Moonshot

Kimi K3 API: pricing, base URL and quick setup

Use Kimi K3 on A2Agent with model ID kimi-k3. The catalog lists a 1M context window. Check token rates below and verify the features your app needs.

Specifications and pricing

Model ID	kimi-k3
Platform	Moonshot
Context window	1M
Tagged for	chat, vision
Discount	-20%
Input / 1M tokens	~~$3.00~~$2.40
Output / 1M tokens	~~$15.00~~$12.00

USD per 1M tokens. Final billing depends on your API key group and metered usage.

Cheapest way to use Kimi K3

The official price is $3.00 input and $15.00 output per 1M tokens. On A2Agent it is $2.40 and $12.00. A month of 10M input and 2M output tokens costs $60.00 at the official price and $48.00 on A2Agent.

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.

How it compares within its family

These comparisons use catalog context limits, tags and reference rates, not independent quality benchmarks. Rates can change. Check current pricing above and test your workload; a higher price or a larger context window does not establish better results.

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 can spend more on output tokens than input tokens. It reads images like the rest of the K2.x chat models. For a lower-cost comparison, if your prompts fit inside 256K, K2.6 gives you the same modality for a fraction of the cost.

Other models on this platform

Questions

What is the context window?

1M tokens, four times the 256K of every other Moonshot model sold here.

Why is it so much more expensive?

It lists at $3.00 input and $15.00 output against $0.95 and $4.00 for K2.6. The window is the visible difference; the output rate is where the gap really shows.

Does it read images?

Yes, it carries the vision tag alongside chat.

When should I stay on K2.6 instead?

Whenever the prompt fits in 256K. Same modality, roughly a third of the input rate and a quarter of the output rate.

Billed per token. Top up from $1, no top-up fee.

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