anth-rate-limits

# Anthropic Rate Limits ## Overview The Claude API uses token-bucket rate limiting measured in three dimensions: requests per minute (RPM), input tokens per minute (ITPM), and output tokens per minute (OTPM). Limits increase automatically as you move through usage tiers. ## Rate Limit Dimensions | Dimension | Header | Description | |-----------|--------|-------------| | RPM | `anthropic-ratelimit-requests-limit` | Requests per minute | | ITPM | `anthropic-ratelimit-tokens-limit` | Input tokens per minute | | OTPM | `anthropic-ratelimit-tokens-limit` | Output tokens per minute | Limits are per-organization and per-model-class. Cached input tokens do NOT count toward ITPM limits. ## Usage Tiers (Auto-Upgrade) | Tier | Monthly Spend | Key Benefit | |------|---------------|-------------| | Tier 1 (Free) | $0 | Evaluation access | | Tier 2 | $40+ | Higher RPM | | Tier 3 | $200+ | Production-grade limits | | Tier 4 | $2,000+ | High-throughput access | | Scale | Custom | Custom limits via sales | Check your current tier and limits at [console.anthropic.com](https://console.anthropic.com/settings/limits). ## SDK Built-In Retry ```python import anthropic # The SDK retries 429 and 5xx errors automatically (2 retries by default) client = anthropic.Anthropic(max_retries=5) # Increase for high-traffic apps # Disable auto-retry for manual control client = anthropic.Anthropic(max_retries=0) ``` ```typescript const client = new Anthropic({ maxRetries: 5 }); ``` ## Custom Rate ...