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Claude Sonnet 4.6 vs LongCat-2.0

Claude Sonnet 4.6 leads in 5 of 8 categories

Arena ELO

Claude Sonnet 4.6

Cheaper

Claude Sonnet 4.6

Faster

Claude Sonnet 4.6

Detailed Comparison

CategoryClaude Sonnet 4.6LongCat-2.0
ProviderAnthropic Meituan
Context Window1M WIN128K
Input Price ($/1M)$3 WINN/A
Output Price ($/1M)$15 WINN/A
Arena ELO1440 WINN/A
Coding79.6% SWE-bench N/A
Reasoning72.5% OSWorld N/A
Speed (tokens/sec)~80 t/s WINN/A
Open SourceNo Yes

Frequently Asked Questions

Which is better for coding, Claude Sonnet 4.6 or LongCat-2.0?

Claude Sonnet 4.6 scores 79.6% SWE-bench on coding benchmarks, while LongCat-2.0 scores N/A.

Which has a larger context window?

Claude Sonnet 4.6 supports 1M context, while LongCat-2.0 supports 128K.

Is Claude Sonnet 4.6 or LongCat-2.0 open source?

Claude Sonnet 4.6 is proprietary. LongCat-2.0 is open source.

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