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Decision Models s1-fast (EU) vs MoonshotAI: Kimi K3

Try both on us. Starter credit covers your first requests, then one key routes Decision Models s1-fast (EU) and Kimi K3. Switch by changing the model name.

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

Decision Models s1-fast (EU) has the lower published input-plus-output rate. MoonshotAI: Kimi K3 has more Credits provider routes and the larger context window. There is not enough recent probe data to compare speed.

$0.022155/1MDecision Models s1-fast (EU) cheapest route

$11.97425/1MMoonshotAI: Kimi K3 cheapest route

not enough dataDecision Models s1-fast (EU) fastest measured p50 TTFT

not enough dataMoonshotAI: Kimi K3 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.

Decision Models s1-fast (EU)MoonshotAI: Kimi K3

Model iddecisionmodelsio-eu/s1-fastmoonshotai/kimi-k3

Publisherdecisionmodelsio-eu Kimi

AI IQ — IQ 127#21

Context8,192 tokens1,048,576 tokens

Credits provider routes128

Cheapest route$0.022155/1M$11.97425/1M

Cached inputNot published$0.195175/1M to $1.897945/1M

Privacy postureprovider posture varieshas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFTnot enough datanot enough data

Highest measured throughputnot enough datanot enough data

Recent route uptime rangenot enough datanot enough data

Modes decide chat

Decision Models s1-fast (EU) routes

Overview1 Credits routes

MoonshotAI: Kimi K3 routes

Overview28 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.

POST /api/alpha/decidecurl

curl https://api-azure.trustedrouter.com/api/alpha/decide \
  -H "Authorization: Bearer sk-tr-v1-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "decisionmodelsio-eu/s1-fast",
    "state": "Customer: I was charged twice for order A-1.",
    "questions": {
      "refund": {"type": "boolean", "instructions": "Is a refund requested?"}
    }
  }'

Decision models: the API, the models, the numbers

Questions

Which should I use, Decision Models s1-fast (EU) or MoonshotAI: Kimi K3?

Is Decision Models s1-fast (EU) or MoonshotAI: Kimi K3 cheaper?

The current cheapest TrustedRouter route is $0.022155/1M for Decision Models s1-fast (EU) and $11.97425/1M for MoonshotAI: Kimi K3. The comparison uses current catalog prices and updates as provider pricing changes.

Is Decision Models s1-fast (EU) or MoonshotAI: Kimi K3 faster?

Current measured p50 time to first token is not enough data for Decision Models s1-fast (EU) and not enough data for MoonshotAI: Kimi K3. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Decision Models s1-fast (EU) and MoonshotAI: Kimi K3 with the same API?

Yes. Both take the same request on POST /api/alpha/decide, with the same TrustedRouter base URL and API key, so a side-by-side eval changes only the model id between decisionmodelsio-eu/s1-fast and moonshotai/kimi-k3. Decision Models s1-fast (EU) does not take chat requests.