MacBook Air M3 vs M4: Is the Upgrade Worth It?

The MacBook Air M4 is the better buy if you are shopping new: it has a lower $999 starting price, double the base RAM (16 GB vs 8 GB), a faster 10-core CPU, and a 12MP Center Stage webcam. If you are open to refurbished, the picture changed in 2026. A refurbished M4 with 16 GB of RAM now starts around $826 on RefurbMe, essentially the same price as a refurbished 16 GB M3 at $829, which makes the M4 the smarter refurbished pick at that configuration. The M3 still wins on outright price: an 8 GB model starts around $749, the cheapest route into Apple Silicon. The right answer comes down to how much RAM you need and how much Apple Intelligence matters to your workflow.

According to RefurbMe's tracking, a new MacBook Air first reaches the refurbished market a median of 99 days after Apple's release, and the median Refurb Discount across every MacBook Air model RefurbMe has tracked is 87% (as of July 2026). Those figures come from the RefurbMe Refurbished Apple Price Index (RAPI). The 87% is a family-wide median that includes much older models, so it does not mean a current M3 or M4 sells for 87% off. What it does show is how fast and how far MacBook Air prices fall once units enter the refurbished channel, which is exactly why an M3 or M4 is worth comparing against a new machine today.

Quick Comparison: MacBook Air M3 vs M4

Here are the key differences at a glance.

Sources: MacBook Air (13-inch, M3, 2024) Tech Specs, MacBook Air (13-inch, M4, 2025) Tech Specs. Refurbished floors verified live on RefurbMe, July 2026.

Performance: How Much Faster Is the M4?

The M4 chip delivers a meaningful step up over the M3. On the Geekbench 6 Mac benchmarks, the M4 Air posts roughly 3,700 single-core and about 14,800 multi-core, compared with roughly 3,150 single-core and about 12,000 multi-core for the M3. That works out to around 15 to 20 percent faster single-core performance and around 20 to 25 percent faster multi-core performance.

In everyday tasks, that gap is rarely felt. Both chips handle web browsing, office work, photo editing, and video streaming without hesitation. The difference becomes noticeable in longer video exports, running machine learning models locally, and sustained workloads that push the chip for minutes at a time.

One caveat applies to both models: neither has a fan. Under sustained heavy load, thermal throttling narrows the performance gap between the two chips. For short bursts of demanding work, the M4 is clearly faster. For prolonged rendering sessions, the gap shrinks considerably. The M4 also ships with 120 GB/s memory bandwidth versus 100 GB/s on the M3, a 20 percent improvement that benefits GPU-heavy tasks and large data operations.

Apple Intelligence: The RAM Factor

This is the section that decides the M3 versus M4 question for a lot of buyers, and it matters more than any benchmark number.

Both the MacBook Air M3 and M4 support Apple Intelligence, Apple's on-device AI system introduced with macOS Sequoia and expanded in later releases. But the base configurations tell very different stories.

The base M3 Air ships with 8 GB of unified memory. The base M4 Air ships with 16 GB. Apple Intelligence features run their models directly in RAM alongside your open apps. On an 8 GB Mac, users report memory pressure warnings appearing during normal multitasking once AI features are active. The experience degrades in ways that are noticeable: slower Writing Tools responses, lag when switching apps, and more frequent page-outs to storage.

The M4's Neural Engine also runs Apple Intelligence tasks far faster. The M3's Neural Engine delivers 18 TOPS (trillion operations per second). The M4's Neural Engine delivers 38 TOPS, more than double the M3, which translates to quicker Writing Tools responses, faster image generation in Image Playground, and snappier Siri interactions.

The stakes rose at WWDC in June 2026. Apple previewed the next generation of Apple Intelligence and a rebuilt Siri AI, shipping this fall in macOS 27, named macOS Golden Gate. Its most demanding new features, including the more expressive Siri voices and the big systemwide dictation accuracy gain, require 12 GB of unified memory. That leaves 8 GB Macs, such as the base M3 Air, outside the cutoff, while the 16 GB M3 and every M4 configuration clear it.

If Apple Intelligence is central to why you want a Mac, 16 GB is the minimum you should consider, which points you to the M4's base configuration or a 16 GB M3. A refurbished M3 at 16 GB starts around $829, and a refurbished M4 at 16 GB starts around $826, so for this specific configuration the newer chip no longer costs more. That single fact reshapes the recommendation below.

Design, Display, and Build Quality

Here is where the two laptops converge almost completely. The M3 and M4 MacBook Air share an identical chassis. Both weigh 2.7 pounds (13-inch) and 3.3 pounds (15-inch), with the same dimensions and the same aluminum construction. You cannot tell them apart by looking or holding them.

The display is also the same: a Liquid Retina panel at 13.6 inches or 15.3 inches, 60Hz, 500 nits peak brightness, P3 wide color, True Tone. Neither model offers ProMotion or a higher refresh rate. For buyers weighing the Air against the Pro lines, the display difference is covered in the MacBook Air M4 vs MacBook Pro M4 comparison.

Three practical differences stand out between the M3 and M4.

First, the camera. The M3 Air has a 1080p FaceTime HD webcam. The M4 Air upgrades to a 12MP camera with Center Stage, which automatically keeps you framed as you move around during calls. For anyone on frequent video calls for work, this is a genuine daily improvement.

Second, Thunderbolt. The M3 Air has Thunderbolt 3 ports. The M4 Air has Thunderbolt 4. In practice, both support 40Gb/s transfer speeds, but Thunderbolt 4 offers better compatibility with newer docks, external storage, and peripherals.

Third, external display support. The M3 Air can drive two external monitors, but only when the laptop lid is closed. The M4 Air drives two external monitors with the lid open or closed, a meaningful difference for anyone running a two-monitor desktop setup.

Refurbished Pricing: How the Numbers Line Up in 2026

This is the most important section for a large share of buyers, and the pricing shifted enough in 2026 to change the recommendation.

Apple's M5 MacBook Air launched in March 2026, pushing both the M3 and M4 models deeper into the refurbished market. The supply of lightly used M3 and M4 Airs has grown as owners upgrade, and that has pulled refurbished M4 prices down to within a few dollars of the M3.

Here is what you can find today on RefurbMe, verified live in July 2026 and ordered with the highest-value seller first:

The cheapest refurbished M3 sits at $749, roughly $250 below the new M4's $999 starting price. The bigger story is at 16 GB: a refurbished 16 GB M4 now starts around $826, just under the $829 you would pay for a 16 GB M3 and well below a new M4. For a 16 GB machine, that basically removes the price reason to choose the older chip.

Apple Certified Refurbished remains the trust option here, with a one-year warranty, a new battery, and a new outer shell, though it typically prices above the Back Market and eBay Refurbished listings above. If you want the cheapest way into Apple Silicon and do not lean on Apple Intelligence, the 8 GB M3 around $749 is still the value play. If you want 16 GB, the refurbished M4 is now the smarter buy. Compare all current refurbished MacBook Air prices on RefurbMe to see the full picture across sellers.

MacBook Air 11.6"

128GB SSD
1.3Ghz Intel Dual-Core i5 4th gen
4GB memory • Silver
2013 release

Good condition, by eBay

$89

new $999 -91%

View deal

MacBook Air 11.6"

64GB SSD
1.7Ghz Intel Dual-Core i5 3rd gen
4GB memory • Silver
2012 release

Good condition, by eBay

$103

new $999 -90%

View deal

MacBook Air 13.3"

256GB SSD
1.3Ghz Intel Dual-Core i5 4th gen
8GB memory • Silver
2013 release

Good condition, by eBay

$104

new $1,399 -93%

View deal

Compare all Refurbished MacBook Air

Future-Proofing: How Long Will Each Last?

Based on Apple's historical support patterns, the M3 Air (released in 2024) should receive major macOS updates through approximately 2031 to 2032. The M4 Air (released in 2025) extends that window by roughly one year, to approximately 2032 to 2033. Both are confirmed for macOS 27 Golden Gate, which drops every Intel Mac but supports all Apple silicon models.

The more consequential future-proofing question is RAM. Software requirements grow over time. The 16 GB base on the M4 gives it a meaningful advantage in the second half of its support lifecycle, and now that a refurbished 16 GB M4 costs about the same as a refurbished 16 GB M3, that headroom comes at no premium. An 8 GB M3 Air bought today may feel adequate in 2026 but constrained by 2029 as browsers, AI tools, and operating system footprints expand. For a detailed look at how long these machines last in practice, see the guide on how long MacBooks last.

The M4's Neural Engine advantage also matters for AI-driven software that has not yet shipped. Apple and third-party developers are building features that leverage the Neural Engine directly. A 38 TOPS engine handles those tasks more gracefully than an 18 TOPS engine, extending the M4's capable lifespan in that area.

Who Should Buy the MacBook Air M3?

The refurbished M3 is the right choice for a specific buyer profile, and at 8 GB it is now the budget end of the lineup rather than the all-round value pick.

Budget-conscious buyers. If spending $999 on a new laptop is uncomfortable, a refurbished 8 GB M3 Air starting around $749 delivers the vast majority of the M4's everyday capability for meaningfully less money.

Everyday task users. Browsing, email, documents, video calls, streaming: the M3 handles all of it without hesitation. The single-digit-to-low-double-digit CPU gap is irrelevant for these workloads.

Students. The MacBook Air is one of the best laptops for college, and the refurbished 8 GB M3 is the most affordable path into Apple Silicon for students who want reliability without the new-device price.

Buyers who do not need Apple Intelligence. If Writing Tools, Image Playground, and the new Siri AI are not part of your daily workflow, the 8 GB M3 saves you money without costing you anything you will notice.

Who Should Buy the MacBook Air M4?

New buyers prioritizing current value. At $999, the M4 Air is cheaper than the M3 was at launch while doubling the base RAM. If you are buying new, the M4 is the obvious choice.

Anyone buying refurbished at 16 GB. This is the biggest change for 2026. A refurbished 16 GB M4 starts around $826, essentially level with a 16 GB M3, so you get the faster chip, the 38 TOPS Neural Engine, the 12MP camera, and Thunderbolt 4 for the same money. At 16 GB, pick the M4.

Apple Intelligence power users. If Writing Tools, Image Playground, and the new Siri AI arriving with macOS Golden Gate are central to your workflow, the M4's 16 GB base and 38 TOPS Neural Engine give you the headroom to run them without memory pressure, and every M4 configuration clears the 12 GB memory requirement for the full feature set.

Remote workers on frequent video calls. The 12MP Center Stage camera is a genuine upgrade over the M3's 1080p webcam. If you spend significant time on Zoom, Teams, or FaceTime, the improvement is immediately noticeable.

Dual-monitor desktop users. The M4's ability to drive two external displays with the lid open is a practical advantage for anyone running a two-monitor setup. The M3 requires the lid to be closed for the same configuration.

The Bottom Line

If you are buying new, get the M4. Apple made it cheaper, more capable, and better configured for the AI era than the M3 was at launch. There is no reason to buy a new M3 Air today.

If you are open to refurbished, the decision now splits by RAM. For the cheapest usable machine, the 8 GB M3 around $749 is the value pick, provided you can live without heavy Apple Intelligence use. For a 16 GB machine, the refurbished M4 around $826 is the smarter buy: it lands within a few dollars of a 16 GB M3 while adding the faster chip, the 12MP camera, Thunderbolt 4, dual-monitor-with-lid-open support, and clearance for the full Siri AI feature set. The old advice to reach for a 16 GB M3 no longer holds now that the M4 costs the same refurbished.

The M5 Air's arrival is good news either way. Two generations of owners are trading in M3 and M4 units, creating a larger pool of quality refurbished stock at competitive prices.

For guidance on where to buy with the best warranty and return policies, see the best places to buy a refurbished MacBook and the refurbisher comparison tool. If you are still deciding between the Air and Pro lines, the MacBook Air M4 vs MacBook Pro M4 comparison covers that question in depth.

FAQ