Kimi K3 API: pricing, base URL and quick setup

Specifications and pricing

Prices synced with platform billing (USD per 1M tokens).

Quick setup

curl https://a2agent.me/v1/chat/completions \
  -H "content-type: application/json" \
  -H "authorization: Bearer sk-your-a2agent-key" \
  -d '{
    "model": "kimi-k3",
    "messages": [{"role": "user", "content": "Reply with OK"}]
  }'

Using it from a coding client

Worth it when a single prompt has to hold an entire repository or a long document set. Cap the response length in your client, because the $15.00 output rate is where a 1M session gets expensive.

• Run it in Claude Code
• Run it in Cursor

How it compares within its family

K3 is the top of the Moonshot line here and the only one with a 1M context. K2.5, K2.6 and K2.7 Code all stop at 256K. It is priced to match, at $3.00 per million input tokens and $15.00 output, against $0.95 and $4.00 for K2.6. That is roughly three times the input rate and close to four times the output rate, which makes the output side the one to watch. A chatty agent on K3 burns money faster than a long prompt does. It reads images like the rest of the K2.x chat models. The honest test before choosing it: if your prompts fit inside 256K, K2.6 gives you the same modality for a fraction of the cost.

Other models on this platform

• Kimi K2.5256K
• Kimi K2.6256K
• Kimi K2.7 Code256K

Questions