Final answer:
Brahms's Symphony No. 1 departs from Beethoven's models with its introspective themes, romantic expressiveness, and structural complexity, particularly in the final movement which offers a personal resolution rather than a traditionally triumphant finale.
Step-by-step explanation:
One significant way in which Brahms's Symphony No. 1 departs from Beethoven's models is through its complex structure and emotional range that extends beyond the classical forms Beethoven often employed.
Brahms's work is typically more introspective, featuring innovative use of themes and motifs that evolve throughout the movements. While Beethoven's influence is undeniable in Brahms’s symphonic work, Brahms also introduced his unique voice, characterized by romantic expressiveness and structural complexity.
This can be heard in the symphony's final movement, which, rather than a clear reflection of Beethoven’s triumphant finales, develops a more personal, brooding character before resolving into a major key.