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Claude Opus 5 vs Claude Sonnet 4.6

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 Opus 5Claude Sonnet 4.6
ProviderAnthropic Anthropic
Context Window200K 1M WIN
Input Price ($/1M)$15 $2 WIN
Output Price ($/1M)$75 $12 WIN
Arena ELON/A 1440 WIN
CodingN/A 79.6% SWE-bench
ReasoningN/A 72.5% OSWorld
Speed (tokens/sec)N/A ~80 t/s WIN
Open SourceNo No

Frequently Asked Questions

Which is cheaper, Claude Opus 5 or Claude Sonnet 4.6?

Claude Sonnet 4.6 is approximately 84% cheaper than Claude Opus 5 per million tokens.

Which is better for coding, Claude Opus 5 or Claude Sonnet 4.6?

Claude Opus 5 scores N/A on coding benchmarks, while Claude Sonnet 4.6 scores 79.6% SWE-bench.

Which has a larger context window?

Claude Opus 5 supports 200K context, while Claude Sonnet 4.6 supports 1M.

Is Claude Opus 5 or Claude Sonnet 4.6 open source?

Claude Opus 5 is proprietary. Claude Sonnet 4.6 is proprietary.

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