Claude Opus 5 Outperforms Fable 5 on Most Benchmarks at Half the Cost
What happened: Anthropic launched Claude Opus 5, claiming superior performance to its own frontier model, Fable 5, on most benchmarks—while charging half the price ($5/$25 per million tokens).
What happened: Anthropic launched Claude Opus 5, claiming superior performance to its own frontier model, Fable 5, on most benchmarks—while charging half the price ($5/$25 per million tokens). On the Frontier-Bench v0.1, Opus 5 scored 43.3% versus Fable 5's 33.7%. However, these results are vendor-published and await independent verification.
Why it matters: If confirmed, Opus 5's performance-to-cost ratio could reshape the competitive landscape for enterprise AI, especially as demand for high-quality, affordable models grows. The launch also highlights the rapid pace of model iteration and the importance of transparent, third-party benchmarking.