Composer 2.5

Training compute

3.9×10²⁵ FLOP

Parameters

1T

Published

May 18, 2026

Composer 2.5 is an AI model developed by Cursor (United States), first published in May 2026. It works in the language domain, on tasks such as coding.

Training it took an estimated 3.9×10²⁵ FLOP of compute. The model has 1,040,000,000,000 parameters. Training ran on NVIDIA B300 (Blackwell Ultra).

Epoch AI rates the confidence of this record as likely.

Full record

Organization: Cursor
Country of organization: United States
Domain: Language
Task: Coding
Training compute: 3.9×10²⁵ FLOP
Parameters: 1,040,000,000,000
Training hardware: NVIDIA B300 (Blackwell Ultra)
Epoch confidence: Likely