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Claude Opus 4.5 vs Claude Opus 4.6

Claude Opus 4.6 leads in 3 of 8 categories

Arena ELO

Claude Opus 4.6

Cheaper

Tie

Faster

Claude Opus 4.6

Detailed Comparison

CategoryClaude Opus 4.5Claude Opus 4.6
ProviderAnthropic Anthropic
Context Window200K 1M WIN
Input Price ($/1M)$5 $5
Output Price ($/1M)$25 $25
Arena ELO1380 1549 WIN
Coding80.9% SWE-bench 80.8% SWE-bench
Reasoningunknown 65.4% Terminal-Bench
Speed (tokens/sec)~35 t/s ~40 t/s WIN
Open SourceNo No

Frequently Asked Questions

Which is cheaper, Claude Opus 4.5 or Claude Opus 4.6?

Claude Opus 4.6 is approximately 0% cheaper than Claude Opus 4.5 per million tokens.

Which is better for coding, Claude Opus 4.5 or Claude Opus 4.6?

Claude Opus 4.5 scores 80.9% SWE-bench on coding benchmarks, while Claude Opus 4.6 scores 80.8% SWE-bench.

Which has a larger context window?

Claude Opus 4.5 supports 200K context, while Claude Opus 4.6 supports 1M.

Is Claude Opus 4.5 or Claude Opus 4.6 open source?

Claude Opus 4.5 is proprietary. Claude Opus 4.6 is proprietary.

Which ranks higher on the Chatbot Arena leaderboard?

Claude Opus 4.6 ranks higher with ELO 1549 vs 1380.