Rate Limits

Arena enforces account-level rate limits before dispatching requests to an upstream model provider.

Tiers

Limits are assigned to your account, so all of your API keys share the same bucket. A value of 0 means that dimension is not limited. Tier values are subject to change.

Tier	RPM	TPM	RPS	TPS
Tier 1	1,200	1,200,000	10	200,000
Tier 3	4,800	4,000,000	40	500,000
Tier 5	10,000	40,000,000	100	1,000,000

429 responses

When a rate limit is exceeded, Arena returns 429 Too Many Requests without calling the upstream provider.

HTTP/1.1 429 Too Many Requests
Retry-After: 1
X-Arena-Rate-Limit-Dimension: rpm
X-RateLimit-Limit: 1200
X-RateLimit-Remaining: 0
Content-Type: application/json

{
  "error": {
    "code": "rate_limit_exceeded",
    "message": "rate limit exceeded",
    "type": "invalid_request_error",
    "trace_id": "req_abc123def456"
  }
}

Use Retry-After for retry timing and the rate-limit headers to understand which configured limit was hit.

Provider capacity

These are Arena account-level limits. They are separate from upstream provider shared-capacity limits, which may also appear in analytics as provider rate-limit signals.

Changing your tier

To request a different rate-limit tier, contact the Arena team through the Support option in the dashboard sidebar.