How-ToDevelopersOctober 1, 2026

LangChain cuts coding agent cost 64% with model router

Read original source →langchain.com

LangChain built a model router into Open SWE's harness that cut median cost per coding task by 64% versus always using a top-tier frontier model, with no measurable quality drop. The post argues routing belongs in the harness, not a generic gateway, since model choice needs task context the harness already assembles.

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