On February 5, 2026, San Francisco-based artificial intelligence company Goodfire (goodfire.ai) announced the completion of a $150 million Series B funding round, valuing the company at $1.25 billion. This funding will support its efforts to deepen its research in fundamental AI science, addressing the fundamental challenge of interpretability in AI models.
Previous Funding History:
April 2025: Completed a $50 million ($50M) Series A funding round.
2024: $7 million seed round.
Goodfire believes that the AI industry is currently at a critical turning point where fundamental science supports its development. Just as the steam engine preceded thermodynamics and plant breeding preceded genetics, the large-scale development of AI urgently requires the support of underlying scientific theories. Its core goal is to build a fundamental scientific system for AI, enabling AI models to shed their “black box” nature and become understandable, debuggable, and customizable like traditional software.
Currently, Goodfire has assembled a world-class R&D team, developing cutting-edge AI interpretability technologies and methods. It has also achieved cross-disciplinary scientific breakthroughs, discovering a new type of Alzheimer’s disease biomarker and collaborating with leading companies in the industry. This round of financing will further promote the application of its technology and scientific research, helping the team to continuously push the boundaries of fundamental AI science.
In the current era of large-scale AI development, Goodfire’s choice to return to a fundamental scientific research path provides new ideas for industry development and brings more possibilities for solving the underlying scientific challenges of AI development.
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