Claude Haiku 5.5 joins Devin Fusion

Haiku 5.5 looks less like a flagship coder and more like the efficient second model agent platforms have been waiting for.

• –Devin Fusion reports a 66.2 FrontierCode score with Haiku 5.5 as its sidekick
• –Pricing starts at $0.10 per million input tokens and $0.50 per million output tokens for prompts up to 100,000 tokens
• –Its strongest role is handling narrow, repetitive tasks while larger models manage planning and complex implementation
• –Adjustable effort settings let developers trade reasoning quality for latency and cost
• –The rollout reinforces a multi-model architecture for coding agents rather than a single-model default