What is Devin Fusion?
Devin's multi-model routing with sidekick agents.
Who is Devin Fusion best for?
Devin Fusion is best for Devin users who want frontier-model quality on hard coding tasks and cheaper models for routine work.
Mechanical coding work
Refactors, removals of old code and slow test runs go to the cheaper sidekick; Cognition's own examples cut cost by 32% to 62% at about the same quality.
Teams watching model spend
Cognition reports scores close to top frontier models on its FrontierCode benchmark at up to 60% lower cost per task.
Hard tasks that still need a frontier planner
The lead model keeps the plan, the calls on unclear requirements and the final review, while the sidekick writes code and runs builds and tests.
Devin CLI and Desktop users
The /fusion picker sets the lead, effort and sidekick, and /session-stats shows cost by model and the estimated savings.
How much does Devin Fusion cost?
Devin Fusion is included in Devin's paid plans: Pro at $20 a month, Max at $200 a month, or Teams at $80 a month plus $40 per full user, and each session draws on your quota at the lead and sidekick models' own rates.
- Higher quotas with frontier and open models
- Cloud agents (Devin Cloud)
- Extra usage at API pricing
- Plus $40 per full user a month, up to 200 users
- Central billing and an admin dashboard with analytics
- Priority support
- Everything in Pro
- Much higher quotas than Pro
- One user
Fusion is not included in Devin's Free plan, in trials or on legacy credit-based plans. Enterprise is priced through sales and meters Fusion in ACUs (Agent Compute Units). Paid plans come with a usage allowance that refreshes daily and weekly; a Fusion session uses it at the lead model's rate for the lead's tokens and the sidekick's lower rate for the sidekick's, and usage beyond the allowance is billed at API prices. Fusion needs Devin CLI 3000.10.20 or Devin Desktop 3.10.0 or later. Full pricing on devin.ai. We checked these prices on .
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Questions about Devin Fusion
What is Devin Fusion?
Devin's multi-model routing with sidekick agents.
Who is Devin Fusion for?
Devin Fusion is best for Devin users who want frontier-model quality on hard coding tasks and cheaper models for routine work.
Is Devin Fusion free?
No. Devin has a Free plan, but Fusion is not included in it or in trials. You need a paid plan such as Pro at $20 a month, and Fusion sessions then draw on that plan's usage allowance at each model's own rate.
How much does Devin Fusion cost?
Devin Fusion's paid plans are Pro at $20 per month, Teams at $80 per month for the team and Max at $200 per month.
Where can I try Devin Fusion?
On its official website, cognition.com.
When is Devin Fusion a poor fit?
On tasks where the judgment calls are the work itself. In Cognition's own examples, handing a hard, multi-file React feature to the sidekick cut cost by 28% but halved the quality score, while mechanical refactors and test runs got cheaper at about the same quality.
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