Anthropic
Previous Claude Opus 4.1 release retained for compatibility after later Opus upgrades. Still strong for reasoning, coding, and agentic tasks, but superseded by Claude Opus 4.7 for Anthropic's latest top-end capability.
Still strong for reasoning, coding, and agentic tasks, but superseded by Claude Opus 4.7 for Anthropic's latest top-end capability.
29.1
Quality Score
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Arena ELO
Undisclosed
Parameters
200K
Context
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
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Aug 2025
Released
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
Claude-Opus-4 - LiveCodeBench
LiveCodeBench pass@1 62.4 across 1055 tasks
View sourceClaude-Opus-4 - LiveCodeBench
LiveCodeBench pass@1 62.4 across 1055 tasks
View sourceIntroducing Claude 4
Skip to main content Skip to footer Research Economic Futures Commitments Learn News Try Claude Announcements Introducing Claude 4 May 22, 2025 Today, we’re introducing the next generation of Claude models: Claude Opus 4 and Claude Sonnet 4 , setting new standards for coding, advanced reasoning, and AI agents. Claude Opus 4 is the world’s best coding model, with sustained performance on complex, long-running tasks and agent workflows. Claude Sonnet 4 is a significant upgrade
View source