Anthropic raises $450 million in Series C

Summary

Anthropic announces a $450 million Series C funding round led by Spark Capital, with participation from Google, Salesforce Ventures, Sound Ventures, Zoom Ventures, and others. The funding is intended to support development of helpful, harmless, and honest AI systems, including Claude, and to expand product offerings, support for businesses deploying Claude, AI safety research, and the company’s product and research teams. Anthropic says its alignment work targets adversarial conversations, precise instruction following, and greater transparency about system behavior and limitations. Planned product work includes 100K context windows for submitting hundreds of pages of material to Claude, along with further improvements to its API and chat products. Yasmin Razavi, a Spark Capital general partner, joined Anthropic’s board, while the company continues refining its governance structure around its Public Benefit orientation.

Takeaways

1. 1

   The $450 million Series C was led by Spark Capital, with Google, Salesforce Ventures, Sound Ventures, Zoom Ventures, and others participating.

2. 2

   Anthropic’s alignment work focuses on handling adversarial conversations, following precise instructions, and making AI behavior and limitations more transparent.

3. 3

   The company is building 100K context windows that can accept hundreds of pages of material for Claude to digest and analyze.