Anthropic's latest model, Claude Fable 5, has scored 161 on the Epoch Capabilities Index, edging past OpenAI's GPT-5.5 Pro. The result, published this week by Crypto Briefing, gives Anthropic a clear performance lead and could tip enterprise AI investment in its direction.
Claude Fable 5's 161 score
The Epoch Capabilities Index is a widely watched benchmark that measures AI models across reasoning, coding, and multimodal tasks. A score of 161 puts Claude Fable 5 ahead of GPT-5.5 Pro, which held the previous top spot. The margin isn't huge, but it's enough to claim the number-one position.
Why enterprise buyers are watching
Large companies evaluating AI platforms care about raw scores, but they also track which vendor looks like a long-term leader. The fact that Anthropic now leads a respected benchmark could sway procurement decisions. The timing matters — many enterprises are still in early-stage AI adoption and haven't locked in a single provider.
Cost-effectiveness as a differentiator
Anthropic has been emphasizing productivity and cost-effectiveness with Claude Fable 5. That message fits the current mood in enterprise tech, where budgets are under scrutiny. A benchmark lead combined with a lower-cost pitch gives the company a strong hand in the sales cycle against OpenAI and Google.
The score also puts pressure on OpenAI to respond with its next model revision. For now, Anthropic can claim both the performance crown and the efficiency argument — a rare combination in the AI arms race.
