Every DeepSeek error we see across thousands of AI agents routing through the gateway. 1 common errors, 48 affected teams in the last 30 days. Each one with what it means, how to fix it, and how the gateway routes around it.

DeepSeek's reasoning models add fields other APIs don't have — dropping reasoning_content on follow-up turns is a common 400 — and capacity is tighter than the big labs at peak, which surfaces as 5xx. Keep the reasoning fields in your transcript and plan a fallback for busy windows.