Quoting Drew Breunig

<blockquote cite="https://www.dbreunig.com/2026/08/23/fable-the-end-of-moore-s-law.html"><p>Prior to Fable, it felt silly to waste <em>too</em> much time improving your coding harness or context strategies. A new model would arrive at the same price (or cheaper!) and paper over most of your problems.</p> <p>But then Fable landed. It was (and still is!) <em>incredible</em>. But the cost was so high and Opus was <em>good enough</em> (as was 5.6, K3, and even GLM) for <em>most</em> of the code we needed.</p> <p><em>So we started to think about what work went where.</em></p></blockquote> <p class="cite">&mdash; <a href="https://www.dbreunig.com/2026/08/23/fable-the-end-of-moore-s-law.html">Drew Breunig</a>, Fable &amp; The End of the Free Lunch</p> <p>Tags: <a href="https://simonwillison.net/tags/drew-breunig">drew-breunig</a>, <a href="https://simonwillison.net/tags/anthropic">anthropic</a>, <a href="https://simonwillison.net/tags/claude">claude</a>, <a href="https://simonwillison.net/tags/llm-pricing">llm-pricing</a>, <a href="https://simonwillison.net/tags/ai">ai</a>, <a href="https://simonwillison.net/tags/llms">llms</a>, <a href="https://simonwillison.net/tags/generative-ai">generative-ai</a>, <a href="https://simonwillison.net/tags/claude-mythos-fable">claude-mythos-fable</a></p>