Anthropic’s Two New Claude Models, Marshmallow and Melon, Leak in Early Access

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Anthropic’s latest Claude models, Marshmallow and Melon, have appeared in early access builds, according to on-chain data shared by developers. Testers found Marshmallow outperforms Melon but still lags behind Fable 5. Some users noted Marshmallow’s conversational quality surpasses Opus 5. The trend of food-themed names continues, following the earlier Honeycomb EAP. As the crypto market’s Fear & Greed Index remains volatile, these leaks suggest ongoing competition in the AI space.

Odaily Planet Daily report: Developers have discovered two early access versions of Anthropic’s Claude models, codenamed claude-marshmallow-eap and claude-melon-eap.

According to tester feedback, Marshmallow performs better overall than Melon, but neither has yet reached the level of Fable 5. Another tester noted that Marshmallow’s conversational experience is superior to Opus 5.

Previously, Anthropic had repeatedly released early models named with "food names + EAP." In early July, Claude Honeycomb EAP briefly appeared in Cursor before being removed; on July 24, Anthropic officially released Opus 5, but the company has never confirmed a direct correspondence between Honeycomb and Opus 5.

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