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AI leaderboard Arena completes $200 million Series B funding at a $3.1 billion valuation
AI model crowdsourced leaderboard Arena announced the completion of a $200 million Series B funding round at a $3.1 billion valuation, led by Lightspeed Venture Partners and Khosla Ventures, with participation from Salesforce Ventures, 01 Advisors, Dell Technologies Capital, Endeavor Catalyst, a16z, Felicis, and others. The company said its annualized revenue reached $100 million in June, while at the time of its Series A funding in January it was valued at $1.7 billion with $30 million in annualized revenue, meaning its valuation nearly doubled in about ten months. Arena also added an alignment category to its leaderboard, ranking models by issues such as unauthorized actions, misattribution, and falsely completing tasks; currently multiple OpenAI models occupy the top of the preliminary alignment leaderboard, with Claude Opus 5.5 and Claude Fable ranked sixth and ninth, respectively.
at the time of its Series A funding in January it was valued at $1.7 billion with $30 million in annualized revenue, meaning its valuation nearly doubled in about ten months. Arena also added an alignment category to its leaderboard, ranking models by issues such as unauthorized actions, misattribution, and falsely completing tasks; currently multiple OpenAI models occupy the top of the preliminary alignment leaderboard, with Claude Opus 5.5 and Claude Fable ranked sixth and ninth, respectively.
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US Department of Defense Officially Stops Using Anthropic's AI Tools
A US Department of Defense official told the BBC that the Pentagon has stopped using Anthropic's products. Defense Secretary Hegseth in February of this year designated Anthropic as a supply chain risk on national security grounds and announced that its products would be discontinued by late August, but multiple people familiar with the matter said that until last week the department was still using the Claude model in research, intelligence gathering, and military operations against Iran. Anthropic said this designation is unprecedented and illegal, and has sued the Trump administration; during the same period, the Pentagon signed contracts with companies including Google, xAI, and OpenAI.
sk on national security grounds and announced that its products would be discontinued by late August, but multiple people familiar with the matter said that until last week the department was still using the Claude model in research, intelligence gathering, and military operations against Iran. Anthropic said this designation is unprecedented and illegal, and has sued the Trump administration; during the same period, the Pentagon signed contracts with companies including Google, xAI, and OpenAI.
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Microsoft launches biological world model Quine, multiple giants double down on AI4S
Microsoft Research has launched an experimental AI research system, Quine, building a biological multimodal world model covering genomics, proteins, chemistry, RNA, cell states, and biological imaging, and constructing an interactive harness framework that connects models, scientific tools, literature, and researchers. Microsoft has partnered with the Broad Institute, jointly established by MIT and Harvard University, to apply Quine to cancer biology research. In one case, it completed the predictive ranking of the effects of thousands of compounds on pancreatic cancer cell states over a single weekend, saving months of experimental work, but the system is still in an early research stage. In addition, Anthropic established a life sciences research team and laboratory on September 23, OpenAI launched GPT-Rosalind for life sciences in April this year, and Nvidia announced in January this year a joint effort with Eli Lilly to build an AI innovation laboratory.
case, it completed the predictive ranking of the effects of thousands of compounds on pancreatic cancer cell states over a single weekend, saving months of experimental work, but the system is still in an early research stage. In addition, Anthropic established a life sciences research team and laboratory on September 23, OpenAI launched GPT-Rosalind for life sciences in April this year, and Nvidia announced in January this year a joint effort with Eli Lilly to build an AI innovation laboratory.
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