How to Fix 429 Too Many Requests - Trial API key rate limit exceeded (Cohere)

Quick Answer: This error occurs when your Cohere trial API key exceeds its strict request rate or token limits per minute. The fastest fix is to upgrade your account to a paid tier or implement exponential backoff retry logic in your application code.

What Causes This Error

• Exceeding the requests-per-minute (RPM) limit imposed on trial API keys.
• Exceeding the tokens-per-minute (TPM) limit due to large prompt sizes or long generation outputs.
• Running concurrent threads or batch scripts that hammer the Cohere API simultaneously.
• Using a single trial API key across multiple different development environments or applications.

Step-by-Step Fixes

Fix 1: Fix 1: Upgrade to a Production (Paid) Plan

Log in to your Cohere Dashboard.,Navigate to the Billing or Settings section.,Enter your payment details and upgrade from the Trial tier to a Production tier to unlock significantly higher rate limits.

Fix 2: Fix 2: Implement Exponential Backoff and Retry Logic

Catch the 429 Too Many Requests exception in your application code.,Wait for a short period (e.g., 2 seconds) before retrying the failed API call.,Double the wait time incrementally with each subsequent failure (exponential backoff) to allow the rate limit window to reset.

Fix 3: Fix 3: Optimize and Reduce Token Usage

Audit your prompts to ensure they are concise and only include necessary context.,Reduce the `max_tokens` parameter in your generation requests to consume fewer tokens per minute.,Batch your inputs efficiently if using endpoints that support multi-item payloads.

Advanced Fixes

Advanced Fix 1: Advanced: Implement Client-Side Rate Limiting and Queuing

Use a token bucket or leaky bucket algorithm in your application layer to strictly control outgoing request rates.,Use an asynchronous task queue (such as Celery or BullMQ) to throttle requests so they never breach Cohere's per-minute thresholds.

FAQs

Q: What are the exact rate limits for a Cohere trial API key?

A: Trial keys typically limit you to 20 calls per minute (CPM) and a limited number of tokens per minute, though exact limits are subject to change per Cohere's current terms of service.

Q: Do trial keys reset automatically after hitting the limit?

A: Yes, trial rate limits reset on a rolling minute-by-minute basis. Once you stop sending requests for 60 seconds, your available quota will begin to recover.