Director Johannes Roberts didn’t pull any punches with his new natural horror film Primate, and the movie’s surprisingly strong Rotten Tomatoes score for a January studio horror release comes down to one central element: the animal. Paramount’s bloody, well-reviewed offering centers on a family whose intelligent pet chimpanzee, Ben, is infected with rabies and spirals into a calculated killing machine. That setup sounds straightforward, but Primate flips the familiar animal-attack formula by leaning into intelligence and personality rather than pure feral fury.
What makes Primate stand out among recent horror releases is how Roberts treats Ben not as a mindless beast but as a character with chilling agency. The rabies infection is the catalyst, but Ben’s arc is less about mindless violence and more about a terrifying ascent into cunning malevolence. He taunts victims, manipulates a speech tablet to mock people, and delivers kills with eerie deliberateness. Cinematic choices and the performance of Miguel Torres Umba inside the Ben bodysuit give the chimp an unsettling humanity that elevates the movie beyond typical killer-ape fare.
The film is most effective when it embraces B-movie slasher energy while maintaining a veneer of emotional realism. Tropes the genre expects—reckless young adults, poor decisions, and escalating body count—are used deliberately here, creating a satisfying blend of camp and cruelty. Roberts gives Ben a signature method of murder, akin to a slasher’s trademark weapon, which makes the ape feel like a bona fide horror icon in the vein of Jason Voorhees or Michael Myers. The repeated jaw-tearing kills are gruesome, memorable set pieces that anchor the film’s tone.
Visually and emotionally, Primate works because it balances visceral horror with character-driven stakes. Chimpanzees have expressive faces, and that natural expressiveness helps sell Ben’s shift from pet to predator. Scenes where Ben toys with victims or pretends to use a ripped-off jaw as a macabre prop underline how personal the violence feels. Instead of anonymous carnage, Roberts crafts a predator who is almost theatrical—smart, mocking, and terrifyingly intentional.
For viewers who love natural horror, slasher cinema, or B-movie thrills, Primate delivers a fresh spin on animal attack stories. It’s a January horror win that uses a believable emotional core and an unnerving central creature to overcome the seasonal stigma of low expectations. Whether you’re drawn by the premise of a rabid chimpanzee, intrigued by Roberts’ knack for tight, suspenseful set pieces, or just in the mood for a grisly, fun horror ride, Primate earns its place in the winter horror landscape.
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