# Darwin-27B-ZTC vs Sieve 31B

As of Oct 15, 2026, Darwin-27B-ZTC leads Sieve 31B in 0 of 1 shared categories.

Darwin-27B-ZTC: price per 1M tokens is unset in the catalog.

Sieve 31B: price per 1M tokens is unset in the catalog.

Darwin-27B-ZTC: open weights.

Sieve 31B: open weights.

- Which to pick, Decision models: As of Oct 15, 2026, Sieve 31B leads Darwin-27B-ZTC in Decision models at #3 against #6.

As of Oct 15, 2026, Darwin-27B-ZTC is near state of the art, rank #6 in Decision models (since Oct 15, 2026; sources Decision Index Full; methodology v1.0).

As of Oct 15, 2026, Sieve 31B is near state of the art, rank #3 in Decision models (since Oct 15, 2026; sources Decision Index Full; methodology v1.0).