Long-Context Costs Are Collapsing, and That Quietly Changes What Agents Can Afford to Do
Anthropic reportedly shipped Claude Fable 5.1 with a 1M-token context and slashed cache-read pricing from $1.00 to $0.25 per million tokens — a 75% cut that reshapes the economics of long-running agents.
Buried under the week's dramatic agent-escape stories was a pricing change with more immediate consequences for anyone actually building. According to @TrivanceAI, Anthropic shipped Claude Fable 5.1 — a model that reads 1M tokens — and cut cache-read pricing from $1.00 to $0.25 per million tokens. That 75% reduction is not a headline number, but it is the kind of change that silently rewrites what is economically viable.
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