SN11 is a Starship Prototype similar in design to SN10 and SN9. It got destroyed during its first flight to an altitude of 10 km.
The SN11 Starship prototype performed a test flight similar to SN8, SN9 and SN10. It launched up to an altitude of 10 km or 33,000 ft and did a belly flop maneuver followed by a controlled descent, but got destroyed during the landing maneuver.
Suborbital SN11 - Maiden Flight SpaceX Starship Landing Pad