes and the larger context window. There is not enough recent probe data to compare speed.

Is DeepSeek: DeepSeek V4.1 Flash or Qwen 3.5 35B A3B cheaper?

The current cheapest TrustedRouter route is $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash and $1.648438/1M for Qwen 3.5 35B A3B. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4.1 Flash or Qwen 3.5 35B A3B faster?

Current measured p50 time to first token is 1108 ms for DeepSeek: DeepSeek V4.1 Flash and not enough data for Qwen 3.5 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 3.5 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.