OpenAI HTTP 429 Rate limit

OpenAI 429 — Rate limit exceeded

What this error means

OpenAI throttles by requests-per-minute and tokens-per-minute per model. Parallel agent calls trip it in bursts.

Example error message

{
  "error": {
    "message": "Rate limit reached for requests. Limit 3500 per min.",
    "type": "requests",
    "code": "rate_limit_exceeded"
  }
}

RPM or TPM — which limit am I hitting?

The error names it: "requests" is per-minute request cap, "tokens" is per-minute token cap.

Code	Error	Affected teams / 30 days
401	OpenAI 401 — Invalid authentication	55	View
400	OpenAI 400 — Context length exceeded	34	View
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Provider	Code	Error	Type	Affected teams / 30 days
Google Gemini	429	Gemini 429 — You exceeded your current quota	Rate limit	120	View
OpenRouter	404	OpenRouter 404 — No endpoints found for model	Model unavailable	80	View
OpenRouter	402	OpenRouter 402 — Insufficient credits	Billing / quota	70	View
OpenAI	429	OpenAI 429 — Rate limit exceeded	Rate limit	68	View
OpenAI	401	OpenAI 401 — Invalid authentication	Authentication	55	View
DeepSeek	400	DeepSeek 400 — reasoning_content must be passed	Bad request	48	View
Google Gemini	400	Gemini 400 — Function call missing a thought_signature	Bad request	42	View
Google Gemini	503	Gemini 503 — The model is currently overloaded	Server error	40	View
Groq	429	Groq 429 — Rate limit exceeded	Rate limit	38	View
OpenAI	400	OpenAI 400 — Context length exceeded	Bad request	34	View
Anthropic	400	Anthropic 400 — You are out of extra usage	Bad request	30	View
Anthropic	529	Anthropic 529 — Overloaded	Server error	26	View
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