How much does LongCat Flash Chat cost?

LongCat Flash Chat costs $0.20 per million input tokens and $0.80 per million output tokens. For a typical conversation (~2,000 tokens), that's approximately $0.001 per message.

What benchmarks has LongCat Flash Chat been tested on?

LongCat Flash Chat has been evaluated on 7 benchmarks. Top scores: Chatbot Arena Elo — Overall: 1401.1, OpenCompass — IFEval: 90.2, OpenCompass — MMLU-Pro: 81.0.

Is LongCat Flash Chat open source?

Yes, LongCat Flash Chat is open source.

How does LongCat Flash Chat compare to DeepSeek V3.1?

LongCat Flash Chat has an average score of 53.4 while DeepSeek V3.1 scores 53.4. DeepSeek V3.1 slightly outperforms LongCat Flash Chat overall. LongCat Flash Chat costs $0.20/1M input vs DeepSeek V3.1 at $0.15/1M input. See full comparison →

Home/Models/LongCat Flash Chat

LongCat Flash Chat

Name: LongCat Flash Chat
Price: 0.2 USD
Author: meituan

by meituan · Released Sep 2025

Open Source

53.4

avg score

Rank #95

Compare

Better than 59% of all models

Context

131K tokens (~66 books)

Input $/1M

$0.20

Output $/1M

$0.80

Type

text

License

Open Source

Benchmarks

7 tested

Data updated today

About

LongCat-Flash-Chat is a large-scale Mixture-of-Experts (MoE) model with 560B total parameters, of which 18.6B–31.3B (≈27B on average) are dynamically activated per input. It introduces a shortcut-connected MoE design to reduce...

Tested on 7 benchmarks with 59.8% average. Top scores: Chatbot Arena Elo — Overall (1401.1%), OpenCompass — IFEval (90.2%), OpenCompass — MMLU-Pro (81.0%).

Looking for similar performance at lower cost?
Phi 4 scores 54.2 (101% as good) at $0.07/1M input · 68% cheaper

Capabilities

coding

48.2

#74 globally

math

61.0

#47 globally

knowledge

53.2

#83 globally

language

90.2

#11 globally

Benchmark Scores

Compare All

Tested on 7 benchmarks · Ranked across 5 categories

Score Distribution (all 233 models)

0255075100

▲ You are here

codingCompare coding →

OpenCompass — LiveCodeBenchV6

OpenCompass Live Code Bench v6. Fresh competitive programming problems to evaluate code generation without memorization.

48.2—

mathCompare math →

OpenCompass — AIME2025

OpenCompass evaluation on AIME 2025 problems. Tests mathematical reasoning on fresh competition problems.

61.0—

knowledgeCompare knowledge →

OpenCompass — MMLU-Pro

OpenCompass MMLU-Pro evaluation. Harder knowledge test with more answer choices.

81.0—

OpenCompass — GPQA-Diamond

OpenCompass evaluation of GPQA Diamond. PhD-level science questions from the hardest subset.

70.1—

OpenCompass — HLE

OpenCompass evaluation of Humanitys Last Exam. Expert-level cross-discipline knowledge test.

8.5—

Quick compare:

vs DeepSeek V3.1

vs Grok 3 Mini Beta

vs GPT-5 Pro

Excellent (85+) Good (70-85) Average (50-70) Below (<50)

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longcat-flash-chat

Specifications

Typetext
Context131K tokens (~66 books)
ReleasedSep 2025
LicenseOpen Source
StatusActive
Cost / Message~$0.001

Available On

meituan$0.20

Frequently Asked Questions

LongCat Flash Chat is an open-source text AI model by meituan, released in September 2025. It has an average benchmark score of 53.4. Context window: 131K tokens.

Benchmarks

Chatbot Arena Elo — Overall OpenCompass — IFEval OpenCompass — MMLU-Pro OpenCompass — GPQA-Diamond OpenCompass — AIME2025

meituan · Provider meituan · Economy All Models Compare Models Pricing Developers · API Context Window · Glossary

LongCat Flash Chat

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