GPT-6 Astra tops Zapier's AutomationBench at 41.4%, first model ever to clear 40%

sandersted · x · 2026-09-04

Zapier reports GPT-6 Astra scored 41.4% on AutomationBench — the highest ever and the first above 40% (previous best: GPT-5.6-Sol at 28.8%). The benchmark tests agents on end-to-end workflows with 47 real tools across Sales, Marketing, Operations, Support, Finance and HR, scored deterministically on final environment state. Astra excels at arithmetic across messy sources (reconciliation, deal review, vendor scorecards); Operations/Support are its strongest domains, HR weakest. Current leaderboard: Claude Fable 5.1 + Opus 5 fallback 31.4% ($2.45/task), Gemini 3.7 Flash 30.44% ($0.61).

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