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

Anthropic released Claude Opus 5 on July 24, 2026, with responses significantly longer and more structurally complex than its predecessor Opus 4.8, while Fable 5, the premium-tier model, remains concise. Opus 5 maintains the same API rate as Opus 4.8 at $5 per million input tokens and $25 per million output tokens, roughly half the cost of Fable 5, and now serves as the default model on Claude Max and the strongest model on Claude Pro.

Via tomshardware.com Claude AI’s Opus 5 responses grow longer and more structurally complex compared to Fable 5 Anthropic's latest flagship model delivers near-Fable 5 performance at half the cost, but its verbosity is turning heads for different reasons Anthropic released Claude Opus 5 on July 24, 2026, and users immediately noticed something: it talks a lot more than its predecessor. Responses from the new model are significantly longer, more detailed, and more structurally complex than what Opus 4.8 produced. Meanwhile, Fable 5, the company’s premium-tier model released earlier this year, keeps things tight and occasionally throws in a compliment for good measure. What Opus 5 actually brings to the table The new model ships with a 1 million token context window and a maximum output token capacity of 128,000 tokens. On the pricing front, Anthropic kept things simple. Opus 5 maintains the same API rate as Opus 4.8: $5 per million input tokens and $25 per million output tokens. That’s roughly half what Fable 5 costs, while delivering performance that closely rivals the top-tier model. Opus 5 now serves as the default model on Claude Max and stands as the strongest model available on Claude Pro. It also comes with a Fast mode option for users who need quicker turnaround. The model’s tendency toward verbosity means users must explicitly prompt for brevity, a notable behavioral shift from Opus 4.8. Fable 5: the quiet counterpart Users have described Fable 5’s style as carrying a “quiet confidence,” delivering concise responses that often include praise or validation alongside the actual answer. One tension to monitor: verbosity has costs, both literal and practical. Longer responses mean more output tokens consumed, which means higher bills for API users even at the same per-token price. Anthropic’s decision to require explicit prompting for conciseness puts the burden on users to manage that tradeoff. Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy https://cryptobriefing.com/editorial-policy/ .