Anthropic 的新 Claude Fable 5 模型，尽管每 token 成本更高，但在复杂任务上展现出比其前代 Opus 4.8 更高的效率和性能。基准测试显示，Fable 5 在编码和代理任务中得分更高，通常使用的 token 更少，这可能导致高要求工作负载的总体成本更低。该模型还采用分层方法，其中“低”努力设置被证明具有惊人的能力和成本效益，而某些敏感领域会触发回退到 Opus 4.8 以确保安全性和可靠性。
AI
影响Claude Fable 5 为代理任务性能和 token 效率树立了新标准，可能降低复杂 AI 工作负载的运营成本，并迫使竞争对手匹配其功能。
<ul> <li><p>Fable 5 costs 10 dollars per million input tokens against 5 for Opus 4.8, output is 50 vs 25</p></li> <li><p>SWE-Bench Pro gap is 11.1 points, and FrontierCode more than doubles at 29.3 vs 13.4</p></li> <li><p>Same API surface with one new 400: explicit thinking disab…
<p>The headline number is 95% on SWE-bench Verified. That's the score attached to Claude Fable 5, Anthropic's new general-access model in the Mythos class, which started showing up in comparisons this week alongside the still-shipping Claude Opus 4.8. On SWE-bench Pro, a harder v…
<p><em>Anthropic’s new flagship comes with a twist nobody else has tried. It’s one model wearing two names, and one of them you can’t have. Under the hood, the coding numbers are genuinely startling. The price tag is too. Here’s the honest map of where it lands against GPT-5.5, G…
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TIER_1English(EN)·Hardik Singhvi·
Opus 4.8 and Fable 5 build the same app. Actually 3 apps: an E-commerce store, a 3D art museum, and an Age Of Empires-style game. Fable did a lot better on all of them and it made what looks like a really amazing Age Of Empires-style game. He (Pat Simmons) used some new Claude dy…
🤖 Fable 5 outperforms Opus 4.8 at lower cost despite higher token price Claude Fable 5 achieves better performance than Opus 4.8 at a lower total cost despite having a higher token price, due to its greater efficiency and reduced token usage. This surprising development comes as …
<p><code>claude-fable-5</code> is now available on the Synthorai gateway. If you cache against the Claude line, the good news is that the caching and TTL contract is a carry-over: same <code>cache_control</code> markers, same 5-minute and 1-hour TTLs, same write premiums, same de…
<!-- SC_OFF --><div class="md"><p>If the truly capable models stay gated, what realistically sits between Opus 4.8 and Fable 5? Are we heading toward incremental point releases (an “Opus 4.8.1” cadence) as the default for the wider/non-US userbase, on the logic that stronger mode…
<!-- SC_OFF --><div class="md"><p>This post has specific safety measures that flagged something in this message. This sometimes happens with safe, normal conversations. </p> </div><!-- SC_ON -->   submitted by   <a href="https://www.reddit.com/user/Unfair-Map"> /u/Unfair-…
<table> <tr><td> <a href="https://www.reddit.com/r/ClaudeAI/comments/1u56ty1/i_had_claude_opus_46_review_code_written_by_fable/"> <img alt="I had Claude Opus 4.6 review code written by Fable 5" src="https://preview.redd.it/7cnz8oc9957h1.png?width=640&crop=smart&auto=webp&…
<table> <tr><td> <a href="https://www.reddit.com/r/ClaudeAI/comments/1u35cgu/differences_between_claude_opus_48_and_claude/"> <img alt="Differences Between Claude Opus 4.8 and Claude Fable 5 on MineBench" src="https://preview.redd.it/idf10lpxro6h1.gif?frame=1&width=140&he…
<!-- SC_OFF --><div class="md"><p>I don't need to spend an hour prodding it to get it to do something for it to make 10 mistakes and have to redo it 3 times when bugs come up. I am using at least half as many tokens before. </p> <p>It's cost per token for actually functional code…
<table> <tr><td> <a href="https://www.reddit.com/r/singularity/comments/1u35fjw/differences_between_claude_opus_48_and_claude/"> <img alt="Differences Between Claude Opus 4.8 and Claude Fable 5 on MineBench" src="https://preview.redd.it/1804akdkto6h1.gif?frame=1&width=140&…
