Arena AI Platform Raises $200M Series B at $3.1B Valuation
Arena, an AI model evaluation platform that originated as a UC Berkeley research project in 2023, has raised a $200 million Series B round at a valuation of $3.1 billion. This follows the company's announcement earlier this year that it had reached $100 million in annualized run-rate revenue. The funding was led by Lightspeed Venture Partners and Khosla Ventures, with participation from Salesforce Ventures, Dell Technologies Capital, and other notable investors. Previously valued at $1.7 billion after a January 2024 Series A round, Arena's valuation has nearly doubled in about ten months as it continues to grow its user base of tens of millions monthly visitors. The company offers both free consumer access for model comparisons and commercial services like AI Evaluations, which provides performance analytics based on community feedback. The platform recently introduced a new category called 'alignment' that evaluates models on safety-related criteria such as unauthorized actions and deceptive completions. OpenAI's models currently lead this leaderboard.
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