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#caching

4 articles

Scatter chart on a dark background: two lines of five points each, one for GPT-6 Sol and one for Claude Opus 5.5, plotting Artificial Analysis Intelligence Index score against cost per task on a log scale from low to max effort. Sol runs from 34 points at $0.13 to 47.5 at $1.06; Opus 5.5 runs from 42 points at $0.55 to 57.6 at $5.98. The two lines overlap only between about 42 and 47.5 points.

GPT-6 Sol vs Claude Opus 5.5 cost per task: Sol costs 28% to 79% as much for the same target score

Leo Kaka
Two identical grey machines on a workbench, each hung with a blank price tag; the brass utility meters beneath them read very differently, and a single yellow line feeds only the higher one.

GPT-6 Astra vs Claude Fable 5.1: same $10/$50, and a 39% cheaper agent bill

Leo Kaka
Hand-drawn ink illustration: a brass balance scale on a workbench. One pan holds a single plain block, the other a tall stack of many identical thin sheets; the beam is very nearly level. A small yellow brass weight lies on the bench beside the scale, off both pans, with a hand reaching toward it.

Is Claude Fable 5.1 cheaper than Opus 5? Only when cache reads are a third of your bill

Leo Kaka
The source post-mortem's cover art: server racks trading cables in the dark (The Daily Brief)

Routers aren't dead — per-request routing is

Linden Kern