Apple MacBook Air 15 (M5) 24GB (2026) vs Lenovo Gen 12 ThinkPad X1 21KC0046US

Benchmark-weighted head-to-head · data updated 2026-09-10

Winner: Apple MacBook Air 15 (M5) 24GB (2026)

Apple MacBook Air 15 (M5) 24GB (2026) takes 8.8 weighted points vs 4.5, winning on CPU Benchmark, Pixel Density, Thickness. The winner also sits in a more competitive value tier — a clear-cut call.

Winner
Highly Rated

Apple MacBook Air 15 (M5) 24GB (2026)

Apple M5 (10 Core) · Integrated (Apple iGPU)

Under $1500
4.8 (748)
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VS

Lenovo Gen 12 ThinkPad X1 21KC0046US

Intel Core Ultra 7 155U · Integrated (Intel iGPU)

Under $1900
4.9 (13)
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Use-Case Scores

CategoryMacBook Air 15 (M5) 24GB (2026)Gen 12 ThinkPad X1 21KC0046US
Gaming3.3/103/10
Productivity6.2/105.8/10
Programming5.8/105.5/10
Engineering / 3D4.4/104.1/10
Student6.3/106/10
Travel / Portability7.4/107.2/10
AI Workloads4.1/104/10
Value for Money5.7/104.6/10

Detailed Specification Comparison

SpecMacBook Air 15 (M5) 24GB (2026)Gen 12 ThinkPad X1 21KC0046US
CPUApple M5 (10 Core)Intel Core Ultra 7 155U
PassMark Score27,32216,355
CPU Cores4P+6E2P+10E
GPUIntegrated (Apple iGPU)Integrated (Intel iGPU)
G3DMark Score——
RAM24 GB DDR532 GB DDR5
RAM UpgradeableNo (soldered)No (soldered)
Storage1 TBSSD1 TBSSD
Display15.3″ Liquid Retina14″ IPS
Resolution2880x18641920x1200
Refresh Rate60 Hz60 Hz
Pixel Density224 PPI162 PPI
TouchscreenNoYes
Weight3.32 lbs2.4 lbs
Thickness0.45″0.59″
Amazon Rating4.8 ★ (748)4.9 ★ (13)
Value Score5.7/104.6/10

CPU Comparison

The Apple MacBook Air 15 (M5) 24GB (2026)'s Apple M5 (10 Core) is ~67% faster in multi-threaded PassMark (27,322 vs 16,355). A generational gap you will feel in exports, compiles and heavy multitasking.

GPU & Gaming

Neither carries a dedicated GPU — both fine for esports at low settings, neither for modern AAA gaming.

Productivity & Battery

Office scores: 6.2/10 vs 5.8/10. Battery isn't in our dataset, but both share a similar power class, so expect comparable endurance.

Display

MacBook Air 15 (M5) 24GB (2026): 15.3″ Liquid Retina 2880x1864 @ 60 Hz. Gen 12 ThinkPad X1 21KC0046US: 14″ IPS 1920x1200 @ 60 Hz. Panel quality is effectively even.

RAM, Storage & Upgradeability

MacBook Air 15 (M5) 24GB (2026): 24 GB DDR5 (soldered) + 1 TBSSD. Gen 12 ThinkPad X1 21KC0046US: 32 GB DDR5 (soldered) + 1 TBSSD.

Build & Portability

3.32 lbs / 0.45″ vs 2.4 lbs / 0.59″. The Lenovo Gen 12 ThinkPad X1 21KC0046US is 0.9 lbs lighter — significant for daily carry. Travel scores: 7.4 vs 7.2.

Value

Value scores land 5.7/10 vs 4.6/10. The Apple MacBook Air 15 (M5) 24GB (2026) extracts more performance per dollar.

Final Verdict

Buy the Apple MacBook Air 15 (M5) 24GB (2026) — it wins the weighted spec battle and costs less. Choose the Lenovo Gen 12 ThinkPad X1 21KC0046US only if its specific strengths matter more to you.

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Also Consider

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