The global lender said the agreement was expected to help unleash large-scale financing for Ukraine from international donors and partners, but gave no details.
IMF staff currently expected the change in Ukraine's real gross domestic product for 2023 to range from -3% to +1%, Gray added.
Ukrainian Prime Minister Denys Shmyhal hailed the agreement and thanked the IMF for its support.
If approved, as expected, the Ukraine program would be the IMF's biggest loan to a country involved in an active conflict.
The fund last week changed a rule to allow new loan programs for countries facing "exceptionally high uncertainty", without naming Ukraine.