On HTTP 429 from the Anthropic API, you should:
- Retry immediately, indefinitely
- Switch to a different model permanently
- Wait with exponential backoff + jitter
- Cancel the request and alert the user
Show answer and solution
Correct answer: C. Wait with exponential backoff + jitter
429 = rate limit.
**Best practice:** exponential backoff (1s, 2s, 4s...) with random jitter to avoid thundering-herd retries.