Verdict: DJI Osmo Action 5 Pro wins on sensor size and battery life; GoPro HERO 13 wins on ecosystem and waterproofing.
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Winner: DJI Osmo Action 5 Pro
Spec-by-spec comparison
GoPro HERO 13 Black
DJI Osmo Action 5 Pro
Sensor Size
1/2.3-inch
1/1.3-inch
4K Max
4K/120p
4K/120p
Battery (4K/60p)
~70 min
~2.5 hours
Waterproof (no case)
20m
20m
Stabilization
HyperSmooth 6.0
RockSteady 4.0
Front Screen
Small info display
Color touchscreen
GoPro HERO 13 Black
What works
HyperSmooth 6.0 — class-leading stabilization for quick-direction-change activities
20m waterproofing without a case (industry best)
Swappable lens mods for wide, standard, and macro shooting
What doesn't
1/2.3-inch sensor shows its size limit in low-light scenarios
~70-minute battery at 4K/60p requires constant swapping
GoPro subscription needed for cloud backup and some editing features
DJI Osmo Action 5 Pro
What works
1/1.3-inch sensor — dramatically better low-light than HERO 13
4.5-hour battery — 3× longer than HERO 13 at comparable settings
Front-facing color screen — better for vlogging face-to-camera
What doesn't
Not officially waterproof beyond 20m without additional case
DJI accessory ecosystem smaller than GoPro's mature system
Slightly larger form factor than HERO 13
Bottom line
Our pick: DJI Osmo Action 5 Pro. It edges out the alternative on 1/1.3-inch sensor — dramatically better low-light than hero 13. That said, GoPro HERO 13 Black still wins on hypersmooth 6.0 — class-leading stabilization for quick-direction-change activities — consider it if that single trade matters most for your use.