Model Comparison
DeepSeek-V3 0324 vs LongCat-Flash-ChatWhich is better in 2026?
LongCat-Flash-Chat shows notably better performance in the majority of benchmarks. DeepSeek-V3 0324 is 1.1x cheaper per token.
Verdict: DeepSeek-V3 0324 vs LongCat-Flash-Chat — which is better?
DeepSeek-V3 0324 (by DeepSeek) and LongCat-Flash-Chat (by Meituan) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
DeepSeek-V3 0324 outperforms in 1 benchmarks (LiveCodeBench), while LongCat-Flash-Chat is better at 3 benchmarks (GPQA, MATH-500, MMLU-Pro). LongCat-Flash-Chat shows notably better performance in the majority of benchmarks.
On price, DeepSeek-V3 0324 is roughly 1.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
DeepSeek-V3 0324 also accepts a larger context window (163,840 input tokens), making it the stronger choice for long documents and large codebases.
Choose DeepSeek-V3 0324 if…
- cost matters — it's about 1.1x cheaper per token
- you process long inputs — it offers a 163,840 token context window
Choose LongCat-Flash-Chat if…
- you want the strongest raw capability — it leads on 3 of 4 shared benchmarks
- you want the most recent training data — it shipped Aug 2025
Performance Benchmarks
Comparative analysis across standard metrics
DeepSeek-V3 0324 outperforms in 1 benchmarks (LiveCodeBench), while LongCat-Flash-Chat is better at 3 benchmarks (GPQA, MATH-500, MMLU-Pro).
LongCat-Flash-Chat shows notably better performance in the majority of benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, DeepSeek-V3 0324 ($0.28/1M tokens) is 1.1x cheaper than LongCat-Flash-Chat ($0.30/1M tokens).
For output processing, DeepSeek-V3 0324 ($1.14/1M tokens) is 1.1x cheaper than LongCat-Flash-Chat ($1.20/1M tokens).
In conclusion, LongCat-Flash-Chat is more expensive than DeepSeek-V3 0324.*
* Using a 3:1 ratio of input to output tokens
Model Size
Parameter count comparison
DeepSeek-V3 0324 has 111.0B more parameters than LongCat-Flash-Chat, making it 19.8% larger.
Context Window
Maximum input and output token capacity
DeepSeek-V3 0324 accepts 163,840 input tokens compared to LongCat-Flash-Chat's 128,000 tokens. DeepSeek-V3 0324 can generate longer responses up to 163,840 tokens, while LongCat-Flash-Chat is limited to 128,000 tokens.
License
Usage and distribution terms
DeepSeek-V3 0324 is licensed under MIT + Model License (Commercial use allowed), while LongCat-Flash-Chat uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
MIT + Model License (Commercial use allowed)
Open weights
MIT
Open weights
Release Timeline
When each model was launched
DeepSeek-V3 0324 was released on 2025-03-25, while LongCat-Flash-Chat was released on 2025-08-29.
LongCat-Flash-Chat is 5 months newer than DeepSeek-V3 0324.
Mar 25, 2025
1.3 years ago
Aug 29, 2025
11 months ago
5mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
DeepSeek-V3 0324 is available from Novita. LongCat-Flash-Chat is available from Meituan.
DeepSeek-V3 0324
LongCat-Flash-Chat
Outputs Comparison
Key Takeaways
DeepSeek-V3 0324
View detailsDeepSeek
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against DeepSeek-V3 0324 and LongCat-Flash-Chat side-by-side, then vote on the output you prefer.
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FAQ
Common questions about DeepSeek-V3 0324 vs LongCat-Flash-Chat.