Anthropic's Claude Fable 5.1 released with benchmark gains, cost debates · 10 sources tracked
ByPulseAugur Editorial·[36 sources]·
Anthropic has released Claude Fable 5.1, a new iteration of its AI model, which is now available on platforms like Cursor and Perplexity. This release boasts significant improvements in benchmarks, particularly in agentic tasks and reducing refusals on benign queries. However, the pricing structure remains a point of discussion, with effective costs varying based on cache hit rates and workload type, leading to debates about whether it justifies the doubled price compared to Opus 5 for certain applications.
AI
IMPACT
Sets new SOTA on agentic tasks and reduces refusals, potentially impacting enterprise adoption and cost-efficiency calculations.
RANK_REASON
Frontier-lab model release with system card and benchmark data.
Claude Fable 5.1 is now available in Cursor!
It's the most capable model we’ve run on CursorBench 3.2, scoring 73.4% at max effort.
We found it especially skilled at verifying its own work, allowing it to take on difficult coding tasks from start to finish.
Claude Fable 5.1 is now available in Perplexity Computer for Pro and Max subscribers.
It ranked first in our August WANDR evaluation at 0.601 and $12.76 per task, a 21% higher score and 37% lower cost than Fable 5. https://t.co/dYhkTZnngo
dev.to — Claude Code tag
TIER_1English(EN)·RAXXO Studios·
<ul> <li><p>Fable 5.1 more than doubles Fable 5 on Terminal-Bench-Science, 52.6 percent against 24.7</p></li> <li><p>Cache reads drop from 1.00 to 0.25 dollars per million tokens, a 75 percent cut that input and output pricing do not show</p></li> <li><p>It beats Opus 5 on all ni…
dev.to — Claude Code tag
TIER_1English(EN)·RAXXO Studios·
<ul> <li><p>Fable 5.1 costs twice what Opus 5 does on input and output, and the benchmark gaps do not justify that for most work</p></li> <li><p>On single hard questions the two are within 1.4 points, so Opus 5 is the value pick</p></li> <li><p>On long unattended agent runs the g…
dev.to — Claude Code tag
TIER_1English(EN)·RAXXO Studios·
<ul> <li><p>Fable 5.1 refuses benign elementary biology and medical questions 85 percent less often than Fable 5</p></li> <li><p>Cybersecurity false positives are down 60 percent, and identifying vulnerabilities is now allowed while exploit generation is not</p></li> <li><p>A ref…
Medium — Claude tag
TIER_1English(EN)·Yashraj Behera·
<p><strong>Claude Fable 5</strong> has quickly become the center of discussion among software engineering teams since its early June 2026 launch. The model is Anthropic's most powerful reasoning engine to date. Anthropic designed the model specifically to handle complex coding an…
<div class="medium-feed-item"><p class="medium-feed-snippet">Anthropic shipped two models on 1 September. Here is what actually changed.</p><p class="medium-feed-link"><a href="https://medium.com/@sanusonkar1/claude-fable-5-1-explained-simply-8294c06826e7?source=rss------claude-5…
<h1> Claude Fable 5.1 Review </h1> <p>When Anthropic shipped <a href="https://dev.to/blog/claude-fable-5-review-benchmarks-developer-guide-2026/">Claude Fable 5</a> in June, I wrote that the price doubling was the headline, not the benchmarks. Ten dollars per million input tokens…
<p><em>Disclosure: this piece was drafted with Claude Fable 5.1 on its launch day, inside the pipeline that writes every SharpHaw post. I read it, corrected it and edited it before it went out.</em></p> <p>Anthropic shipped Claude Fable 5.1 on 1 September. The benchmarks are in e…
dev.to — LLM tag
TIER_1Türkçe(TR)·Tobias Hoffmann·
<p>Claude Fable 5.1'e geçiş çoğunlukla model kimliğini değiştirmekten ibarettir. API yüzeyi, limitler, jeton başına fiyatlandırma, tokenize edici, her zaman açık uyarlanabilir düşünme ve reddetme yönetimi Fable 5 ile aynıdır. Ancak Fable 5'in döndürmediği üç yeni hata vardır. Bun…
dev.to — LLM tag
TIER_1Türkçe(TR)·Tobias Hoffmann·
<h1> Claude Fable 5.1 ve Fable 5: Yükseltme Değer mi? </h1> <p>Claude Fable 5.1, 1 Eylül 2026'da Fable 5'in yerini aldı. Milyon token başına giriş ve çıkış fiyatları 10 ve 50 dolar olarak aynı kalırken, önbellek okuma ücreti milyon token başına 1 dolardan 0,25 dolara düştü. Anthr…
Claude Fable 5.1: check your version first Claude Fable 5.1 is out, and it is included on Max. claude --version needs 2.1.257 claude update /model claude-fable-5-1 Both of my machines were too old to run it. Check yours first. What version is your Claude on right now? Full breakd…
<!-- SC_OFF --><div class="md"><p>I tried Fable 5.1 and I can confirm it already surpasses Fable 5, Opus 5, and GPT‑5.6 Sol.<br /> While its results are ALMOST impressive, but he cost of Fable 5.1 is unacceptably too high(the DNA of Anthropic and its weak point). </p> <p>Consider…
<table> <tr><td> <a href="https://www.reddit.com/r/singularity/comments/1w8b8kv/as_per_artificial_analysis_index_muse_13_is_at/"> <img alt="As Per Artificial Analysis Index Muse 1.3 is at the same level as Fable 5" src="https://preview.redd.it/e33flytjernh1.png?width=140&heig…
