OpenAI compatible API · Attested · Public status

DeepSeek: DeepSeek V4.1 Flash vs Kimi K3 Fast on Fireworks

DeepSeek V4.1 Flash has the lower published input-plus-output rate and more Credits provider routes. Their context windows are the same size. There is not enough recent probe data to compare speed. Compare price, speed, context, and privacy.

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 and more Credits provider routes. Their context windows are the same size. There is not enough recent probe data to compare speed.

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

$28.485/1MKimi K3 Fast on Fireworks cheapest route

665 msDeepSeek: DeepSeek V4.1 Flash fastest measured p50 TTFT via deepinfra

not enough dataKimi K3 Fast on Fireworks 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 FlashKimi K3 Fast on Fireworks

Model iddeepseek/deepseek-v4.1-flashmoonshotai/kimi-k3-fast

Publisher DeepSeek Kimi

AI IQ IQ 126#21 —

Context1,048,576 tokens1,048,576 tokens

Credits provider routes241

Cheapest route$0.1266/1M$28.485/1M

Cached input$0.01/1M to $0.205725/1M$0.47475/1M

Privacy posturehas Confidential route (E2EE + ZDR)provider posture varies

Fastest measured p50 TTFT665 ms via deepinfranot 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

Overview24 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

Kimi K3 Fast on Fireworks 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 Kimi K3 Fast on Fireworks?

DeepSeek V4.1 Flash has the lower published input-plus-output rate and more Credits provider routes. Their context windows are the same size. There is not enough recent probe data to compare speed.

Is DeepSeek: DeepSeek V4.1 Flash or Kimi K3 Fast on Fireworks cheaper?

The current cheapest TrustedRouter route is $0.1266/1M for DeepSeek: DeepSeek V4.1 Flash and $28.485/1M for Kimi K3 Fast on Fireworks. The comparison uses current catalog prices and updates as provider pricing changes.

Is DeepSeek: DeepSeek V4.1 Flash or Kimi K3 Fast on Fireworks faster?

Current measured p50 time to first token is 665 ms for DeepSeek: DeepSeek V4.1 Flash and not enough data for Kimi K3 Fast on Fireworks. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test DeepSeek: DeepSeek V4.1 Flash and Kimi K3 Fast on Fireworks 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 moonshotai/kimi-k3-fast. This makes side-by-side evals possible without maintaining two provider integrations.