Benchmarks of LongCat Flash Chat17
BenchmarkByScoreRank
No benchmark matches
—per task?
self-host onlyprice
—output speed?
131Kcontext
Ranking?
Alternatives?
ModelScoreCostPer taskWhat changes
BetterGPT-5.6 Solxhighwins 53%—$1.18
OpenMiMo v2.6 Prounstatedwins 59%—$0.43 / $0.87Memory (4-bit): 337 GB → 615 GB+4
BetterGLM 5.2maxOpenwins 55%—$1.28Memory (4-bit): 337 GB → 452 GB
BetterMuse Spark 1.2xhighwins 56%—$1.29Only auto tool_choice is supported+1BetterGPT-5.5highwins 54%—$1.40Prompts with >272K input tokensModelScoreCostPer taskWhat changes
Nothing here yet.
ModelScoreCostPer taskWhat changes
GPT-5.6 Solxhighwins 53%—$1.18GLM 5.2maxOpenwins 55%—$1.28Memory (4-bit): 337 GB → 452 GBMuse Spark 1.2xhighwins 56%—$1.29Only auto tool_choice is supported+1GPT-5.5highwins 54%—$1.40Prompts with >272K input tokens
Gemini 3.6 Flashhighwins 56%—*$1.60ModelScoreCostPer taskWhat changes
MiMo v2.6 ProunstatedOpenwins 59%—$0.43 / $0.87Memory (4-bit): 337 GB → 615 GB+4GLM 5.3maxOpenwins 56%—$2.01Memory (4-bit): 337 GB → 452 GB+4MiMo v2.5 ProunstatedOpenwins 55%—$0.43 / $0.87Memory (4-bit): 337 GB → 614 GBGLM 5.1unstatedOpenwins 55%—$1.40 / $4.40Memory (4-bit): 337 GB → 452 GBGLM 5.2maxOpenwins 55%—$1.28Memory (4-bit): 337 GB → 452 GBRun it yourself
estimateFits on✗ 8 GB (phone, laptop)✗ 16 GB✗ 24 GB GPU✗ 48 GB GPU✗ 80 GB GPU
LicenceMITfree for commercial use
Benchmarks
all categoriesChat & Knowledge
Arena Text · overall1,401#98
Arena Text · Chinese1,448.2#82
Arena Text · English1,439.4#67
Arena Text · French1,456#52
Arena Text · German1,407.7#74
Arena Text · instruction following1,397.8#89
Arena Text · Japanese1,332.8#86
Arena Text · Korean1,357.9#82
Arena Text · non-English1,403.6#80
Arena Text · Polish1,405.4#73
Arena Text · Russian1,395.6#92
Arena Text · Spanish1,445#52
MMLU-Pro · official boardlab82.7
Arena Text · overall · October 22, 20261,422.7#74
Arena Text · overall · October 15, 20261,422.6#71
Writing & Language
Arena Text · creative writing1,329#113
FAQ
How much does LongCat Flash Chat cost?›
There is no per-unit API price: self-host only.
Is LongCat Flash Chat free to use?›
There is no free API. The weights are open, so you can run it yourself.
How good is LongCat Flash Chat, and what is it best at?›
#67 of 205 in Chat & Knowledge, #99 of 197 in Writing & Language.
Is LongCat Flash Chat better than Mistral Large 3?›
On Arena Text · English, LongCat Flash Chat scores 1,439.4 vs 1,439.6 — about the same.
What is the context window of LongCat Flash Chat?›
131K tokens.
When was LongCat Flash Chat released? Is there a newer version?›
Released 2025-08-29. It is the current version in its line.
Is LongCat Flash Chat open source?›
Yes, the weights are open (MIT licence).
Can I run LongCat Flash Chat locally?›
The weights are open and can be self-hosted; hardware needs are not confirmed yet.
Can LongCat Flash Chat read images?›
No, it accepts text only.
What is LongCat Flash Chat?›
LongCat Flash Chat is an open-weights language model from meituan-longcat, released Aug 2025.
What are the best alternatives to LongCat Flash Chat?›
GPT-5.6 Sol (better), MiMo v2.6 Pro (open weights).