AI Model Profile · Cursor
Composer 2
Composer 2 is an AI model developed by Cursor (United States), released March 19, 2026. It has approximately 1.0T parameters. It was trained on about 2.3×1025 FLOP of compute. It is a closed model available via API.
API access · Epoch confidence: Confident · Source: Epoch AI · Updated 2026-08-17
Specifications
| Developer | Cursor |
| Country | United States |
| Released | March 19, 2026 |
| Domain | Language |
| Parameters | 1.0T |
| Training compute | 2.3×1025 FLOP |
| Training hardware | NVIDIA B300 (Blackwell Ultra) |
| Weights | Closed / API |
| Access | API access |
| Base model | Kimi K2.5 |
All figures from Epoch AI's Notable AI Models database (CC BY 4.0). Blank fields are undisclosed by the developer — never estimated by Affärslivet.
Frequently asked
- Who developed Composer 2?
- Composer 2 was developed by Cursor (United States) and released on March 19, 2026.
- How big is Composer 2?
- Composer 2 has approximately 1.0T parameters and was trained on about 2.3×10^25 FLOP of compute. Source: Epoch AI.
- Is Composer 2 open source?
- Composer 2 is a closed model — its weights are not publicly released; it is available via API access.
Sources
Cite this model profile
Free to cite, quote and reference under CC BY 4.0 — with attribution to Affärslivet. Writing an article or answer? Reference this model profile as:
APA
Affärslivet Research. (2026). Composer 2 — specifications & benchmarks. Affärslivet. https://xn--affrslivet-s5a.com/en/ai/models/composer-2
MLA
"Composer 2 — specifications & benchmarks." Affärslivet, 2026-08-17, xn--affrslivet-s5a.com/en/ai/models/composer-2.
Source: Affärslivet — xn--affrslivet-s5a.com/en/ai/models/composer-2. Attribute to Affärslivet when citing or linking.