Bambu Lab P1S vs Elegoo Neptune 4 Pro
The Bambu Lab P1S and Elegoo Neptune 4 Pro are both prosumer-tier printers, but the P1S costs 2.1× as much — so the question is what the extra money buys. Note that the P1S has been replaced by the P2S and is no longer sold new. The P1S costs $289 more and gets you an enclosed chamber (with PA, PA-CF and PC on its materials list) and 4-slot multicolor.
💰Elegoo Neptune 4 Pro is $289 cheaper (53% less)
📐Bambu Lab P1S has 25% more build volume
🏠Only Bambu Lab P1S has an enclosure — and it adds PA, PA-CF, PC to the materials list
🎨Only Bambu Lab P1S supports multicolor printing (4 slots)
Cross-ecosystem comparison: These printers use different software ecosystems. Accessories, filament profiles, and community support are not interchangeable between brands. Consider the total ecosystem cost, not just the printer price.
Bambu Lab P1S
Buy/Wait:Superseded
This printer is no longer sold new. It has been replaced by the Bambu Lab P2S.
Best for: Makers who need an enclosed printer for ABS, ASA, PA, and PC at prosumer price — now available at clearance pricing after P2S launch.
Full details →Elegoo Neptune 4 Pro
Buy/Wait:Wait
Overdue for a refresh — no successor announced yet. Prices should be at their lowest
Best for: Budget-conscious makers who want a capable bed-slinger with Klipper firmware for customization — without Bambu's closed ecosystem or Prusa's premium pricing.
Full details →| Bambu Lab P1S | Elegoo Neptune 4 Pro |
|---|
| Pricing |
| Starting Price | $549 | ★ $260 |
| Print Specs |
| Tier | Prosumer | Prosumer |
| Motion | CoreXY | BedSlinger |
| Build Volume | ★ 256 × 256 × 256 mm | 225 × 225 × 265 mm |
| Max Speed | 500 mm/s | 500 mm/s |
| Multicolor | ★ ✅ 4 slots | ❌ No |
| Enclosure | ★ ✅ | ❌ |
| Auto Calibration | ✅ | ✅ |
| Open Source | ❌ | ❌ |
| Upgrade Kit | — | — |
| Buy Timing |
| Released | Jul 5, 2023 | Jul 15, 2023 |
| Cycle length | ~335 days | ~450 days |
| Cycle advice | Superseded | Wait |
| Deals advice | Clearance | Buy |
| Next model | — | — |
Timing: When to Buy
The P1S has been replaced by the P2S and is no longer sold new, so there is no release cycle left to time — any unit you find now is leftover or second-hand stock.
The Neptune 4 Pro was released on Jul 15, 2023, 1,216 days ago. Its previous release cycle ran about 450 days; it is now 766 days past that point and no successor has been announced.
On timing alone, the Neptune 4 Pro is the safer buy right now — it is 766 days past its ~450-day cycle with no successor announced, while the P1S has already been replaced by the P2S.
Cycle and deal status as of November 12, 2026. See the launch calendar →
Deals & Pricing
The Neptune 4 Pro lists at $260 and the P1S at $549 — $289 apart, so the P1S costs 111% more.
Per litre of build volume, that works out to $33 for the P1S versus $19 for the Neptune 4 Pro — the Neptune 4 Pro is the better value per litre as well.
- P1S: No longer sold new, so there is no sale calendar to track — judge any listing against the P2S's $549 list price.
- Neptune 4 Pro: On sale until Dec 5, 2026. Black Friday 2026 — Elegoo consistently offers deep Black Friday discounts on the Neptune line.
Who Should Choose Each
Choose the Bambu Lab P1S if…
- you find it at a clearance price — it is no longer sold new, and the P2S is its replacement
- you want our higher-rated printer — 8.6 vs 7.7 out of 10
- you want to print PA, PA-CF and PC — it is enclosed and lists them, while the Neptune 4 Pro is open-frame
- you want multicolor prints — it supports 4 slots, while the Neptune 4 Pro is single-color
- you print large parts — its 256 × 256 × 256 mm build volume holds 25% more than the Neptune 4 Pro's 225 × 225 × 265 mm
Choose the Elegoo Neptune 4 Pro if…
- you want to spend less — it is $289 cheaper ($260 vs $549)
- you are buying now — it is the safer pick on timing (overdue for refresh, vs superseded for the P1S)
- your prints fit within 225 × 225 × 265 mm — then the P1S's extra build volume is money you do not need to spend
- you are buying before Dec 5, 2026 — it is in Black Friday 2026 right now
Our Take
Buy the Neptune 4 Pro. The P1S has already been replaced by the P2S and is no longer sold new, so it is only worth considering at a clearance price. If the P1S appealed to you, the fair comparison today is the Neptune 4 Pro against the P2S.
Compare Bambu Lab P2S vs Elegoo Neptune 4 Pro →
How we judge timing and deals: read our methodology →
Quick Winner by Buyer Type
💰
Budget pick
Elegoo Neptune 4 Pro
$260 vs $549
📐
Large prints
Bambu Lab P1S
256×256×256 mm
⚡
Fastest prints
Tie
Both 500 mm/s
🔓
Open ecosystem
Tie
Neither open source
🧪
Engineering filaments
Bambu Lab P1S
5 vs 2 listed
🎨
Multicolor
Bambu Lab P1S
4 slots vs none
⭐
Editor score
Bambu Lab P1S
8.6 vs 7.7
🗓
Buy-now timing
Elegoo Neptune 4 Pro
Overdue for refresh
The Gaps That Matter
💰PriceNeptune 4 Pro wins
$260 vs $549 — 53% less than the P1S
🏠EnclosureP1S wins
Enclosed P1S vs open-frame Neptune 4 Pro
PA, PA-CF and PC appear only on the P1S's materials list.
🎨MulticolorP1S wins
4 slots vs single-color
📐Build volumeP1S wins
256 × 256 × 256 mm vs 225 × 225 × 265 mm (16.8 L vs 13.4 L)
The Neptune 4 Pro tops out at 225 × 225 × 265 mm; anything larger has to be printed in pieces.
🗓TimingNeptune 4 Pro wins
Neptune 4 Pro: Overdue for refresh · P1S: Superseded
⭐Editor scoreP1S wins
8.6 vs 7.7 out of 10
Materials
PANylon — strong and wear-resistant, needs dry storage
PA-CFCarbon-fibre nylon — very stiff, abrasive to standard nozzles
PCPolycarbonate — extremely tough, challenging to print
PLAEasy to print, no enclosure needed — everyday parts
PETGTougher, slightly flexible, moisture-resistant
ABSHeat and impact resistant — needs enclosure
ASAUV-stable ABS alternative — outdoor parts, needs enclosure
TPUFlexible rubber-like — phone cases, gaskets, wheels
—
Why buy each?
Bambu Lab P1S
Full enclosure with chamber heatingActive chamber temperature control enables reliable ABS, ASA, PA, and PC printing without warping.
CoreXY speed and precision500 mm/s print speed with Bambu's vibration compensation delivers fast, accurate prints.
Now at clearance pricesWith the P2S released, P1S prices are at their lowest — an opportunity for budget-conscious buyers.
Elegoo Neptune 4 Pro
Klipper firmware out of the boxThe Neptune 4 Pro ships with Klipper pre-installed — enabling advanced input shaping, pressure advance, and configuration flexibility without modding.
500 mm/s at budget pricingA 500 mm/s rated speed at a price significantly below Bambu and Prusa alternatives.
Auto calibrationFull automatic bed leveling reduces setup time and calibration friction.