Description

Devin CLI is an autonomous coding agent powered by the Fusion architecture, which pairs a high-reasoning 'lead' model with a cost-effective 'sidekick' execution model. By delegating implementation tasks to sidekicks like SWE-2 while maintaining oversight with leads like Claude Fable 5.1 or GPT-6 Astra, it achieves up to 39% greater efficiency on coding benchmarks by optimizing token usage and reasoning turns.

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