Anthropic's Claude Opus 5 costs well below Fable 5 while matching or beating it across most benchmarks
Claude Opus 5 just beat GPT-5.6 Sol on the Artificial Analysis Intelligence Index. Half the cost. Same performance.
Why it matters
Anthropic's latest flagship model is winning on both capability benchmarks and unit economics, signaling a shift in how the market evaluates AI models—not just raw performance, but cost-adjusted value. This matters for enterprises choosing between closed-model providers.
The key facts
5 to knowClaude Opus 5 leads Artificial Analysis Intelligence Index with 61 points
Claude Opus 5 outperforms Claude Fable 5 and GPT-5.6 Sol across most benchmarks
Claude Opus 5 costs up to 50% less than Fable 5 at lower reasoning tiers
Claude Opus 5 scores highest in analytical quality and coding categories
Competitive race remains tight at the top of the model rankings
Go to the source
The Decoderthe-decoder.com
Publisher excerpt: Anthropic's Claude Opus 5 leads the Artificial Analysis Intelligence Index with 61 points, edging out Claude Fable 5 and GPT-5.6 Sol. The model scores highest in analytical quality and coding, and costs up to half as much as Fable 5 at lower reasoning tiers. But the race at the top remains close.