Anthropic's New 'Fennec' Claude Model Reportedly Beats Opus 4.5 on Coding

A new Claude model codenamed 'Fennec,' believed to be a Sonnet refresh, is outperforming Anthropic's own Opus 4.5 on coding benchmarks — suggesting the company's smaller models are catching up to its flagships.

Anthropic appears to have quietly updated its Claude model lineup with a new variant codenamed "Fennec" that is outperforming Opus 4.5 on coding tasks, according to @AiBattle_. The model is believed to be a refresh of the Sonnet tier — Anthropic's mid-range offering — which would make the result particularly significant: a cheaper, faster model beating the company's own top-of-the-line product.

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