# Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free) vs Sieve 31B

As of Oct 14, 2026, Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free) leads Sieve 31B in 0 of 1 shared categories.

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.

Sieve 31B: 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): closed weights.

Sieve 31B: open weights.

- Which to pick, Decision models: As of Oct 14, 2026, Sieve 31B leads Mercury Decide (Inception; System One decisions API, served free on OpenRouter as inception/mercury-decide:free) in Decision models at #3 against #31.

As of Oct 14, 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 14, 2026; sources JevBench; methodology v1.0).

As of Oct 14, 2026, Sieve 31B is near state of the art, rank #3 in Decision models (since Oct 14, 2026; sources Decision Index Full; methodology v1.0).