The LG B4 55‑inch tracked at $754 ($13.71/inch) costs less than half the $/inch of the cheapest 2026 55‑inch OLED, Samsung S90H at $1,999.99 ($36.36/inch). For raw value per diagonal inch, the B4 is the clear winner. The S90H adds NQ4 AI Gen3 upscaling and Glare Free coating, but you pay $1,245.99 more for the same screen size.
The Short Answer
For 55‑inch OLEDs, the LG B4 (2024) decisively wins on $/inch: $13.71/inch versus the Samsung S90H’s $36.36/inch. That’s a $1,245.99 total price gap for the same diagonal size. If your priority is maximizing OLED screen area for the least cost, the B4 is the far better value as of May 13, 2026.
Price Per Inch Breakdown
The two TVs sit at opposite ends of the current OLED pricing spectrum.
- LG OLED55B4P (55‑inch): $754 at Amazon → $13.71/inch
- Samsung QN55S90H (55‑inch, 2026): $1,999.99 at Best Buy → $36.36/inch
We also track the cheapest 2026 OLED overall — the Samsung 48‑inch S90H at $1,597.99 from Amazon — which comes to $33.29/inch. Even that smaller 2026 panel is $19.58/inch more expensive than the 55‑inch B4, confirming the B4’s value lead across sizes.
Same Screen Size, Different Generations
Both are 55‑inch 4K OLED televisions, so the diagonal inches match. The difference lies in the model year and the processing package.
- The LG B4 listing confirms “OLED 4K Smart TV” — a 2024 model that delivers OLED’s infinite contrast without modern AI‑based processing or anti‑glare upgrades.
- The S90H listing explicitly names: HDR+, Glare Free coating, NQ4 AI Gen3 Processor, 4K AI Upscaling Pro, AI Motion Enhancer Pro, and Alexa Built‑in.
Because only the S90H includes these features in our live data, a direct specification hierarchy cannot be drawn, but the feature gap is substantial.
What the Extra $1,245.99 Buys
The S90H’s higher price isn’t for a larger screen — it’s for 2026‑specific silicon and reflection handling. The listed upgrades include:
- NQ4 AI Gen3 processor with dedicated AI upscaling and motion enhancement
- Glare Free coating for bright‑room viewing
- HDR+ support (Samsung’s dynamic tone mapping)
- Integrated Alexa voice control
If daylight reflections or AI sharpening matter to you, these are the items you are paying $22.65/inch extra to obtain.
When Each Makes Sense
- Choose the LG B4 55‑inch if you want the lowest $/inch among tracked 55‑inch OLEDs and can live without AI upscaling or anti‑glare treatment. At $754 total, it’s $1,245.99 cheaper than the 2026 Samsung.
- Choose the Samsung S90H 55‑inch if the Glare Free coating, AI processor, and HDR+ are worth $22.65 more per inch — essentially doubling your per‑inch cost.
Are the 2026 AI Features a Must-Have?
For many viewers, the core OLED experience — perfect blacks, vibrant colors, wide viewing angles — is already delivered by the B4. The S90H’s NQ4 AI Gen3 upscaling improves lower-resolution content, and the Glare Free coating helps in sunlit rooms. However, if you watch mostly 4K HDR content in a controlled lighting environment, the B4’s picture quality will satisfy without the premium. The value gap is so large that you could buy a budget soundbar with the savings and still spend less than the S90H.
Verdict
The LG B4 55‑inch is the per‑inch value pick by a wide margin. At $13.71/inch, it handily undercuts the 2026 S90H at $36.36/inch. Unless you specifically need the AI features and anti‑glare coating, the B4 gives you the OLED picture for less than half the $/inch. Prices checked from live listings on May 13, 2026.
Frequently Asked Questions
Is the LG B4 still available new in 2026?
Our live tracking shows the 55‑inch B4 (OLED55B4P) in stock at Amazon for $754. It’s a 2024 model still being sold new, though availability may vary by retailer.
What is the cheapest 2026 OLED TV per inch?
The Samsung 48‑inch S90H at $1,597.99 ($33.29/inch) has the lowest $/inch among the 2026 OLEDs we track. It’s still $19.58/inch more expensive than the 55‑inch B4.
Does the LG B4 support HDR10 or Dolby Vision?
The listing in our database doesn’t specify these features. It’s labeled simply “OLED 4K Smart TV.” If you need confirmation of HDR formats, check the manufacturer’s spec sheet, because our live price feed does not include that detail for this SKU.
Why is the Samsung S90H so much more expensive per inch?
The S90H carries 2026 processing hardware — NQ4 AI Gen3 chip, Glare Free screen, HDR+, and built‑in upscaling — which drive per‑inch cost to $36.36/inch. The 2024 B4 has none of those listed extras, landing at $13.71/inch.