state of the art

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The highest level of development, as of a device, technique, or scientific field, achieved at a particular time.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective At the highest level of development at a particular time; cutting-edge.
• noun The condition of scientific or technical knowledge, particularly the peak or highest level thereof, at a particular time.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the highest degree of development of an art or technique at a particular time