Lee Konitz was born October 13, 1927, in Chicago, to Jewish immigrant parents Abraham Konitz and Anna Getlin. He came to music, and to the saxophone, sideways: at eleven, inspired by Benny Goodman, he was given a clarinet and studied under Lou Honig; a year later, hearing Lester Young, he switched to tenor saxophone before settling on alto in his mid-teens, studying with Santy Runyon, a Chicago teacher whose studio also produced Sonny Stitt and Paul Desmond. He briefly attended Roosevelt University in Chicago before prioritizing playing over classwork, drawing his earliest influences from Johnny Hodges, Roy Eldridge, and Louis Armstrong. He turned professional in 1945 with the Teddy Powell band and worked intermittently with Jerry Wald, and in 1946 he met the blind pianist and theorist Lennie Tristano — the single most formative relationship of his musical life. Tristano was building an entire pedagogy around counterpoint, harmonic freedom, and what he called "pure improvisation," rigorous enough that a small circle of disciples, Konitz and tenor saxophonist Warne Marsh chief among them, absorbed it as something closer to a musical philosophy than a set of licks. In 1947 Konitz joined bandleader Claude Thornhill's orchestra, where arranger Gil Evans and composer-arranger Gerry Mulligan were also on the roster — the room where the ideas behind what became "cool jazz" were first being sketched out.

That Thornhill connection led directly to the project Konitz is most identified with. Trumpeter Miles Davis, drawing on Evans's and Mulligan's arranging ideas and Thornhill's unusually cushioned, French-horn-and-tuba-inflected sonority, assembled a nonet for a short 1948 Royal Roost engagement and a pair of 1949-50 studio sessions, eventually compiled by Capitol as Birth of the Cool in 1957. Konitz was the alto voice in that group, and it remains the recording most responsible for cementing "cool" as a distinct strain of jazz separate from the harder-edged bebop coming out of 52nd Street. Davis later wrote in his autobiography that he'd hire Konitz "every time" if a player could match what he heard in that sound. In the same stretch, Konitz recorded with the Tristano Sextet on "Intuition" and "Digression" (1949) — fully collective, chordless free improvisations that predate the term "free jazz" by roughly a decade, an experiment few of Konitz's bebop-generation peers were making at all. His own debut as a leader, the sessions later gathered as Subconscious-Lee (Prestige, 1955), came out of these same 1949-50 dates.

What set Konitz apart across the 1950s wasn't just the Tristano pedigree; it was that he simply didn't sound like Charlie Parker, at a moment when almost every young alto player in America did. Reviewers and later historians returned to this point again and again: Konitz's tone was drier and lighter than the bebop mainstream's, his phrasing more horizontal and legato than Parker's blues-rooted attack, and his harmonic instincts ran through Tristano's counterpoint rather than through Parker's vocabulary. He toured and recorded with Stan Kenton's orchestra in the early 1950s, sat in on Gerry Mulligan's pianoless quartet sessions in 1953 (a rare recorded meeting of two founding cool-jazz voices), and built a long, close creative partnership with Warne Marsh, formalized on the 1955 Atlantic session Lee Konitz with Warne Marsh — two saxophonists trained in the same harmonic language playing genuinely contrapuntal, unrehearsed duets rather than trading solos. By 1961's trio session Motion (Verve, with Sonny Dallas and Elvin Jones, and no chordal instrument at all), Konitz had a claim to one of the most distinctive small-group sounds in jazz.

The 1960s brought a real interruption — by his own and biographers' accounts, Konitz stepped back from music for a period early in the decade before returning to performing and, increasingly, teaching, both in the U.S. and internationally. The comeback proved durable: 1967's The Lee Konitz Duets paired him individually with eight very different partners (Jim Hall, Joe Henderson, Eddie Gomez, and others) across a single record, and 1968's Alto Summit — a rare four-alto-saxophone session with Phil Woods, Leo Wright, and Pony Poindexter, cut at MPS's Black Forest studio with a young Palle Danielsson on bass — showed Konitz comfortable holding his own identity inside a crowded reed section. Through the 1970s he moved further outward, playing free improvisation with figures including Anthony Braxton, Derek Bailey, and Andrew Hill, leading nonets that echoed the Birth of the Cool instrumentation, and touring with a rotating cast of European and American rhythm sections — a period that also produced his bass chair with Ed and George Schuller, brothers he'd known since fronting a nonet at Manhattan's Jazzmania Club in the late 1970s and later hired as a stable working trio.

Konitz's later decades were, if anything, more prolific than his earlier ones. He recorded constantly for small independent and European labels — Philology, SteepleChase, Enja, and dozens of one-off festival and broadcast imprints — building a discography that Discogs alone credits with nearly 1,500 entries. Rather than repeating himself, he kept seeking out new duo and small-group foils: guitarist Peter Bernstein, a childhood neighbor from the same New York apartment building, finally got to record with him on 2001's Parallels (Chesky); drummer Matt Wilson became a recurring studio partner across Strings for Holiday (1996), the duo record Gong with Wind Suite (2002), and New Nonet (2006, directed by Ohad Talmor, with whom Konitz made six albums); French saxophonist Alexandra Grimal, barely thirty, found herself co-billed with Konitz, Gary Peacock, and Paul Motian on 2010's Owl's Talk; and teenage prodigy Grace Kelly shared alto duties with him on 2008's GRACEfulLEE.

The most significant of these late partnerships was with Minsarah, the trio of pianist Florian Weber, bassist Jeff Denson, and drummer Ziv Ravitz that had formed at Berklee around 2001-02. Konitz heard the group live in Germany around 2006 and began sitting in and touring with them; the relationship deepened into something closer to an adopted working band than a guest arrangement. Three weeks before his 80th birthday, in September 2007, Konitz and Minsarah recorded Deep Lee (Enja, 2008), mixing Konitz's and the trio's originals with a single standard, and followed it in 2009-10 with a standards-heavy live document, Live at the Village Vanguard, billed to the "Lee Konitz New Quartet (With) Minsarah." Konitz's individual bond with Denson outlasted the group billing — the two kept working together, by Denson's account, for "over a decade," producing a separate 2015 studio record, Jeff Denson Trio + Lee Konitz, and continuing until Konitz's death.

He kept recording almost to the end: 2018's Decade, a duo record with pianist Dan Tepfer built from fully unplanned improvised sessions, marked his 90th birthday and a ten-year partnership. He was named an NEA Jazz Master in 2009, on top of the Danish Jazzpar Prize he'd won in 1992. Lee Konitz died April 15, 2020, at Lenox Hill Hospital in New York, of pneumonia with complications from COVID-19, at age 92 — the last surviving member of the Birth of the Cool nonet, and the closing chapter of a recording career that ran, essentially unbroken in its restlessness, for seventy years.

Konitz's light, dry alto tone and Tristano-derived harmonic approach positioned him as cool jazz's most durable independent voice — a saxophonist whose sound was never absorbed into Charlie Parker's dominant bebop vocabulary even as most of his contemporaries' were. That independence had a specific pedagogical root: Tristano trained his circle to build improvisations from close, chromatic counterpoint and harmonic substitution rather than blues-based bebop vocabulary, and Konitz carried that discipline for the rest of his life, most visibly in his lifelong duo practice — pairing off against one new partner at a time (Marsh, Hall, Bernstein, Wilson, Grimal, Tepfer, Denson) rather than settling into a single fixed working band. He was also, unusually for a Tristano disciple, genuinely restless: the same musician who helped define "cool" restraint on Birth of the Cool also cut some of the earliest fully free improvisations on record with the 1949 Tristano Sextet, and kept returning to free and avant-garde settings (Braxton, Bailey, Hill) throughout his career. Critics and colleagues alike identified an ethic of constant reinvention as the throughline of his seven decades on record — a refusal to record the same solo, or lean on the same working band, twice.