Overview

• Indian defense sources say New Delhi is evaluating additional S-400 units under a follow-on clause and is also studying a potential S-500 purchase, with no new contract signed.
• The 2018 deal for five S-400 battalions, valued at about $5.43 billion, includes an option to buy up to five more on comparable terms adjusted for inflation and exchange rates.
• Officials point to the S-400’s performance in May’s Operation Sindoor as a key driver, with the IAF chief crediting the system for long‑range intercepts at roughly 300 kilometers.
• A senior Russian diplomat says all options are under consideration in India and describes an advanced dialogue, while indicating the next S-400 deliveries are expected by late 2026.
• Russian statements present the S-500 as capable against ballistic and hypersonic threats with anti‑satellite roles, following reported 2021 trials, and India’s interest predates today’s talks.