Meituan Longcat·meituan-longcat/LongCat-Flash-Chat
LongCat Flash Chat is ModelCap current-board rank #70 with Index 53.8 (Modeled · peer benchmarks), from the ModelCap Index as of 12 Sept 2026, 20:59 UTC.
LongCat Flash Chat weight access is open weights, from ModelCap classification of published repository metadata as of 12 Sept 2026, 20:59 UTC.
Snapshot facts · download the public dataset · methodology
OpenRouter endpoint status could not be refreshed. This model is not treated as currently served until a successful observation arrives.
Current provider status is unavailable.
Structured rows reported in this exact model repository at the pinned revision below. They are the publisher talking about itself: never measured evidence, never a score input on their own. Rows marked as used were laddered against independently measured peers inside the launch-card channel of this model's modeled placement, with the replay-measured optimism haircut applied; the others played no part.
No general-family board lists this model yet. Its point estimate is the precision-weighted mean of every channel that spoke for it; each channel’s share is the weight it carried. Independent measurements replace this placement as boards list the model.
BES normalizes admitted public benchmark evidence for measured Index rows. Its legacy score and observables prior do not define the public language rank.
These adoption and deployment observations remain context only. They do not change this model's ModelCap Index score or rank.
The bounded 0–100 capability score blends each source’s competitive placement with its published achievement, then combines capability families. Evidence breadth adds a modest uncertainty adjustment; price and popularity are not part of benchmark-led rank.
Experimental estimate. This layer predicts from admitted evidence and safe metadata only. It never enters ModelCap Score or rank.
Missing: artifactReproducibility.base-lineage, deployability.independent-provider-records, deployability.measured-provider-uptime, deployability.published-provider-pricing, deployability.declared-capacity, evaluationProvenance.admitted-evaluation-observations, evaluationProvenance.capability-family-breadth, evaluationProvenance.evaluation-source-diversity, evaluationProvenance.identity-and-source-confidence, evaluationProvenance.evaluation-dataset-revisions.
A metadata completeness and deployability index—not a safety certification, quality grade, or production-readiness claim.
Market Gravity uses OpenRouter’s full-catalogue popularity order. Sparse Vercel top-ten observations appear only when published and do not affect the score.
This model is visible because it is available in the live catalogue, but it has no trustworthy community result yet. ModelCap does not infer a quality score from price, features, or market activity.
OpenRouter weekly popularity across the full model catalogue.
Independent providers versus the model's open or closed cohort, weighted by uptime.
Hugging Face 30-day downloads for open models; neutral for closed models.
Time since first public availability, on a six-month half-life.
Open weights. Downloadable weights are published under an OSI or free-culture license in the current repository metadata. This describes weight availability, not whether the full training stack qualifies as Open Source AI.
Metadata status: stale · HTTP 429.
Models within 3 places of #70 on the ModelCap Index.
The same publisher's other current models with a public Index position.
LongCat Flash Chat holds ModelCap Index position #70 of 189 ranked language models as of 12 September 2026, with an Index score of 53.8 (interval 45.2–62.3); evidence: modeled · peer benchmarks. The Index combines public benchmark boards with published uncertainty; the methodology page explains the weighting.
No live API price is listed for LongCat Flash Chat in the current snapshot as of 12 September 2026 because the latest endpoint refresh was unavailable. ModelCap shows a price only when a provider currently lists one.
Open weights (mit). Downloadable weights are published under an OSI or free-culture license in the current repository metadata. This describes weight availability, not whether the full training stack qualifies as Open Source AI. The repository is meituan-longcat/LongCat-Flash-Chat on Hugging Face.
LongCat Flash Chat's Index position rests on the evidence listed on this page; it has no result on the public boards ModelCap tracks as separate leaderboards as of 12 September 2026. The evidence panel names each source and its publication date.
LongCat Flash Chat ranks #70 (Index 53.8) and Qwen SEA LION v4.5 27B IT ranks #71 (Index 52.7) on the ModelCap Index as of 12 September 2026. The head-to-head page lines up their benchmarks, listed prices, context windows and provider counts side by side.
LongCat Flash Chat first appeared in the catalogue on 29 Aug 2025. It is the current version in its family. Rank and price movements since then are recorded on the site's changes feed.