Who would win?
Goku (Mastered Ultra Instinct) vs Saitama (Serious)
Goku has the edge in raw power, but only just — one tier is an advantage, not an answer. Neither fighter can finish the other. Whatever each one throws, the other survives it, so force alone will never settle it — whatever decides this happens somewhere else. Saitama is far harder to put down — outlasts over time. Saitama takes it, but it is close enough that a different day might go the other way.
Goku from Dragon Ball Super in Mastered Ultra Instinct, the state the angels fight in, where his body dodges and counters on its own without conscious thought.
The hero of One Punch Man who beats everything with a single punch. This is Saitama taking a fight seriously, the way he did against Garou.
📜 The evidenceWhat each fighter has actually shown, and the claims that don't hold up▼
Goku (Mastered Ultra Instinct)
- A Kamehameha left Full Power Jiren on the ground, and Jiren said the match was over.DBS ep. 130 · source
- Knocked Full Power Jiren around “with ease” and landed a strong blow to his chest.DBS ep. 129 · source
- Dodged Jiren's attacks automatically, appeared behind him and crushed his ki ball by hand, then deflected a blast aimed at the Universe 7 stands.DBS ep. 129–130 · source
- His clash with Jiren wrecked the Tournament of Power arena and cracked the gods' viewing stands.DBS ep. 129 · source
- Out-fought Jiren, then his body gave out from the strain before he could finish, and Jiren knocked him out of the arena.DBS ep. 129–130 · source
- “Outpaced Jiren the whole fight” He overwhelmed Jiren at first, then Full Power Jiren took the upper hand until Goku turned it round with a Kamehameha.DBS ep. 129–130 · source
Saitama (Serious)
Not fact-checked in detail yet. This result uses their current ratings, which are still being checked against the page.
The full breakdown
For the stat fans: every check the engine ran, fighting in character and with no holding back (engine v1.8.36).
In Character
In short
Goku has the edge in raw power, but only just — one tier is an advantage, not an answer. Neither fighter can finish the other. Whatever each one throws, the other survives it, so force alone will never settle it — whatever decides this happens somewhere else. Saitama is far harder to put down — outlasts over time. Saitama takes it, but it is close enough that a different day might go the other way.
The tables below show every check behind this, with the numbers the engine used.
Full engine breakdown
Power bracket
| Fighter | Bracket |
|---|---|
| Goku | 10 |
| Saitama | 9 |
Gap of 1. Awards 45 points to Goku.
Attribute clash
| Axis | Attacker | vs defence | Points |
|---|---|---|---|
| Energy | Goku (9) | Saitama 7 (UNDEFENDED x1.5) | +23 |
| Strength | Saitama (10) | Goku 8 | +10 |
Ability interactions
| Type | Interaction | Points |
|---|---|---|
| invulnerability | Goku out-tiers the attacker; durability gate raised +1 (now 10) | — |
Soft counter: reduces an ability's effectiveness without nullifying it. Hard counter: the ability does not function against this opponent at all.
Win conditions tested
| Check | Goku | Saitama |
|---|---|---|
| Kill | FAILED reach 7, needs 8 | FAILED reach 7, needs 8 |
| Contain | FAILED no containment method | FAILED no containment method |
A kill lands only when the attacker's reach meets or beats the defender's resistance. Containment must clear two bars: it has to out-reach the opponent's escape and reach 8 to hold permanently — below that it is a temporary hold that lapses. A fighter who fails both cannot end the fight, however much damage they do — which is how an outmatched fighter can still force a stalemate.
Can they threaten at all?
| Fighter | Has a usable offensive route |
|---|---|
| Goku | YES |
| Saitama | YES |
This checks only whether a fighter can meaningfully attack at all. It is tested before the win conditions above — so a fighter can pass here and still have no way to finish the opponent.
Rulings
| Goku has no rating for resisting being knocked out or shut down, so it is read from their tier as 7 rather than as none (incap resistance 0 -> 7) |
| Saitama has no rating for resisting being knocked out or shut down, so it is read from their tier as 6 rather than as none (incap resistance 4 -> 6) |
| Neither fighter can end this, so raw scale is not what decides it — Goku's bracket advantage is reduced from 45 to 15 |
| Neither side can finish the other, so the fight is decided by who can keep going — Goku's stamina gives out first while Saitama can continue |
| Neither side can kill or contain the other; Saitama is far harder to put down -> outlasts over time |
Final score
| Key awards | Points |
|---|---|
| Neither side can kill or contain the other; Saitama is far harder to put down -> outlasts over time | +30 |
The largest awards, not a full ledger — bracket gap, attribute clash and counter points are listed in their own sections above.
Goku 28 · Saitama 50 — margin n/a, graded unresolved. Points accumulate from the checks above. The engine resolves the fight; the AI only narrates the result it reached.
No Holding Back
In short
Morals make no difference to this one — it resolves exactly as above.
Full engine breakdown
Power bracket
| Fighter | Bracket |
|---|---|
| Goku | 10 |
| Saitama | 9 |
Gap of 1. Awards 45 points to Goku.
Attribute clash
| Axis | Attacker | vs defence | Points |
|---|---|---|---|
| Energy | Goku (9) | Saitama 7 (UNDEFENDED x1.5) | +23 |
| Strength | Saitama (10) | Goku 8 | +10 |
Ability interactions
| Type | Interaction | Points |
|---|---|---|
| invulnerability | Goku out-tiers the attacker; durability gate raised +1 (now 10) | — |
Soft counter: reduces an ability's effectiveness without nullifying it. Hard counter: the ability does not function against this opponent at all.
Win conditions tested
| Check | Goku | Saitama |
|---|---|---|
| Kill | FAILED reach 7, needs 8 | FAILED reach 7, needs 8 |
| Contain | FAILED no containment method | FAILED no containment method |
A kill lands only when the attacker's reach meets or beats the defender's resistance. Containment must clear two bars: it has to out-reach the opponent's escape and reach 8 to hold permanently — below that it is a temporary hold that lapses. A fighter who fails both cannot end the fight, however much damage they do — which is how an outmatched fighter can still force a stalemate.
Can they threaten at all?
| Fighter | Has a usable offensive route |
|---|---|
| Goku | YES |
| Saitama | YES |
This checks only whether a fighter can meaningfully attack at all. It is tested before the win conditions above — so a fighter can pass here and still have no way to finish the opponent.
Rulings
| Goku has no rating for resisting being knocked out or shut down, so it is read from their tier as 7 rather than as none (incap resistance 0 -> 7) |
| Saitama has no rating for resisting being knocked out or shut down, so it is read from their tier as 6 rather than as none (incap resistance 4 -> 6) |
| Neither fighter can end this, so raw scale is not what decides it — Goku's bracket advantage is reduced from 45 to 15 |
| Neither side can finish the other, so the fight is decided by who can keep going — Goku's stamina gives out first while Saitama can continue |
| Neither side can kill or contain the other; Saitama is far harder to put down -> outlasts over time |
Final score
| Key awards | Points |
|---|---|
| Neither side can kill or contain the other; Saitama is far harder to put down -> outlasts over time | +30 |
The largest awards, not a full ledger — bracket gap, attribute clash and counter points are listed in their own sections above.
Goku 28 · Saitama 50 — margin n/a, graded unresolved. Points accumulate from the checks above. The engine resolves the fight; the AI only narrates the result it reached.