Abacus.AI Adds Opus 5 and a GPT-5.6 xHigh Mode for Routing to Top-Tier Models

The platform now routes the hardest agent tasks to frontier models, packaging model selection as a built-in feature rather than a developer decision.

Abacus.AI announced it has launched Opus 5 and a GPT-5.6 xHigh Mode on its agent platform, letting users route their hardest tasks to top-tier models, per @abacusai. The mechanic is model routing — matching task difficulty to model capability automatically — and it's becoming a standard layer in agent tooling.

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