Context Window Exceeded

Category: infrastructure

An operational runtime error that occurs when the combined token volume of system instructions, history, and tool outputs passes the model's absolute memory ceiling.

Every model architecture has a fixed token constraint (e.g., 32k or 128k tokens). When a recursive multi-agent loop or an bloated RAG injection passes this hard boundary, the runtime pipeline crashes or drops the oldest data out of memory. Resolving this requires strict token counters and aggressive context truncation filters prior to calling inference endpoints.

Common Examples

• The automated simulation crashed with a context window exceeded exception after an agent mistakenly injected a raw five-megabyte log file into its chat tool.
• We built an upstream middleware token-counter to catch and prune bloated prompts before they can trigger a costly context window exceeded failure at the API layer.