Model Comparison
Kimi K3 vs LongCat-Flash-ChatWhich is better in 2026?
Kimi K3 significantly outperforms across most benchmarks. LongCat-Flash-Chat is 11.4x cheaper per token.
Verdict: Kimi K3 vs LongCat-Flash-Chat — which is better?
Kimi K3 (by Moonshot AI) 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.
Kimi K3 outperforms in 1 benchmarks (GPQA), while LongCat-Flash-Chat is better at 0 benchmarks. Kimi K3 significantly outperforms across most benchmarks.
On price, LongCat-Flash-Chat is roughly 11.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Kimi K3 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Choose Kimi K3 if…
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Jul 2026
Choose LongCat-Flash-Chat if…
- cost matters — it's about 11.4x cheaper per token
- you need open weights you can self-host or fine-tune
Performance Benchmarks
Comparative analysis across standard metrics
Kimi K3 outperforms in 1 benchmarks (GPQA), while LongCat-Flash-Chat is better at 0 benchmarks.
Kimi K3 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Kimi K3 ($3.00/1M tokens) is 10.0x more expensive than LongCat-Flash-Chat ($0.30/1M tokens).
For output processing, Kimi K3 ($15.00/1M tokens) is 12.5x more expensive than LongCat-Flash-Chat ($1.20/1M tokens).
In conclusion, Kimi K3 is more expensive than LongCat-Flash-Chat.*
* Using a 3:1 ratio of input to output tokens
Model Size
Parameter count comparison
Kimi K3 has 2240.0B more parameters than LongCat-Flash-Chat, making it 400.0% larger.
Context Window
Maximum input and output token capacity
Kimi K3 accepts 1,048,576 input tokens compared to LongCat-Flash-Chat's 128,000 tokens. Kimi K3 can generate longer responses up to 1,048,576 tokens, while LongCat-Flash-Chat is limited to 128,000 tokens.
Input Capabilities
Supported data types and modalities
Kimi K3 supports multimodal inputs, whereas LongCat-Flash-Chat does not.
Kimi K3 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Kimi K3
LongCat-Flash-Chat
Release Timeline
When each model was launched
Kimi K3 was released on 2026-07-16, while LongCat-Flash-Chat was released on 2025-08-29.
Kimi K3 is 11 months newer than LongCat-Flash-Chat.
Jul 16, 2026
5 days ago
10mo newerAug 29, 2025
10 months ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Kimi K3 is available from Moonshot AI. LongCat-Flash-Chat is available from Meituan.
Kimi K3
LongCat-Flash-Chat
Outputs Comparison
Key Takeaways
Kimi K3
View detailsMoonshot AI
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Kimi K3 and LongCat-Flash-Chat side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Kimi K3 vs LongCat-Flash-Chat.