The official card describes a 560B MoE with about 18.6B–31.3B dynamically active parameters, reports 89.71 on MMLU and 89.65 on IFEval, and documents LongCat tool tags.
Hugging Face (the official Meituan LongCat model card) · Read evidenceLongCat Flash Chat · Reviews and evidence
Which LongCat Flash Chat conclusions hold up?
Browse public evaluations by topic, source identity, and evidence type. Different versions, tiers, and harnesses are not treated as directly comparable.
This is a third-party source navigator, not a Tabbit test. Use the original source for live metrics; unknown values remain unknown.
Editorial takeaways
Editorial takeaways
The official Change Log records Flash-Chat API launches, upgrades, and retirement or migration points; it is useful for endpoint support checks, not answer quality.
LongCat API Platform Change Log · Read evidenceA LocalLLaMA discussion covers agent capability and deployment expectations, useful for selecting hypotheses to test; it is not a reproducible benchmark.
Reddit r/LocalLLaMA · Read evidenceSelected evidence
Media / benchmarkVendor report
LongCat-Flash-Chat Official Model Card: MoE Architecture, Benchmarks, and Tool Capabilities
The official card describes a 560B MoE with about 18.6B–31.3B dynamically active parameters, reports 89.71 on MMLU and 89.65 on IFEval, and documents LongCat tool tags.
SourceHugging Face (the official Meituan LongCat model card)
PublishedUnknown
Collected2026-09-20
Unverified: the original source could not be rechecked.
- Condition
- Model/version: LongCat-Flash-Chat 560B MoE.
- Condition
- Harness/sample: card tables and stated settings; full prompts, repeats, and failures unknown.
- Condition
- Date: card reopened 2026-09-20.
Media / benchmarkEditorial analysis
LongCat Official Change Log: Flash-Chat API Launch, Upgrades, and Retirement/Migration Boundaries
The official Change Log records Flash-Chat API launches, upgrades, and retirement or migration points; it is useful for endpoint support checks, not answer quality.
SourceLongCat API Platform Change Log
Published2025-08-29
Collected2026-09-20
Unverified: the original source could not be rechecked.
- Condition
- Version/scope: aliases and lifecycle notes in the Change Log.
- Condition
- Harness/sample: release and migration text; no fixed benchmark.
- Condition
- Date: page reopened 2026-09-20.
CommunityPersonal experience
Reddit: Community Observations on LongCat-Flash-Chat 560B MoE Speed and Local Deployment
A LocalLLaMA discussion covers agent capability and deployment expectations, useful for selecting hypotheses to test; it is not a reproducible benchmark.
SourceReddit r/LocalLLaMA
Published2025-08-31
Collected2026-09-20
Unverified: the original source could not be rechecked.
- Condition
- Model/version: source identifies the discussed model; client and runtime are not normalized.
- Condition
- Harness/sample: personal report without fixed tasks or repeat rule.
- Condition
- Date: source reopened 2026-09-20.
All sources
All sources
Media / benchmarkVendor report
LongCat-Flash-Chat Official Model Card: MoE Architecture, Benchmarks, and Tool Capabilities
The official card describes a 560B MoE with about 18.6B–31.3B dynamically active parameters, reports 89.71 on MMLU and 89.65 on IFEval, and documents LongCat tool tags.
SourceHugging Face (the official Meituan LongCat model card)
PublishedUnknown
Collected2026-09-20
Unverified: the original source could not be rechecked.
- Condition
- Model/version: LongCat-Flash-Chat 560B MoE.
- Condition
- Harness/sample: card tables and stated settings; full prompts, repeats, and failures unknown.
- Condition
- Date: card reopened 2026-09-20.
Media / benchmarkEditorial analysis
LongCat Official Change Log: Flash-Chat API Launch, Upgrades, and Retirement/Migration Boundaries
The official Change Log records Flash-Chat API launches, upgrades, and retirement or migration points; it is useful for endpoint support checks, not answer quality.
SourceLongCat API Platform Change Log
Published2025-08-29
Collected2026-09-20
Unverified: the original source could not be rechecked.
- Condition
- Version/scope: aliases and lifecycle notes in the Change Log.
- Condition
- Harness/sample: release and migration text; no fixed benchmark.
- Condition
- Date: page reopened 2026-09-20.
CommunityPersonal experience
Reddit: Community Observations on LongCat-Flash-Chat 560B MoE Speed and Local Deployment
A LocalLLaMA discussion covers agent capability and deployment expectations, useful for selecting hypotheses to test; it is not a reproducible benchmark.
SourceReddit r/LocalLLaMA
Published2025-08-31
Collected2026-09-20
Unverified: the original source could not be rechecked.
- Condition
- Model/version: source identifies the discussed model; client and runtime are not normalized.
- Condition
- Harness/sample: personal report without fixed tasks or repeat rule.
- Condition
- Date: source reopened 2026-09-20.
LongCat Flash Chat
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