CapitalG leads OpenRouter's $113M Series B with a16z, NVentures, Menlo

Why it matters

Routing across many frontier and domain models is becoming table stakes for production AI. Funding and strategic backers signal that model orchestration is solidifying as core infra.

OpenRouter raised a $113M Series B led by Google's CapitalG (@CapitalG), with participation from a16z (@a16z), Menlo Ventures (@MenloVentures), NVentures (Nvidia's venture arm, @nvidia), ServiceNow Ventures, MongoDB Ventures, Snowflake Ventures, and Databricks Ventures, the company said in a thread on X.

The New York Times reported the round values OpenRouter at about $1.3 billion, citing a person with knowledge of the terms. The Times also noted OpenRouter describes itself as a marketplace for AI models and a gateway that helps companies avoid lock-in.

OpenRouter said weekly volume on its platform grew from 5T to 25T tokens over the last six months, framing demand shifting from experimentation to production in the thread. Speaking to the Times, CEO Alex Atallah said, "A lot of what we do is try to help people find the right vendor for the job," and warned that if companies are not careful, running queries through AI models "could end up leading to an infinite cost center." The Times added that OpenRouter says it now processes 25 trillion tokens every week, up from five trillion six months ago.

On model breadth and usage, the Times reported that while many know offerings from OpenAI, Anthropic, and Google, OpenRouter says it provides access to more than 400 models, with some optimized for heavy-duty reasoning and others for speed. Over the past week, the most popular models among OpenRouter customers were open-source options from DeepSeek and Tencent, followed by Anthropic's high-end Claude 4.7 Opus, according to the Times.

CapitalG partners Jane Alexander and Mo Jomaa told the Times they were drawn to OpenRouter's role as a gateway to models. Jomaa said OpenRouter's rising popularity gives it an edge in learning what customers want and steering them to the best options. Atallah added that OpenRouter had not been looking to raise money until CapitalG sent what he called a "reverse pitch deck," which quickly catalyzed the round.

OpenRouter framed the capital around scaling its core focus on model choice and orchestration, writing that it is "building infrastructure for the multi-model AI era" in the thread. A follow-up post corrected an earlier tag to note CapitalG among the backers here.

The roster of corporate venture arms from enterprise and data platforms alongside established venture firms highlights growing production demand for model routing and access infrastructure, as teams move from single-model experiments to multi-model deployments.