Τ³-Bench is out – can agents handle complex docs and live calls?

Show HN: Τ³-Bench is out – can agents handle complex docs and live calls?

Τ³-Bench is out – can agents handle complex docs and live calls? operates in show hn launch.

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τ-Bench is an open benchmark for evaluating AI agents on grounded, multi-turn customer service tasks with verifiable outcomes. It's been great to see the community adopt it since launch — this is now the third iteration. With τ³-Bench, we're extending it to two new settings: knowledge-intensive retrieval and full-duplex voice.τ-Knowledge: agents must navigate ~700 interconnected policy documents to complete multi-step tasks. Best frontier model (GPT-5.2, high reasoning) hits ~25%. The surprising part: even when you hand the model the exact documents it needs, performance only reaches ~40%. We found that the bottleneck isn't retrieval — it's reasoning over complex, interlinked policies and ex

Τ³-Bench is out – can agents handle complex docs and live calls? is positioned in show hn launch, a segment that rewards a clear, focused offering.

The company is listed at the Show HN launch stage of development.

Website: sierra.ai/blog/bench-advancing-agent-benchmarking-to