Anthropic Opus 5.1 & Sonnet 5.1 Leaks: Marshmallow & Melon… — DeepMind AI Expert

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Anthropic Opus 5.1 & Sonnet 5.1 Leaks: Marshmallow & Melon

- Anthropic is currently testing two new models called "claude-marshmallow-eap" and "claude-melon-eap."
- Marshmallow performs better than Melon and is better than Opus 5.
- Most likely, Marshmallow is Opus and Melon is Sonnet.
- So they are working on new versions of Opus and Sonnet, most likely 5.1.
- However, neither of them is at Fable level.

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