Unexpected 429 rate limit errors when exceeding undocumented (but actually documented) limits without API key or in high-volume use; long latencies reported for experimental models like v4.

No bug; this appears to be a non-issue. Rate limits for Jina Embeddings API are prominently documented with RPM/TPM tables by tier (free/paid/premium) and IP limits, as per official docs. No GitHub issues, SO questions, or community threads found reporting undocumented limits.