KC
K3 1 Pro on AtmoRouter — from $1.995 per million input tokens, from $9.975 per million output tokens on a 1.0M context, through one OpenAI-compatible key.
Input · per Mtok
From $1.995
$2.00 official
Output · per Mtok
From $9.975
$10.00 official
Off official
97.3%
Context
1.0M
up to 131K output
Final prices in USD per million tokens. Each tier is compared with official input and output prices.
| Input | Output | Offers |
|---|---|---|
| $1.9950.2% off official | $9.9750.2% off official | 1 |
Offer counts are a snapshot and do not guarantee available capacity.
Updated
Prices vary by available offers. Requests can use any listed tier by default. Set maximum input and output prices in Budgets to limit routing.
Model id
kc/k3.1-pro
Use this exact id in API calls.
Modality
text,image
Prompt caching supported — cached input $0.0055/Mtok.
Protocols
OpenAI Chat Completions
Anthropic Messages endpoint also available for every model.
curl
curl https://atmorouter.dev/v1/chat/completions \
-H "Authorization: Bearer ar-xxxxxxxxxxxx" \
-H "Content-Type: application/json" \
-d '{
"model": "kc/k3.1-pro",
"messages": [{"role": "user", "content": "Say hello in one word."}]
}'Python (OpenAI SDK)
from openai import OpenAI
client = OpenAI(
base_url="https://atmorouter.dev/v1",
api_key="ar-xxxxxxxxxxxx",
)
resp = client.chat.completions.create(
model="kc/k3.1-pro",
messages=[{"role": "user", "content": "Say hello in one word."}],
)
print(resp.choices[0].message.content)Works with anything OpenAI-compatible — Cursor, Cline, LangChain and more. See the cookbook configs at github.com/Micolaabdi/atmorouter-cookbook and the docs for the Anthropic Messages endpoint.
How much does K3 1 Pro cost per million tokens?
AtmoRouter prices start from $1.995 per million input tokens and from $9.975 per million output tokens. The provider's official list rate is $2.00 / $10.00 — AtmoRouter is 97.3% below it.
Does K3 1 Pro support streaming?
Yes — server-sent events on the OpenAI-compatible endpoint, and the Anthropic Messages endpoint streams natively.
Is there a subscription or minimum spend?
No subscription or minimum commitment. Billing uses the selected offer’s rates, and a minimum request charge applies. See Budgets for the current minimum.