AI startup Ineffable Intelligence completes $1.1 billion seed round, valued at $5.1 billion

Golden Finance reports that on April 28th, the AI startup company Ineffable Intelligence, founded by former Google DeepMind core researcher David Silver, announced the completion of a seed round financing of up to $1.1 billion, setting the record for the largest seed investment in European history. The company was established at the end of 2025 and completed this round of funding just a few months after its founding, with a valuation of $5.1 billion. This round of investment was led jointly by Sequoia Capital and Lightspeed, with participating investors including NVIDIA, DST Global, Index Ventures, as well as Google and the UK Sovereign AI Fund. Ineffable Intelligence will focus on reinforcement learning technology, which enables AI to learn through its own experiences rather than relying on human-provided data for training. This approach contrasts with most mainstream AI models that are trained primarily on internet text and is seen as an important step toward more advanced artificial intelligence. (East New Agency)