OP-5.5 op-5-5
Chat model · direct from vendor · Anthropic-compatible. 22 upstream route(s) with automatic failover, current availability 100.0%. Keep your SDK — change base_url to https://api.lk888.ai and model to op-5-5.
Model ID: op-5-5Chatdirect from vendorAvailability 100.0%22 routesAnthropic compatible
Use it without code
Open it in the Ant Task AI workspace. Same account, same key, same balance. The link carries this model's numeric ID, so it lands directly on the model page.
Endpointsendpoint
POST
https://api.lk888.ai/v1/messagesBase URL: https://api.lk888.ai
Authenticationauth
x-api-key: $LK_API_KEY anthropic-version: 2023-06-01
Send the key in the header above. The gateway also accepts Authorization: Bearer, x-api-key, x-goog-api-key and ?key= — whichever your SDK uses. With several headers present, Bearer wins.
IP allow-listing is available per key (single IP or CIDR). Requests from outside the list return 403 with error.code = ip_not_allowed, are not billed, and echo the source IP so you can add it.
Request examplesexample
Shell / cURL
curl -X POST 'https://api.lk888.ai/v1/messages' \
-H 'x-api-key: $LK_API_KEY' \
-H 'anthropic-version: 2023-06-01' \
-H 'Content-Type: application/json' \
-d '{"model":"op-5-5","max_tokens":256,"messages":[{"role":"user","content":"Hello"}]}'Python
import anthropic
client = anthropic.Anthropic(base_url="https://api.lk888.ai", api_key="sk-xxx")
r = client.messages.create(model="op-5-5", max_tokens=256, messages=[{"role":"user","content":"Hello"}])
print(r.content[0].text)Node
const r = await fetch("https://api.lk888.ai/v1/messages",{method:"POST",
headers:{"Authorization":"Bearer sk-xxx","Content-Type":"application/json"},
body:JSON.stringify({"model":"op-5-5","max_tokens":256,"messages":[{"role":"user","content":"Hello"}]})});
console.log(await r.json());
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All models · Get an API key · Model Radar · © 2026 Ant Task AI
All models · Get an API key · Model Radar · © 2026 Ant Task AI