import requests
r = requests.post(
"https://api.aimlapi.com/v1/chat/completions",
headers={"Authorization": "Bearer " + AIMLAPI_KEY},
json={
"model": "anthropic/claude-opus-4.8-fast",
"messages": [
{
"role": "user",
"content": "Hello!"
}
]
},
)
print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", { method: "POST", headers: { Authorization: `Bearer ${process.env.AIMLAPI_KEY}`, "Content-Type": "application/json", }, body: JSON.stringify({ "model": "anthropic/claude-opus-4.8-fast", "messages": [ { "role": "user", "content": "Hello!" } ] }), }); console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \ -H "Authorization: Bearer $AIMLAPI_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"anthropic/claude-opus-4.8-fast","messages":[{"role":"user","content":"Hello!"}]}'
OpenAI-compatible — swap the base URL and it works with your existing SDK.
| Type | Price |
|---|---|
| Input | |
| Output | |
| Cached input |
Fast mode for Claude Opus 4.8 is a research preview, is available only on the Claude API (first-party), and its pricing stacks with prompt caching and data residency multipliers; it is not available with the Batch API.
| Model | Input | Output | Context | Best for |
|---|---|---|---|---|
Claude Opus 4.8 (Fast) This page | Agentic workflows and structured output | |||
| Complex agentic coding and enterprise workflows | ||||
| Chat + assistants | ||||
| Chat + assistants |