Levelfamily
ClassLLM
Parametersnot in the notes
Contextnot in the notes
Releasednot in the notes
Opennessunknown
Runs onnot in the notes
Statusnot in the notes
Benchmark Results
vendor-reported
GPQA Diamondknowledge and reasoning
73.23
050100
Score in %. Higher is better.
LongCat-Flash-Chat model card
MMLUknowledge and reasoning
89.71
050100
Score in %. Higher is better.
LongCat-Flash-Chat model card
MMLU-Proknowledge and reasoning
82.68
050100
Score in %. Higher is better.
LongCat-Flash-Chat model card
SWE-bench Verifiedcoding
60.4
050100
Score in %. Higher is better.
LongCat-Flash-Chat model card
tau2-benchagents and tool use
73.68
050100
Score in %. Higher is better.
LongCat-Flash-Chat model card
Where this comes from
Every score names who ran it: vendor-reported, maintainer-run or independent. A rank is shown with the population it was ranked in (gap rule 3).
Lineage
LongCat-2.0 belongs to this familyLLM29 Jun 20261.6TLongCat-Flash (LongCat-Flash-Chat) belongs to this familyLLM1 Sep 2025560BWhere this comes from
Parent and child relations from model cards, Hugging Face base_model fields and the genealogy tables of the research notes. Confidence and evidence are the notes' own.
Identity
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.
Architecture and Size
- Architecture
- not in the notes
- Total parameters
- – sources
- Active parameters
- –
- Checkpoint parameters
- –
- Context length
- not in the notes
- Input
- not in the notes
- Output
- not in the notes
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).
Openness and Access
- Openness
- unknown
- Licence
- not in the notes sources
- Access routes
- not in the notes
Where this comes from
The licence file governs over registry tags and aggregator labels.
Deployment
- Runs on
- not in the notes
- Footprint
- not in the notes
- Runtimes
- not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.
Indonesia
- Indonesian support
- not stated
- Regional languages
- not in the notes
- Jakarta hosting
- unknown
- Languages
- not in the notes
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.
R&D Topics
No R&D topic links this model.
Industry Use Cases
No industry use case links this model.
Links
DeveloperMeituanbig tech, China
Meituanbig tech, ChinaModelLongCatMeituan, LLM
LongCatMeituan, LLMR&D Topicsnone recorded
Use Casesnone recorded
Who Runs Itnone recorded
Organisations 1
Sources
- arxiv.org/abs/2509.01322 https://arxiv.org/abs/2509.01322
- huggingface.co/meituan-longcat/LongCat-2.0 https://huggingface.co/meituan-longcat/LongCat-2.0
To cite this page: Project AURION, AI Use-Cases Research & Innovation, "LongCat", https://aurion.semai.id/models/meituan-longcat/, records of October 2026.