Devin Fusion
Devin Fusion routes work between a frontier lead model and a cheaper sidekick, claiming Fable 5-level quality at 60% lower cost.
It uses two strategies. One is a main agent that plans and reviews beside a cheaper executor with separate cached contexts, and the other is classifiers that switch models at context compaction. On FrontierCode it scores 63.1 at $1.35 per task. Fusion reached Devin Desktop and CLI on 2026-09-11.
- Date
- Monday, 29 June 2026
- Lab
- Cognition
- Kind
- feature
- Access
- research preview
Figures
| Measure | Value | Measured by |
|---|---|---|
| FrontierCode score / cost | 63.1 at $1.35 per task company eval; 25-62% savings by task type | company |
On 2026-09-11 Cognition claimed Fusion was up to 39% cheaper than Claude Code or Codex harnesses on its own tests.
Sources
This record was checked against its sources on 6 October 2026. How we check