# The 10 Best Anime Series of All Time

> ChatGPT, Claude and Gemini, asked 5 times each, rank Fullmetal Alchemist: Brotherhood as the #1 of the best anime series of all time, followed by Cowboy Bebop and Attack on Titan. Fullmetal Alchemist: Brotherhood (2009–2010). All 3 AIs put it first.

Source: https://clankerlists.com/lists/best-anime-series-of-all-time · Collected 2026-10-06 · TV

| Rank | Pick | ChatGPT | Claude | Gemini |
|---|---|---|---|---|
| 1 | [Fullmetal Alchemist: Brotherhood](https://clankerlists.com/items/fullmetal-alchemist-brotherhood) (2009–2010) | #1 | #1 | #1 |
| 2 | [Cowboy Bebop](https://clankerlists.com/items/cowboy-bebop) (1998) | #3 | #2 | #4 |
| 3 | [Attack on Titan](https://clankerlists.com/items/attack-on-titan) (2013–2023) | #2 | #7 | #2 |
| 4 | [Steins;Gate](https://clankerlists.com/items/steins-gate-tv-series) (2011) | #5 | #3 | #3 |
| 5 | [Hunter x Hunter](https://clankerlists.com/items/hunter-hunter-2011-tv-series) (2011) | #7 | #4 | #5 |
| 6 | [Neon Genesis Evangelion](https://clankerlists.com/items/neon-genesis-evangelion) (1995–1996) | #6 | #5 | #6 |
| 7 | [Monster](https://clankerlists.com/items/monster-manga) (2004–2005) | #4 | #8 | #7 |
| 8 | [Death Note](https://clankerlists.com/items/death-note) (2006–2007) | #10 | #6 | #8 |
| 9 | [Legend of the Galactic Heroes](https://clankerlists.com/items/legend-of-the-galactic-heroes) (1988–1997) | #9 | #11 | #11 |
| 10 | [One Piece](https://clankerlists.com/items/one-piece) | #8 | — | — |

## 1. Fullmetal Alchemist: Brotherhood

Two brothers chase the Philosopher's Stone across a world built on alchemy. Tight plotting, a killer cast and a perfect landing make it the one pick every list agreed on, from first to last.

## 2. Cowboy Bebop

Bounty hunters drift through space in a stylish blend of noir, western and jazz. Just 26 episodes, endlessly rewatchable, and the usual gateway anime for newcomers. Claude had it near the very top.

## 3. Attack on Titan

Humanity hides behind giant walls from man-eating Titans, until the story twists into something far bigger and darker. A cultural juggernaut with a finale that still divides fans. Claude ranked it much lower than the others.

## 4. Steins;Gate

A self-proclaimed mad scientist discovers he can send messages to the past, and every fix makes things worse. A slow-burn sci-fi thriller with one of anime's best payoffs.

## 5. Hunter x Hunter

Young Gon sets out to find his father and become a Hunter. It starts as adventure and grows into deep, inventive power systems and unforgettable arcs, especially Chimera Ant.

## 6. Neon Genesis Evangelion

Teens pilot giant biomechanical machines while everyone involved unravels psychologically. The deconstruction that reshaped mecha and left a mark on nearly everything since. Still arguing-in-the-comments material.

## 7. Monster

A brilliant surgeon saves a boy's life, then spends years hunting the killer that boy became. Patient, moody and morally knotty. ChatGPT placed it far higher than Claude did.

## 8. Death Note

A student finds a notebook that kills anyone whose name is written in it, and a detective rises to stop him. A tense cat-and-mouse game that made it a global gateway into anime.

## 9. Legend of the Galactic Heroes

A sweeping space opera of war, politics and rival geniuses across a galaxy. A cult classic with a huge reputation, though only some runs found room for it, which makes this spot hard-won.

## 10. One Piece

Luffy and his Straw Hat crew chase the ultimate treasure across a vast, endlessly inventive world. Its place here comes entirely from ChatGPT, which named it every time; the other two never did.

## Lone wolves

- One Piece: only ChatGPT
- Mob Psycho 100: only Claude
- Gurren Lagann: only Claude
- Vinland Saga: only Gemini

## Questions

**What anime series should I watch right now?**

Start with Fullmetal Alchemist: Brotherhood (2009–2010). Already seen it? Try Cowboy Bebop or, for something less obvious, One Piece (only ChatGPT picked it).

**According to AI, what is #1 of the best anime series of all time?**

Fullmetal Alchemist: Brotherhood (2009–2010). All 3 AIs put it first.

**Do ChatGPT, Claude and Gemini agree on the best anime series of all time?**

Partly. 9 of the 10 picks made all 3 AIs' lists. The biggest split was One Piece: ChatGPT #8, Claude didn't list it, Gemini didn't list it.

**Which best anime series of all time did only one AI pick?**

One Piece (only ChatGPT); Mob Psycho 100 (only Claude); Gurren Lagann (only Claude); Vinland Saga (only Gemini).

**How was this ranking of the best anime series of all time made?**

We asked ChatGPT, Claude and Gemini "What are the 10 best anime series of all time? Rank them from 1 to 10, best first." 5 times each, every time in a fresh chat, in 2026-10. A #1 earns 10 points and a #10 earns 1; each AI's points are averaged over its runs and each AI gets an equal say.