MacroMind matchup data: real ranked games, not opinions
Jax vs Cassiopeia
How often does Jax beat Cassiopeia in Top?
Jax into Cassiopeia in Top: 46% observed win rate across 179 ranked games.
Global ranked sample: games from every region and every rank pooled together, not one server's stats. Data runs through patch 26.12; curves updated 2026-08-07.
By 15 minutes the median game has Jax behind by 860 gold.
Jax at 15:00
- Gold: -860
- CS: -28
- XP: -1,047
Typical gap to Cassiopeia, from 178 games that reached 15:00.
Does Jax counter Cassiopeia?
No counter here: Jax sits at 46% over 179 games. The swing lives in the spots below, so play the side you know better and chase the row that moves the number the most in this lane, then hold that lead through the first back.
Beating Cassiopeia: the Jax game plan
A gold lead at 10:00 puts Jax at 52% across 52 games. Flip the lead and Jax falls to 43% across 127.
| The spot | Win rate | Games |
|---|---|---|
| Ahead in gold at 10:00 | 52% | 52 |
| Behind in gold at 10:00 | 43% | 127 |
| First blood | 48% | 69 |
| +kills at 10:00 | 48% | 48 |
Someone usually dies here around 4:04 in the median game, and level 6 lands near 5:57. Until your spike is online, respect the all-in.
Jax's Top build, with receipts
Into Cassiopeia specifically, Jax finishes Trinity Force first most often: 52.9% over 51 games of this matchup.
The most-finished Jax core is Trinity Force, Sundered Sky, Zhonya's Hourglass: 58.8% across 4,416 games when all three got done. All matchups, patches 26.1-26.12.
Most games start Doran's Blade + Health Potion; the first finished item is usually Trinity Force (24,557 games).
Skill plan: Jax players max W first and take E at level 1.