Claude Opus 5, launched at half the price of Fable 5, surpasses it in performance across key benchmarks, making it the primary choice for users.
Overview
On July 24, Anthropic launched Claude Opus 5, priced at $5 per million input tokens, making it 50% cheaper than its competitor, Fable 5. Not only does Opus 5 offer significant cost savings, but it also outperforms Fable 5 in key performance metrics.
Performance Metrics
In the Frontier-Bench v0.1 coding capability assessment, Opus 5 secured a score of 43.3%, surpassing Fable 5's 33.7% and OpenAI's GPT-5.6 Sol at 34.4%. The ARC-AGI-3 benchmark, which tests innovative problem-solving, saw Opus 5 achieve a score of 30.2%, a stark contrast to GPT-5.6 Sol's 7.8% performance.
Lovable, a developer platform, conducted an internal evaluation of Opus 5, noting a 22% improvement over Opus 4.7 in tackling complex coding challenges, as well as enhanced consistency in its results. "It’s not only better on our toughest coding challenges, but it’s also more consistent," stated Fabian Hedin from Anthropic.
Market Positioning
Opus 5 has replaced Fable 5 as the default model on Claude Max and is the leading option available on Claude Pro. Anthropic has structured its offerings into four tiers: Haiku, Sonnet, Opus, and Mythos, with Opus being the robust choice. Fable 5, which faced challenges post-launch due to a U.S. export control order, has transitioned to a credits-only model, further solidifying Opus 5's position.
Additional Insights
Opus 5's capabilities extend to business workflow automation, achieving a 100% success rate in a test by Zapier, which assessed its ability to manage a complete churn-prevention sequence autonomously. Ultima Genomics, a DNA sequencing company, praised Opus 5 for its analytical capabilities, stating it operates more like a meticulous scientist.
However, Fable 5 retains a slight edge in specific fields such as legal and healthcare applications. Opus 5 is now available via API, with options for a Fast mode at increased costs, addressing concerns about the availability of Fable 5 to the public.
