The open System One roundup

The post ranks them but never benchmarks them. Decider-2B, built on Qwen3.5-2B at roughly 1.9B parameters under Apache 2.0, is called the closest match; Laya 421M and Reflex are recommended for Apple silicon, NanoJev 0.6B for its decision head, and System-One 4B for probability calibration. No accuracy or latency figures for any.

Nobody in the thread answers that. A reply asks it directly - whether the scores can be used as thresholds or only compared against each other - and gets no answer. Since calibration is the whole premise of the approach, check each project's own calibration eval before wiring a threshold into anything.

Not yet. The author says the next step is picking two to run locally and measure the gap against Jev, and the thread has no latency numbers - a reply asks how long Laya takes per call on a Mac, which also goes unanswered. Treat the roundup as a starting shortlist.

Already moving. A later reply adds WaterSheep, with Apache 2.0 weights, a local /v1/systemone endpoint usable from the official TypeSafe Python SDK, and multi-label question support. Expect more to appear, and verify each project's own license, weights and endpoints rather than trusting this summary.

The account 小墨同学, posting as @xiaomovps, who describes himself as a Pi Network enthusiast and co-founder of AI Spark and writes in Chinese. The roundup is a community survey of launch-week clones rather than an evaluation, so its recommendations reflect one builder's reading instead of measurement.

Because the clones appeared almost immediately. He opens by saying the open-source community was already frantically reproducing Jev within days of release, and frames the five as the most worth recommending. The follow-up came the same day, September 18, 2026, so nothing listed had time to be tested.

WaterSheep, posted by Samrat Dutta with Apache 2.0 weights. He says it serves a local /v1/systemone endpoint that the official TypeSafe Python SDK can call directly, and that it supports multi-label questions. It is a sixth option that surfaced after the roundup was written.