Claude Opus 4.7 (Fast) API

Claude Opus 4.7 (Fast) is Anthropic’s high-speed variant of Opus 4.7, designed for faster output and complex, long-running coding workflows.
Context
1M tokens
Input
$39 / 1M
Output
$195 / 1M
Released
May 12, 2026

How to use Claude Opus 4.7 (Fast) API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to anthropic/claude-opus-4.7-fast.
import requests

r = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={"Authorization": "Bearer " + AIMLAPI_KEY},
    json={
      "model": "anthropic/claude-opus-4.7-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-4.7-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-4.7-fast","messages":[{"role":"user","content":"Hello!"}]}'

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Claude Opus 4.7 (Fast) API Pricing

TypePrice
Input
$39 / 1M
Output
$195 / 1M
Cached input
$3.9 / 1M

Fast mode is not available on Claude Opus 4.7; requests with `speed: "fast"` return an error and are billed at standard rates instead.

Claude Opus 4.7 (Fast) vs other models

ModelInputOutputContextBest for
$39 / 1M
$195 / 1M
1M tokens
Agentic workflows and structured output
$6.5 / 1M
$32.5 / 1M
1M tokens
Complex agentic coding and enterprise workflows
$6.5 / 1M
$32.5 / 1M
1M tokens
Chat + assistants
$13 / 1M
$65 / 1M
1M tokens
Chat + assistants

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