openaienmodel: gpt-5-mini-2025-08-07
Workflows, Workers - Increased concurrency, creation rate, and queued instance limits for Workflows instances
Key Points
- Concurrency increased to 50,000
- Creation rate up to 300/sec per account
- Queued instances per workflow increased to 2,000,000
Summary
Cloudflare updated Workflows instance limits (published 2026-04-15). The changes increase parallel concurrency, instance creation rates, and per-workflow queued instance capacity for users on the Workers Paid plan.
Key Points
- Concurrent instances (running in parallel): previously 10,000 → now 50,000.
- Instance creation rate: previously 100/sec per account → now 300/sec per account, and 100/sec per workflow.
- Queued instances per workflow: previously 1 → now 2,000,000.
- These increases apply to all users on the Workers Paid plan.
- "Queued instances" = instances that have been created or awoken and are waiting for a concurrency slot.
- Action for engineers: review autoscaling, throttling, alerting, and cost impacts; update any rate-limit or retry logic accordingly and consult the Workflows limits documentation for details.