What is the difference between Claude Opus 4.5 and Claude Opus 4.6?

Both are developed by Anthropic but target different use cases. in 371 community votes on Rival, Claude Opus 4.6 wins 68% of head-to-head matchups. These results are based on blind head-to-head voting across 53 challenges.

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

Based on 371 community votes on Rival, Claude Opus 4.6 wins 68% of head-to-head matchups against Claude Opus 4.5. Claude Opus 4.6 is strongest in Web Design, Image Generation, Reasoning.

How are Claude Opus 4.5 vs Claude Opus 4.6 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 371 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

Updated Feb 2026

Claude Opus 4.5vsClaude Opus 4.6

Claude Opus 4.6 wins 68% of 371 blind community votes against Claude Opus 4.5 on Rival.

Claude Opus 4.5 and Claude Opus 4.6 compared across 53 shared prompts
Spec	Claude Opus 4.5	Claude Opus 4.6
Win rate	32%	68%
Input price	—	$5/M tokens
Output price	—	$25/M tokens
Context window	—	1.0M tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	Nov 2025	Feb 2026
SWE-bench Verified	80.9%	80.8%