PLO5 vs PLO4: What Actually Changes
PLO4 has 270,725 possible starting hands. PLO5 (5-card Omaha; live players know the hi-lo version as Big O) has 2,598,960, and the best of them is worse than the best PLO4 hand: measured by equity against one random hand, the strongest PLO5 holdings sit at 65.1-65.6%, while PLO4's top hand (A-A-T-T double-suited) gets 71.5%. That one comparison carries most of what you need to know about the fifth card. Everyone's hands get stronger in absolute terms, so every edge gets thinner in relative terms.
The numbers below come from our own engines: 200,000-trial simulations per hand class for the PLO5 and PLO6 rankings, and 2,000,000-trial baselines for the made-hand tables (the same data behind the hand distribution calculator). No public postflop solver data exists for PLO5 as of July 2026, ours included, so you will find no invented "PLO5 solver frequencies" here. Anyone quoting some should tell you where the solve came from.
The deal itself changes
| Dealt | PLO4 | PLO5 | PLO6 |
|---|---|---|---|
| At least two aces | 2.57% | 4.17% | 6.08% |
| Double-suited | 13.5% | 36.5% | - |
| Rainbow | 10.5% | impossible | impossible |
Aces arrive about 1.6x as often in PLO5, and by PLO6 someone at a 6-max table holds AA roughly every third hand. Double-suited stops being a premium feature and becomes the field: more than a third of PLO5 hands are double-suited, and a rainbow hand cannot exist (five cards, four suits). So "I have aces, double-suited" describes a much bigger slice of everyone's range, and the hands that used to feel special are now merely standard.
The river arrives heavier
Share of random hands holding each strength or better by the river, heads-up, from the 2M-trial baselines:
| By the river | PLO4 | PLO5 | PLO6 |
|---|---|---|---|
| Two pair or better | 70.6% | 82.5% | 90.1% |
| Straight or better | 24.9% | 35.3% | 45.1% |
| Flush or better | 13.6% | 20.0% | 26.5% |
| Full house or better | 6.9% | 10.4% | 14.2% |
Read the first row again: a completely random PLO5 hand finishes with two pair or better 82.5% of the time. Two pair is the river's participation trophy. The hands that actually win showdowns migrate up a full category: straights and flushes in PLO5 arrive about as often as two-pair-and-trips territory did in Hold'em, and one PLO5 river hand in ten is a full house or better.
The practical translation is the oldest PLO rule with the volume turned up: hand value lives in the nuts, and the price of second-best goes up with every extra card. A ten-high flush that was uncomfortable in PLO4 is close to unplayable for stacks in PLO5, because the extra card means more of everyone's range covers it.
Preflop: stronger everywhere means tighter than you think
The instinct "five cards, so I can play more hands" gets the direction wrong. Your hands improve, but so does every hand that calls or raises you, and showdown values inflate faster than your absolute strength does. The median PLO5 hand still wins 50% against random by construction; what changes is what it loses to when real money goes in.
What the equity data supports concretely: the entire top tier of PLO5 is aces plus a connected middle rundown with two suits working. All 142 statistically-tied best hands contain AA, 90% are double-suited, and the side cards cluster on T-9-8. Speculative hands need all five cards participating: the top-10% boundary hand is Q-Q-9-8-6 single-suited, a hand where every card matters. A dangler in PLO5 is a bigger handicap than in PLO4 because it wastes one of ten two-card combinations instead of one of six.
Position compounds all of it. With equities compressed preflop, the edges you keep are the structural ones, and acting last is the biggest structure there is.
Postflop: fewer heroes, more discipline
Without solver output to lean on, the honest postflop guidance comes from the distribution tables, and they say enough:
- Stack-off standards move up a category. The two-pair-or-better row means "I have two pair" carries almost no information in PLO5. Plan streets around nut potential and redraws, not made-hand labels.
- Non-nut draws lose value faster than non-nut made hands. Draw density rises for everyone, so when the flush comes in, the question is whose flush. Dominated draws are the quiet bankroll leak of PLO4 players moving to PLO5.
- Multiway pots concentrate the effect. Every extra player is another five-card range full of straights and flushes by the river; the strength-or-better table above is per player.
None of this requires new theory. It is the same nut-centric discipline PLO4 already demands, applied against a field whose river distribution shifted one full category up.
Moving over: what to actually change
Four adjustments cover most of the transition. Demand connectivity from all five cards and treat danglers as real damage. Raise your double-suited standards, since a third of the deck's hands share that feature now. Expect aces about 1.6x as often, yours and theirs, and plan 3-bet pots accordingly. And move every stack-off threshold up a notch, because the river tables say the field's hands did.
Check where any specific hand ranks in the PLO5 rankings, run exact matchups in the equity calculator, and see the full made-hand curves per street in the hand distribution calculator. All three are free and cover PLO4, PLO5, and PLO6.