A quiet but important story of September 2026 is falling cost. Anthropic's Claude Fable 5.1 cut cache-read prices to about a quarter of the previous version, xAI's Grok 4.7 uses tiered pricing that rewards smaller prompts, and open-weight families such as Abacus.AI's Smaug compete directly on the price of running agent workloads.
These all attack the same bill: an agent that finishes one job may make thousands of model calls, so small per-call savings add up fast.
What it means: the economics of automation are improving even when headline capability is not the news. For a business, a task that was too expensive to automate six months ago may now pay off, so it is worth periodically re-checking the numbers on jobs previously judged uneconomic.