Claude on X: "Introducing Claude Opus 5. It's a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price. https://t.co/GQWhcq2CQL" / X

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Claude
@claudeai
Introducing Claude Opus 5. It's a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price.
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4:59 PM · Jul 24, 202624MViews
Claude
@claudeai
Jul 24
On several coding and knowledge work evaluations, Opus 5 is the new state-of-the-art:
Claude
@claudeai
Jul 24
Opus 5 is also highly efficient. It outperforms other models for a similar or lower cost per task:
Claude
@claudeai
Jul 24
On ARC-AGI-3, an evaluation where AI models must solve novel problems, Opus 5’s score is three times as high as the next best model.
Claude
@claudeai
Jul 24
According to our automated behavioral audit, Opus 5 is our most aligned model to date. Compared to our other models, it shows the lowest rates of reckless or deceptive behavior, and the strongest adherence to Claude’s Constitution.
Claude
@claudeai
Jul 24
Opus 5 is stronger than Opus 4.8 on cybersecurity tasks. But it remains substantially behind Mythos 5 at developing exploits. Its safeguards are designed to allow developers to identify and fix software vulnerabilities, while blocking high-risk uses.
Claude
@claudeai
Jul 24
Opus 5 is available today on all paid plans and the Claude API, priced the same as Opus 4.8. It’s the default model on Claude Max, and the strongest on Claude Pro. It’s also offered in Fast mode, which runs around 2.5× the default speed. Read more:
Introducing Claude Opus 5
From anthropic.com
Sam L
@samell
Jul 24
can't wait for the “99% of people are using Opus 5 wrong” articles tomorrow
GIF