In LG’s 2025 OLED lineup, the LG B5 stands as the most affordable way to experience true OLED picture quality, positioned just below the LG C5 and LG G5. Likewise, in 2024, its predecessor — the LG B4 — occupied a similar spot beneath the LG C4, appealing to those who wanted OLED performance without the flagship price.
Both the B4 and B5 share many of the same essentials — perfect blacks, vivid colors, and smooth 120 Hz playback — but the B5 brings a few refinements under the hood. In this article, we’ll highlight their differences, and answer whether the B5 offers meaningful improvements over the B4.
LG B5 (2025) Short Overview
The LG B5 is the 2025 evolution of LG’s entry-level OLED. It’s powered by the α8 AI Processor Gen2, delivering smarter picture optimization, cleaner upscaling, and more accurate tone mapping. This new chip refines contrast handling and highlights detail in HDR scenes, helping the B5 punch above its tier.
Picture quality remains superb thanks to OLED’s self-lit pixels, offering infinite contrast and perfect black levels. The native 120 Hz panel keeps motion smooth, and HDR support covers Dolby Vision, HDR10, and HLG. Combined with AI Picture Pro and Dynamic Tone Mapping Pro, the B5 achieves a balanced brightness curve for both dark-room movies and daylight streaming.
Gamers will find the B5 highly capable, with all four HDMI 2.1 ports supporting 4K @ 120 Hz, VRR, ALLM, G-SYNC, and FreeSync for smooth, responsive gameplay. The updated webOS 25 interface feels more responsive and intuitive, while Wi-Fi 6E provides stronger wireless stability for 4K streaming and cloud gaming. A subtle design refresh with a slimmer bezel and centered stand completes its clean, modern look.
| LG B5 Prices | |
| 83-inch (OLED83B5PUA) | Check Today’s Price (Amazon.com)… |
| 77-inch (OLED77B5PUA) | Check Today’s Price (BestBuy.com)… |
| 65-inch (OLED65B5PUA) | Check Today’s Price (Amazon.com)… |
| 55-inch (OLED55B5PUA) | Check Today’s Price (Amazon.com)… |
| 48-inch (OLED48B5PUA) | Check Today’s Price (BestBuy.com)… |
LG B4 (2024) Short Overview
The LG B4 was LG’s 2024 entry-level OLED and a popular pick for those wanting premium display quality at a moderate price. It ran on the α8 AI Processor 4K (Gen1) — already impressive, but not as refined as the Gen2 chip now in the B5. The B4 produced excellent contrast, rich colors, and accurate tone mapping, making it a strong performer for movies, sports, and gaming.
Its 120 Hz OLED panel ensured smooth motion, with HDR support for Dolby Vision, HDR10, and HLG, and audio powered by Dolby Atmos and AI Sound. The inclusion of four HDMI 2.1 ports made it fully ready for next-generation consoles, offering VRR, ALLM, and G-SYNC Compatibility.
Running on webOS 24, it provided a solid and familiar smart-TV experience, though it lacked the newer AI-driven content recommendations found in webOS 25. Its design used a slightly wider stand compared to the B5, but overall retained the sleek OLED aesthetic. For its year, the B4 was a well-balanced entry point into LG’s OLED ecosystem.
| LG B4 Prices | |
| 83-Inch (OLED83B4PUA) | Check Today’s Price (Walmart.com)… |
| 77-Inch (OLED77B4PUA) | Check Today’s Price (Amazon.com)… |
| 65-Inch (OLED65B4PUA) | Check Today’s Price (Amazon.com)… |
| 55-Inch (OLED55B4PUA) | Check Today’s Price (Amazon.com)… |
| 48-Inch (OLED48B4PUA) | Check Today’s Price (Walmart.com)… |
LG B5 and B4 Specs Comparison Table
Before discussing the real-world differences, let’s first take a look at how both models compare on paper.
| Feature | LG B5 (2025) | LG B4 (2024) | ||||||||||
| Display Type | OLED 4K (3840 × 2160), 120 Hz | OLED 4K (3840 × 2160), 120 Hz | ||||||||||
| Sizes Available | 48″, 55″, 65″, 77″, 83″ | 48″, 55″, 65″, 77″, 83″ | ||||||||||
| Design | Slim Bezel / Central Stand | Slim Bezel / Wide Stand | ||||||||||
| Processor | α8 AI Processor Gen2 | α8 AI Processor Gen1 | ||||||||||
| HDR Support | Dolby Vision, HDR10, HLG | Dolby Vision, HDR10, HLG | ||||||||||
| Smart Platform | webOS 25 | webOS 24 | ||||||||||
| HDMI Ports | 4 × HDMI 2.1 (48 Gbps) | 4 × HDMI 2.1 (48 Gbps) | ||||||||||
| Gaming Features | 4K @ 120 Hz, VRR, ALLM, G-SYNC, FreeSync | 4K @ 120 Hz, VRR, ALLM, G-SYNC, FreeSync | ||||||||||
| Wi-Fi Support | Wi-Fi 6E (6 GHz band) | Wi-Fi 5 (5 GHz band) | ||||||||||
| Brightness Performance | Slightly higher HDR peak (~799 nits) | Standard HDR peak (~647 nits) | ||||||||||
| Audio Features | Dolby Atmos, AI Sound Pro | Dolby Atmos, AI Sound | ||||||||||
| Prices | Generally Similar | Generally Similar | ||||||||||
|
|
The Differences Between LG B5 and B4
On paper, the two TVs appear similar — but when you look closer, several key differences make the B5 a more refined and capable OLED overall.
- Processor Upgrade – α8 Gen2 vs α8 Gen1
The LG B5 introduces the newer α8 AI Processor Gen2, bringing better upscaling, tone mapping, and AI picture accuracy. - Updated Smart Platform – webOS 25
The latest webOS 25 improves interface responsiveness, adds smarter AI recommendations, and offers extended software support. - Wi-Fi 6E Support
The B5 includes Wi-Fi 6E for faster, more reliable wireless streaming and lower latency. - Improved HDR Brightness
Testing shows a modest boost in HDR peak brightness on the B5, improving detail in highlights. - Refined Design
The B5’s slimmer bezels and centered stand give it a cleaner, more modern profile.
Is There Any Improvement in LG B5?
Yes — the LG B5 clearly refines the B4’s formula. With its upgraded processor, faster Wi-Fi 6E connection, improved HDR brightness, and smoother webOS 25 interface, it feels more polished and future-ready. And since their prices are now generally similar, the LG B5 becomes an even more interesting choice — offering tangible upgrades without paying extra. It’s the smarter pick for buyers who want a dependable OLED with strong gaming and streaming performance in 2025.
| LG B5 Prices | |
| 83-inch (OLED83B5PUA) | Check Today’s Price (Amazon.com)… |
| 77-inch (OLED77B5PUA) | Check Today’s Price (BestBuy.com)… |
| 65-inch (OLED65B5PUA) | Check Today’s Price (Amazon.com)… |
| 55-inch (OLED55B5PUA) | Check Today’s Price (Amazon.com)… |
| 48-inch (OLED48B5PUA) | Check Today’s Price (BestBuy.com)… |
However, if you happen to find the LG B4 offered at a special discount or clearance sale, it’s still a capable OLED that delivers excellent picture quality and gaming performance. But if the price of the LG B4 is nearly similar, then the LG B5 should be the one to choose — thanks to its newer processor, updated software, and improved connectivity that make it the more future-ready option for 2025.
| LG B4 Prices | |
| 83-Inch (OLED83B4PUA) | Check Today’s Price (Walmart.com)… |
| 77-Inch (OLED77B4PUA) | Check Today’s Price (Amazon.com)… |
| 65-Inch (OLED65B4PUA) | Check Today’s Price (Amazon.com)… |
| 55-Inch (OLED55B4PUA) | Check Today’s Price (Amazon.com)… |
| 48-Inch (OLED48B4PUA) | Check Today’s Price (Walmart.com)… |