Rakuten launches open-weight LLM, claims beat GPT-4o
Rakuten Group has Unveiled Rakuten AI 3.0, a Japanese Large Language Model with around 700 Billion Parameters
It was developed as part of the government-supported Generative AI Accelerator Challenge project in Japan. The model uses a mixture of experts architecture and is now available across Rakuten’s services via its internal AI platform. Rakuten plans to release it as an open-weight model in spring 2026, or around March-May. Rakuten AI 3.0 achieved the highest score, 8.88, on the Japanese MT-Bench conversational benchmark, ahead of GPT-4o and other Japanese-focused LLMs.
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