# Darwin-27B-ZTC vs Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free)

As of Oct 15, 2026, Darwin-27B-ZTC leads Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free) in 1 of 1 shared categories: Decision models.

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

Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free): price per 1M tokens is unset in the catalog.

Darwin-27B-ZTC: open weights.

Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free): closed weights.

- Which to pick, Decision models: As of Oct 15, 2026, Darwin-27B-ZTC leads Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free) in Decision models at #6 against #31.

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, Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free) is ranked #31 in Decision models (since Oct 15, 2026; sources JevBench; methodology v1.0).