Leak: Anthropic Testing New Models 'Marshmallow' and 'Melon', Marshmallow Beats Opus 5 in Chat

davidad · x · 2026-08-24

According to a leak, Anthropic is testing two new models: claude-marshmallow-eap and claude-melon-eap. Marshmallow outperforms Melon and is better at conversation than Opus 5, but neither reaches Fable level.

Related event: Anthropic's Marshmallow and Melon Model Codenames Surface Ahead of Possible Release(6 posts)→

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