Fable's cost ends the 'free lunch' era for LLM engineering

Simon Willison · rss · 2026-08-24

Drew Breunig notes that prior to Fable, investing heavily in coding harnesses or context strategies felt unnecessary, as new models would arrive at similar prices and solve most issues. However, Fable's high cost compared to capable alternatives like Opus, 5.6, K3, and GLM has forced a strategic rethink about task distribution, marking the end of the era where model iterations provided a 'free lunch' for engineering problems.

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