BTW also saves 10k - 20k tokens per fresh context depending on config

Cooked for 1s · done 11:01 AM Opus 5.5 14k ctx ~0.088%/call 5h 2.0%

blank: custom Opus 5.5 4k ctx ~0.085%/call 5h 2.0%

blank: blank Opus 5.5 1k ctx ~0.084%/call 5h 2.0%