> LongCat-Flash is an open-weights AI model from Meituan, released 1 Sep 2025.

[Models](https://themodelindex.org/models/) /[Meituan](https://themodelindex.org/labs/meituan/)

# LongCat-Flash

Meituan

Released 1 Sep 2025

Open

[Compare](https://themodelindex.org/compare/longcat-flash-vs-gpt-5/) [Announcement](https://huggingface.co/meituan-longcat/LongCat-Flash-Chat)

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Index score

Not yet evaluated independently

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Core tests taken

no independent results yet

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Versus the frontier at release

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Price per million tokens

no public API price found

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Context window

tokens it reads at once

## Where it sits · on the frontier

_Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_

Not plotted: no index score yet.

## Test results · by area · tick = best by any model

Reasoning & knowledge

no evidence yet

GPQA Diamond

no result

Humanity's Last Exam

no result

Maths

no evidence yet

FrontierMath T1-3

no result

Coding

no evidence yet

SWE-bench Verified

no result

Terminal-Bench

no result

Agents

no evidence yet

APEX-Agents

no result

Novel problems

no evidence yet

ARC-AGI-2

no result

Long tasks

no evidence yet

METR time horizon

no result

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

## What others say · rank on each leaderboard

LMArena · Coding

coding questions in chat

#107

of 383 · 1472

LMArena · Maths

maths questions in chat

#118

of 373 · 1415

LMArena · Text

overall chat quality, judged by people

#139

of 388 · 1401

LMArena · Creative writing

creative writing

#181

of 386 · 1330

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

## Best at · top three among current models

Not in the top three among current models on any category we track.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

## Facts and sources

Released

1 Sep 2025

Announcement

[huggingface.co ↗](https://huggingface.co/meituan-longcat/LongCat-Flash-Chat)

Release entry

LongCat-Flash

Scored as

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Artificial Analysis index

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Output speed

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Hugging Face

not linked

## Meituan releases · around this one

LongCat-Flash

Open

1 SEP 2025

LongCat 2.0

Open

20 JUL 2026

~140 est.

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Source: https://themodelindex.org/models/longcat-flash/ · The Model Index · data as of 2026-10-01