Tests made in july 2026 with Sonnet 5 Caveman Advertised saving: 65%. Measured saving: 8.5%. https://blog.jetbrains.com/ai/2026/07/speak-to-ai-agents-like-cavemen-tosave-tokens/ RTK rtk advertised saving: 60–90%. Measured on real agent work: +7.6% more expensive at low reasoning effort (p=0.004), ±0% at high effort https://blog.jetbrains.com/ai/2026/07/rtk-claude-code-token-savings/ submitted by /u/CharlesPasquaIsBack
Originally posted by u/CharlesPasquaIsBack on r/ClaudeCode
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