Claude AI’s Opus 5 responses grow longer and more structurally complex compared to Fable 5

Anthropic's new Claude Opus 5 model offers performance comparable to its predecessor, Fable 5, but at a reduced cost. However, its tendency to generate longer, more detailed responses is a notable change for users.
Key takeaways
- Opus 5 delivers strong performance at a lower price point.
- Expect more verbose and complex AI-generated text.
- Prompting for brevity may become more important.
- Cost management requires attention to output length.
Why it matters
Users of AI assistants should be aware that Opus 5's detailed outputs might increase operational costs or require more careful prompt engineering for concise results. This impacts budget planning and the efficiency of AI tool integration.
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