Which Cases Have Karambits & Butterfly Knives
Table of Contents
Karambit cases and Butterfly Knife cases do not overlap. No normal weapon case can unbox both models. Karambits come from legacy classic, Chroma, and Gamma knife pools. Butterfly Knives come from their own five-case route, including one case in the active weekly drop pool in 2026. If your target is specifically a Karambit, the ranked cases below are the relevant openings.
The important number is 0.26%. Every weapon case has a 0.26% rare-special-item chance, or roughly 1 knife or gloves item in 385 openings. Expected value means the average return across a huge number of opens, not the result from one lucky pull. Every case here has negative expected value. You usually lose money opening it, often before considering the fact that market prices move.
A Karambit | Fade can be a roughly $1K–$2K+ pull. A Karambit | Doppler Ruby can reach $5K+. Those are chase outcomes, not normal outcomes. The 0.26% special-item chance is also split across several knife models and finishes, so the chance of one exact Karambit finish is much lower than 1 in 385.
Methodology: item facts, rarity, float caps, and collection data come from the CS2 item database. Market levels are approximate as of 2026.
Quick answer: Karambit cases vs Butterfly Knife cases
The Karambit pools are spread across older cases. Classic pools contain finishes such as Fade and Case Hardened. Chroma cases add Doppler, Marble Fade, and Tiger Tooth finishes. Gamma cases add Gamma Doppler, Lore, Autotronic, Freehand, Bright Water, and Black Laminate.
Butterfly Knives appear in the Operation Breakout Weapon Case, Spectrum Case, Spectrum 2 Case, Operation Riptide Case, and Dreams & Nightmares Case. Dreams & Nightmares is the relevant active weekly-drop Butterfly option in 2026. None of the Karambit cases below are active weekly drops.
Operation Riptide is a common point of confusion. It can unbox Butterfly Knives, but its rare-special pool has no Karambit. Its knife pool contains Bowie Knife, Butterfly Knife, Falchion Knife, Huntsman Knife, and Shadow Daggers.
How CS2 case odds work
All weapon cases use the same headline rarity odds. Covert is the highest normal weapon-skin tier. Knives and gloves are Extraordinary, marked with ★, and sit in the separate rare-special slot rather than the Covert tier.
The 0.26% figure does not mean a 1-in-385 shot at your preferred knife. It means 1-in-385 for any rare special item in that case. On knife-only special pools, that means any knife. Then the result is divided between knife models, finishes, wear, and sometimes StatTrak variants.
Float is the number that sets visible wear. The standard tiers are Factory New at 0.00-0.07, Minimal Wear at 0.07-0.15, Field-Tested at 0.15-0.38, Well-Worn at 0.38-0.45, and Battle-Scarred at 0.45-1.00. Pattern index is separate. It controls pattern layout, such as Case Hardened blue coverage, Fade percentage, or Doppler phase.
Karambit case comparison, ranked by expected return
The expected-value column shows the average return percentage from the opening cost. It is not a guarantee and it does not include the emotional value of opening a case. The key is $2.49 in the US in-client store before tax. Regional pricing and tax can differ.
Ranked Karambit cases
1. CS:GO Weapon Case 2
CS:GO Weapon Case 2 is the best opening on this ranking by expected return, but it still loses about 26% of its cost on average. Its rare-special pool uses the original knife family, including the Karambit. The main chase is ★ Karambit | Fade, a finish that can land roughly in the $1K–$2K+ bracket depending on wear and pattern.
It is retired from normal weekly drops. A sealed copy has collector value as well as opening value, so compare the case’s cash value with the actual opening math before using a key.
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2. Chroma 3 Case
Chroma 3 is the lowest-cost Karambit route near the top of the expected-return ranking. It uses the Chroma knife pool, which is why ★ Karambit | Doppler Ruby is the headline chase. Ruby is a community-recognized gem outcome. Published rarity estimates differ widely, and Valve has never published an authoritative Ruby rate.
The case is retired. Its relatively lower opening cost does not make it a profitable open, but it reduces the cash needed per attempt compared with older collector cases.
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3. Chroma 2 Case
Chroma 2 offers the same broad Karambit finish family as the other Chroma cases. Regular Doppler phases are roughly comparable in frequency based on sampled inventories, not Valve-published percentages. Ruby, Sapphire, and Black Pearl are the genuinely rare outcomes, with Black Pearl generally considered rarer than Ruby or Sapphire.
The average open loses about 46% of the total cost. That is better than many legacy Karambit cases, though selling a sealed case can be the more rational route if you value certainty.
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4. eSports 2013 Winter Case
eSports 2013 Winter Case is a discontinued classic-pool Karambit case. It gives access to original finishes rather than Chroma or Gamma finishes, with ★ Karambit | Fade as the top listed chase. That matters if you want the old finish family rather than a Doppler-style blade.
Its average return is roughly half of opening cost. The case itself is more of a collector asset than a low-cost opening option, despite sitting ahead of several older cases by expected return.
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5. Chroma Case
Chroma Case is the first case in the Chroma series and carries a stronger scarcity premium than later entries. Its Karambit pool can produce Doppler, Marble Fade, Tiger Tooth, Damascus Steel, Rust Coat, and Ultraviolet finishes.
The big name is ★ Karambit | Doppler Ruby. Do not treat a Doppler phase as a fixed percentage outcome. Valve has never published phase rates. Community inventory samples suggest ordinary phases are roughly comparable, while Ruby is one of the gem outcomes that command major premiums.
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6. Gamma 2 Case
Gamma 2 Case is a Karambit case, but its highest listed chase pull is not a Karambit. It is ★ M9 Bayonet | Gamma Doppler Emerald. That makes Gamma 2 relevant to collectors chasing the Gamma finish family across the original knife models.
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Karambits from this pool can have Gamma Doppler, Lore, Autotronic, Freehand, Bright Water, or Black Laminate finishes. The case is retired, and the average open loses about 53% of its cost.
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7. eSports 2014 Summer Case
eSports 2014 Summer Case is another discontinued route to the original Karambit finish family. A Fade is the top chase, but the special-item odds remain exactly the same 0.26% as every other weapon case.
At about $8.3 per opening, it costs less to try than the older eSports collector cases. Its expected return is still only roughly 42% of spend. The sealed case has a clearer scarcity story than an open has a return story.
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8. Gamma Case
Gamma Case brought the Gamma knife family to the original knife models, including the Karambit. Gamma Doppler finishes have four regular phases plus Emerald. The normal phases are roughly comparable in frequency according to community estimates. Emerald is the rare gem result.
Like Gamma 2, this case’s top listed pull is ★ M9 Bayonet | Gamma Doppler Emerald. A Karambit remains possible, but do not open Gamma purely because the M9 Emerald headline is expensive.
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9. Operation Vanguard Weapon Case
Operation Vanguard Weapon Case sits in the original Karambit pool. That means classic finishes are the attraction, not Doppler or Gamma Doppler outcomes. ★ Karambit | Fade is the top chase pull.
The expected return is roughly 34% of opening cost, leaving an average loss of about 66%. It is retired from weekly drops, so its market behavior depends on both opening demand and sealed-case collector demand.
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10. CS:GO Weapon Case 3
CS:GO Weapon Case 3 is a classic-pool Karambit case with a top chase of ★ Karambit | Fade. It is a retired case, and each open costs about $10 after including the US in-client key price before tax.
Its expected return is only roughly 34% of spend. That puts the average loss at about 66%. If you already hold multiple sealed cases, instant cash-out can make more sense than converting a known asset into a string of low-tier outcomes.
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11. Winter Offensive Weapon Case
Winter Offensive Weapon Case uses the old Karambit pool. It can produce the classic Case Hardened finish, where a blue gem is a community label for unusually high blue coverage. Blue-gem tiers are community conventions, not official Valve rankings.
A pattern seed is one pattern index out of 1,000 possible layouts. One exact seed is roughly 0.1% of that skin’s drops, before factoring in the odds of unboxing the Karambit itself. This case’s listed top pull is ★ Karambit | Fade.
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12. Operation Phoenix Weapon Case
Operation Phoenix Weapon Case is one of the less expensive retired Karambit cases to open, but its lower entry cost does not improve the return rate. You get back roughly 26% of what you spend on average and lose about 74%.
The Karambit pool is classic. ★ Karambit | Fade is the top listed pull. For a seller holding Phoenix cases, the key question is simple: do you want a known case value now, or a 0.26% shot at any special item?
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13. CS:GO Weapon Case
CS:GO Weapon Case is an expensive collector case, with an opening cost around $100 including the key. It still has only the shared 0.26% rare-special chance. The large case price changes the financial picture, not the knife odds.
This is an original Karambit pool, with ★ Karambit | Fade as the listed top chase. Its expected return is roughly 25% of spend, so the average open loses about 75%. Sealed supply scarcity is the central reason to hold this case rather than open it.
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14. Operation Bravo Case
Operation Bravo Case has substantial collector pricing, but weak opening math. An open costs about $49 and returns roughly 21% of that cost on average. That is an average loss of about 79%.
It remains a classic Karambit case, so it can produce the older finish family and has ★ Karambit | Fade as its top listed pull. The rarity of the sealed case is easier to assess than the outcome of any individual open.
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15. eSports 2013 Case
eSports 2013 Case has the weakest expected return in this ranking. About $60 goes into the case and key, while the average return is roughly 13% of spend. That translates to an average loss of about 87%.
It is discontinued and uses the original Karambit pool. ★ Karambit | Fade is the headline chase, but the high collector cost makes this a poor route for someone who only wants a chance at a knife. Holding or cashing out a sealed copy is the more controlled decision.
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Best Karambit cases by statistic
Chroma 3 is the practical low-cost choice if you are opening for entertainment and accept the negative expectation. CS:GO Weapon Case 2 is the best mathematical option on this page, although a 26% average loss is still a loss. For collector cases at the expensive end, sealed value often has more logic than opening value.
How case opening costs work
An opening has two costs. First is the case, whose price is set by its market supply and demand. Second is the case key. The US in-client key price is a fixed $2.49 before tax, not a global market price. Regional pricing and tax vary.
The in-client key is a fixed store purchase. The case side is market-driven and can be traded before opening. This difference matters most for retired cases. A case can appreciate because fewer sealed copies remain, while its key cost stays fixed in the relevant store region.
Why do openings usually lose money? Most outcomes are Mil-Spec or Restricted. Only 0.64% of opens land in Covert, and only 0.26% reach the rare-special slot. A valuable knife exists in the pool, but its value is spread over a large number of much lower-value results.
The 2026 market also has another supply route for knives. Five regular Covert skins can produce a regular knife or gloves item through the updated trade-up system, while five StatTrak Covert skins can produce a StatTrak knife. Gloves have no StatTrak version. That added knife-supply pressure and made mainstream knife prices more volatile.
Verdict
If you are searching for karambit cases, start with the finish family you actually want. Classic-pool cases are for Fade, Case Hardened, Slaughter, Blue Steel, and related older finishes. Chroma cases are the route to Doppler and Ruby. Gamma cases are the route to Gamma Doppler and Emerald, although their top listed chase pull is an M9 Bayonet rather than a Karambit.
Do not open cases expecting profit. The best expected-return case here still loses about 26% on average. For collectors with old sealed cases, holding can make sense if scarcity is the thesis. For sellers who would rather lock in value than take repeated low-odds outcomes, skins.cash provides an instant cash-out route without creating a listing.
FAQ
Is there a case that can unbox both a Karambit and a Butterfly Knife?
No. Karambits and Butterfly Knives are in separate rare-special-item pools. No normal weapon case has both knife models.
What are the odds of unboxing a Karambit from a case?
The chance of any rare special item is 0.26%, or roughly 1 in 385 openings. Your chance of one specific Karambit is lower because the rare-special pool is split between several knife models and finishes.
Which case has the best expected return for a Karambit chase?
CS:GO Weapon Case 2 ranks first here. It returns roughly 74% of opening cost on average, which still means an average loss of about 26%.
Which Karambit case is cheapest to open?
Chroma 3 Case is the cheapest entry in this ranking at about $5.1 per open, including a $2.49 US in-client key before tax.
Can active weekly-drop cases unbox a Karambit in 2026?
No Karambit case is in the normal active weekly drop pool in 2026. Dreams & Nightmares is the active relevant case for Butterfly Knife openings, not Karambit openings.
Are Doppler Ruby and Gamma Doppler Emerald drop rates known?
No authoritative rate is published by Valve. Community estimates vary by source and sampled inventories. Regular Doppler phases are roughly comparable in frequency, while Ruby, Sapphire, Emerald, and Black Pearl are the rare gem outcomes.
Should I sell or open an old Karambit case?
Check the case’s sealed value against its opening cost and average loss first. Retired collector cases can have meaningful sealed-case demand, while every opening here has negative expected value. Selling is the controlled option if you prefer known cash value.
