To give you an idea of the savings: I connected Fable after Opus, which had already accumulated 76k context, but the context shrank to 34k, and after 10 minutes of bug investigation, it only rose to 56k. Without Pxpipe, it would have been 120-180k tokens.
That context drop is useful evidence, but I’d separate prompt-window compression from complete-task savings. The 76k → 34k snapshot does not include later retries, cache pricing, tool calls, or whether the run still solves the same bug. A convincing integration benchmark would repeat the same issue with and without Pxpipe and report success, total billed usage, elapsed time, and run-to-run variance.
Evidence is in the original repo. Furthermore, this method allowed me to use Fable with same or slower quota usage than with Opus 4.8. The very fact that the context doesn’t fly beyond the 250k tokens upon task completion, which often happens to me on Opus 4.8, speaks for itself.
I didn’t notice any poor performance. Furthermore, Fable itself understands what Pxpipe is doing and, when necessary, starts requesting data so that it arrives as text.
Besides, if you have at least Claude Code Pro, you still have time to test it yourself.
