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This tweet recommends reading about how combining the Fable model with Sidekick reduces cost by 54% while maintaining nearly the same performance score, and speculates that similar patterns could apply to future GPT models.
Cognition introduces Devin Fusion, a multi-model harness that routes between frontier and cost-effective models using a sidekick architecture, achieving frontier-level performance at 35% lower cost.
Monday.com's Sidekick AI agent transitioned from a multi-agent architecture (200+ tools) to a deep agent architecture, solving context pollution and cost issues through three-layer tool discovery, priority delegation, code writing, and self-healing mechanisms.