The short version
- SBMM means skill-based matchmaking. The game keeps a hidden skill rating for you and tries to place you with players near your level.
- In Call of Duty, Activision says connection quality and search time come first. Skill is one factor among several.
- Activision's own tests found that loosening SBMM made more players quit matches, while tightening it hurt top players.
- Modern Warfare 4 kept classic matchmaking at launch after its beta tried open, low-SBMM playlists, and the backlash is back.
How skill-based matchmaking works
Most online shooters keep a skill number for you behind the scenes. Think of it like a chess rating that you can't see. It goes up when you play well and down when you don't, and it's built from things like kills, deaths, score per minute and wins.
When you press "find match", the matchmaker does three jobs at once:
- Finds a server close to you, so your ping stays low.
- Fills the lobby quickly, so you aren't waiting.
- Balances the lobby, so neither team gets stomped and you're not wildly out of your depth.
Those three goals pull against each other. A perfectly balanced lobby might mean a server farther away or a longer wait. A fast, low-ping lobby might mean a wider spread of skill. Every matchmaking system is a set of choices about which goal gives way first.
That's also what separates SBMM from ranked mode. In ranked, your rating is visible and climbing it is the point. SBMM runs quietly in casual playlists, which is why it annoys people: you can't see it, and you didn't opt in.
The trade-off in one table
Image: Zerocade
What Activision's research says
In 2024 Activision published a series of matchmaking white papers, the most detail any big publisher has shared on the subject. The key points:
- Skill has been part of Call of Duty matchmaking since Call of Duty 4 (2007).
- Connection and search time are the two biggest factors. Activision said skill is "not the driving force".
- In a Modern Warfare III test that loosened skill matching, players were much more likely to quit matches early, and blowouts went up at every skill level. Lower- and mid-skill players left in greater numbers.
- A test that tightened skill matching cut quit rates, but high-skill players were unhappy, so it wasn't rolled out.
Activision also said it considered a playlist with no skill matching at all, but expected weaker players to avoid it, which would leave it full of strong players anyway.
Call of Duty's back-and-forth
Image: Zerocade
In 2025, Black Ops 7 added open playlists that drastically reduced skill matching, a first for the series. Modern Warfare 4's beta in August 2026 had open playlists too. But MW4 launched with classic matchmaking, and the reaction since has been loud. One widely shared player post called SBMM in MW4 "the most miserable experience to date".
Infinity Ward's multiplayer creative director Joe Cecot told IGN that the team's "end goal is that every match is a good match". On paper, that's the same balancing act described above: the argument is about what a "good match" means to a casual player versus a top-1% one.
So is SBMM bad?
It depends on where you sit. If you're an average player, SBMM is mostly what stops you getting farmed by a streamer every other match, and Activision's data suggests those players are the first to leave without it. If you're very good, it means every lobby is a fight, because you're good enough to be matched with other very good players.
What actually helps, whatever your skill:
- Play wired. Activision says connection matters most, and a cable cuts both ping and packet loss.
- Pick the right region if the game lets you, so you land on the nearest servers.
- Try open playlists when a CoD game offers them. That's the closest thing to the old-school lobbies people miss.
The fight over SBMM won't end with MW4. Watch whether Activision brings back the beta's open playlists in a season update.
