1.6% Direct API Call Ratio
- Entity ID:
ent-20260419-ddfa7ea71f0c - Type:
concept - Scope:
shared - Status:
active - Aliases: Raschka 1.6% framing, harness-to-model ratio
Description
Sebastian Raschka's quantification, derived from the leaked source, that only 1.6% of the Claude Code codebase directly invokes the Anthropic model API while the other 98.4% is harness engineering (orchestration, compaction, tool plumbing, permission pipeline, caching, memory, telemetry). Became the most-cited single statistic from the leak in technical discussions because it quantifies precisely what competitors gained access to — the non-model IP.
Key claims
- The leak shortened time-to-copy from unknowable to 'read and ship'
- Only 1.6% of Claude Code directly calls the model API
- Only ~1.6% of Claude Code is AI decision logic; ~98.4% is deterministic infrastructure
- 98.4% of Claude Code is deterministic infrastructure; 1.6% is AI decision logic
Relations
- Sebastian Raschka --[owns]--> 1.6% Direct API Call Ratio