Anthropic joins Frontier carbon removal coalition with $915 million（約1500億円） pledge, becoming the first pure AI startup in the group and nearly doubling the collective's total funding to $1.8 billion（約2900億円）.

What happened: Anthropic has joined Frontier, a carbon removal collective founded by tech companies including Stripe, Google, and Shopify. Anthropic's contribution of $915 million（約1500億円） in new funding brings Frontier's total pledges to $1.8 billion（約2900億円）. So far, Frontier has contracted nearly $700 million（約1100億円） across more than 50 projects to remove 1.8 million tons of carbon.

Why it matters: Anthropic is the first pure AI company to join Frontier, signaling a shift in how AI companies approach climate commitments. The move is notable because AI companies have been on an energy buying spree, and Anthropic has previously favored an "all of the above" approach to energy sourcing. This is Anthropic's first climate-related deal, and the company has not yet produced a sustainability report.

What to watch: Frontier announced that future funding will come with higher scrutiny, focusing on fewer projects with the best chance at removing a gigaton—1 billion metric tons—of CO₂ or more annually. New contracts will run around eight to ten years.