Fact

OpenAI — Valuation: $500 billion

OpenAI's

unverifiable85% confidence

1 evidence check

Last checked: 3/31/2026

The claim states OpenAI's valuation is $500B as of October 2025. The source discusses Microsoft's $135 billion stake (27% on diluted basis) and the nonprofit's $130 billion stake, but does not explicitly state a total company valuation of $500B. While one could potentially calculate a valuation from the 27% stake ($135B ÷ 0.27 ≈ $500B), the source does not directly confirm this total valuation figure. The source addresses the restructuring and stake percentages but does not explicitly state the overall company valuation, making the specific $500B claim unverifiable from this text alone.

Evidence — 1 source, 1 check

www.cnbc.com/2025/10/28/open-ai-for-profit-microsoft.html(1 check)

unverifiable85%primaryHaiku 4.5 · 3/31/2026

Found: The source states that Microsoft's investment in OpenAI Group PBC is valued at $135 billion (roughly 27% of the company on an as-converted diluted basis). The nonprofit OpenAI Foundation holds an equi…

Note: The claim states OpenAI's valuation is $500B as of October 2025. The source discusses Microsoft's $135 billion stake (27% on diluted basis) and the nonprofit's $130 billion stake, but does not explicitly state a total company valuation of $500B. While one could potentially calculate a valuation from the 27% stake ($135B ÷ 0.27 ≈ $500B), the source does not directly confirm this total valuation figure. The source addresses the restructuring and stake percentages but does not explicitly state the overall company valuation, making the specific $500B claim unverifiable from this text alone.

Debug info

Record type: fact

Record ID: f_YZ7zzKgBsA