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Anthropic: Claude Sonnet 5 vs MoonshotAI: Kimi K3

Try both on us. Starter credit covers your first requests, then one key routes Claude Sonnet 5 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

MoonshotAI: Kimi K3 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.

$12.66/1MAnthropic: Claude Sonnet 5 cheapest route

$11.97425/1MMoonshotAI: Kimi K3 cheapest route

2139 msAnthropic: Claude Sonnet 5 fastest measured p50 TTFT via amazon-bedrock

838 msMoonshotAI: Kimi K3 fastest measured p50 TTFT via together

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.

Anthropic: Claude Sonnet 5MoonshotAI: Kimi K3

Model idanthropic/claude-sonnet-5moonshotai/kimi-k3

Publisher Anthropic Kimi

AI IQ IQ 124#33 IQ 127#22

Context1,000,000 tokens1,048,576 tokens

Credits provider routes228

Cheapest route$12.66/1M$11.97425/1M

Cached input$0.211/1M to $0.2321/1M$0.195175/1M to $1.897945/1M

Privacy posturehas ZDR routehas Confidential route (E2EE + ZDR)

Fastest measured p50 TTFT2139 ms via amazon-bedrock838 ms via together

Highest measured throughputnot enough data183 tok/s via lyceum

Recent route uptime range100.00%0.00% to 100.00%

Modes chat messages chat

Anthropic: Claude Sonnet 5 routes

Overview2 Credits routes
PricingInput, cached input, and output rates
ProvidersAll serving providers

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.

OpenAI clientPython

client = OpenAI(
    base_url="https://api.trustedrouter.com/v1",
    api_key="sk-tr-v1-..."
)

response = client.chat.completions.create(
    model="anthropic/claude-sonnet-5",
    messages=messages,
)

Questions

Which should I use, Anthropic: Claude Sonnet 5 or MoonshotAI: Kimi K3?

MoonshotAI: Kimi K3 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 Anthropic: Claude Sonnet 5 or MoonshotAI: Kimi K3 cheaper?

The current cheapest TrustedRouter route is $12.66/1M for Anthropic: Claude Sonnet 5 and $11.97425/1M for MoonshotAI: Kimi K3. The comparison uses current catalog prices and updates as provider pricing changes.

Is Anthropic: Claude Sonnet 5 or MoonshotAI: Kimi K3 faster?

Current measured p50 time to first token is 2139 ms for Anthropic: Claude Sonnet 5 and 838 ms for MoonshotAI: Kimi K3. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test Anthropic: Claude Sonnet 5 and MoonshotAI: Kimi K3 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between anthropic/claude-sonnet-5 and moonshotai/kimi-k3. This makes side-by-side evals possible without maintaining two provider integrations.