OpenAI compatible API · Attested · Public status

MoonshotAI: Kimi K3 vs SpaceXAI: Grok 4.5

MoonshotAI: Kimi K3 vs SpaceXAI: Grok 4.5: 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

SpaceXAI: Grok 4.5 has the lower cheapest prompt+completion route on TrustedRouter. MoonshotAI: Kimi K3 has more provider fallback routes, while MoonshotAI: Kimi K3 has the larger context window. Current TrustedRouter probes show MoonshotAI: Kimi K3 with the lower p50 TTFT.

$12.66/1MMoonshotAI: Kimi K3 cheapest route

$8.44/1MSpaceXAI: Grok 4.5 cheapest route

1433 msMoonshotAI: Kimi K3 fastest measured p50 TTFT via venice

1608 msSpaceXAI: Grok 4.5 fastest measured p50 TTFT via grok

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.

MoonshotAI: Kimi K3SpaceXAI: Grok 4.5

Model idmoonshotai/kimi-k3x-ai/grok-4.5

Publisher Kimi xAI Grok

AI IQ IQ 123#17 IQ 122#19

Context1,048,576 tokens500,000 tokens

Provider routes373

Cheapest route$12.66/1M$8.44/1M

Privacy posturehas provider E2EE routeprovider posture varies

Fastest measured p50 TTFT1433 ms via venice1608 ms via grok

Highest measured throughput71 tok/s via basetennot enough data

Recent route uptime range44.44% to 100.00%100.00%

Modes chat chat

MoonshotAI: Kimi K3 routes

Overview37 endpoints
PricingPrompt and completion rates
ProvidersAll serving providers

SpaceXAI: Grok 4.5 routes

Overview3 endpoints
PricingPrompt and completion 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="moonshotai/kimi-k3",
    messages=messages,
)

Questions

Which should I use, MoonshotAI: Kimi K3 or SpaceXAI: Grok 4.5?

Is MoonshotAI: Kimi K3 or SpaceXAI: Grok 4.5 cheaper?

The current cheapest TrustedRouter route is $12.66/1M for MoonshotAI: Kimi K3 and $8.44/1M for SpaceXAI: Grok 4.5. The comparison uses current catalog prices and updates as provider pricing changes.

Is MoonshotAI: Kimi K3 or SpaceXAI: Grok 4.5 faster?

Current measured p50 time to first token is 1433 ms for MoonshotAI: Kimi K3 and 1608 ms for SpaceXAI: Grok 4.5. These are routed probe measurements, not vendor-advertised speeds, and update as new samples arrive.

Can I test MoonshotAI: Kimi K3 and SpaceXAI: Grok 4.5 with the same API?

Yes. Use the same OpenAI-compatible TrustedRouter base URL and API key, then change only the model id between moonshotai/kimi-k3 and x-ai/grok-4.5. This makes side-by-side evals possible without maintaining two provider integrations.