Qwen3.5-397B-A17B vs LongCat-Flash-Thinking-2601 Comparison
Comparing Qwen3.5-397B-A17B and LongCat-Flash-Thinking-2601 across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
Qwen3.5-397B-A17B outperforms in 6 benchmarks (BrowseComp, BrowseComp-zh, GPQA, Humanity's Last Exam, IMO-AnswerBench, SWE-Bench Verified), while LongCat-Flash-Thinking-2601 is better at 0 benchmarks.
Qwen3.5-397B-A17B significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Qwen3.5-397B-A17B ($0.60/1M tokens) is 2.0x more expensive than LongCat-Flash-Thinking-2601 ($0.30/1M tokens).
For output processing, Qwen3.5-397B-A17B ($3.60/1M tokens) is 3.0x more expensive than LongCat-Flash-Thinking-2601 ($1.20/1M tokens).
In conclusion, Qwen3.5-397B-A17B is more expensive than LongCat-Flash-Thinking-2601.*
* Using a 3:1 ratio of input to output tokens
Model Size
Parameter count comparison
LongCat-Flash-Thinking-2601 has 163.0B more parameters than Qwen3.5-397B-A17B, making it 41.1% larger.
Context Window
Maximum input and output token capacity
Qwen3.5-397B-A17B accepts 262,144 input tokens compared to LongCat-Flash-Thinking-2601's 128,000 tokens. LongCat-Flash-Thinking-2601 can generate longer responses up to 128,000 tokens, while Qwen3.5-397B-A17B is limited to 64,000 tokens.
Input Capabilities
Supported data types and modalities
Qwen3.5-397B-A17B supports multimodal inputs, whereas LongCat-Flash-Thinking-2601 does not.
Qwen3.5-397B-A17B can handle both text and other forms of data like images, making it suitable for multimodal applications.
Qwen3.5-397B-A17B
LongCat-Flash-Thinking-2601
License
Usage and distribution terms
Qwen3.5-397B-A17B is licensed under Apache 2.0, while LongCat-Flash-Thinking-2601 uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Apache 2.0
Open weights
MIT
Open weights
Release Timeline
When each model was launched
Qwen3.5-397B-A17B was released on 2026-02-16, while LongCat-Flash-Thinking-2601 was released on 2026-01-14.
Qwen3.5-397B-A17B is 1 month newer than LongCat-Flash-Thinking-2601.
Feb 16, 2026
4 weeks ago
1mo newerJan 14, 2026
2 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
Qwen3.5-397B-A17B is available from Novita. LongCat-Flash-Thinking-2601 is available from Meituan. The availability of providers can affect quality of the model and reliability.
Qwen3.5-397B-A17B
LongCat-Flash-Thinking-2601
Outputs Comparison
Key Takeaways
Qwen3.5-397B-A17B
View detailsAlibaba Cloud / Qwen Team
Detailed Comparison
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