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Index Ventures says it led Flapping Airplanes’ $1 billion Series A

Index Ventures says it led a $1 billion Series A for AI research startup Flapping Airplanes and took a board seat. The investment thesis centers on more efficient model training and inference, but the investor article does not disclose a valuation or establish a shipping product or independently measured efficiency result.

Flapping Airplanes

Series A financing

Funding & Deals

Published (date only)

Updated

1 source

Primary source · Flapping Airplanes · October 21, 2026

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