OpenAI · Series A

Creator of ChatGPT, GPT-4, and the leading frontier AI lab.

Amount

$10B

Round

Series A

Valuation

$100B

Announced

Jan 2024

Investors

Lead investor

M12 — Microsoft's Venture Fund

Notes

Microsoft multi-year, multi-billion extension

Other OpenAI rounds

Date	Round	Amount
Mar 2026	Series E	$122B	Details →
Oct 2025	Series B	$10.3B	Details →
Mar 2025	Series D	$40B	Details →
Jan 2023	Series C	$10B	Details →
Jan 2021	Series B	$1B	Details →
Jul 2019	Series A	$11M	Details →