Claude Opus 5 Delivers Flagship-Level Performance at Half the Cost

Anthropic rolled out Claude Opus 5 today, positioning it as a practical alternative to the company’s flagship Fable 5 while keeping the price tag half as steep.

Claude Opus 5 vs. Fable 5: performance gap narrows

Benchmarks show the new model outpaces its predecessor Opus 4.8 across agentic coding, novel problem solving, knowledge work, computer use and multidisciplinary reasoning. In scientific research tasks it delivers a meaningful improvement, and its visual output quality has risen noticeably.

“Opus 5 provides greatly improved performance for the same cost,” Anthropic said in a release.

Security‑focused assessments reveal Opus 5 approaches Mythos 5 in vulnerability discovery, though it lags in exploitation because it was not trained on cyber‑specific data. Mythos 5 remains restricted to a handful of infrastructure and cyber‑defense firms.

Pricing stays unchanged: ↑$5 per million input tokens and ↑$25 per million output tokens, with a fast‑mode option that runs 2.5× quicker for double the base rate. The model is now the default on Claude Max and the top tier on Claude Pro, available across all Anthropic platforms.

Analysts note that the cost‑performance balance could accelerate adoption in enterprise AI pipelines, a trend echoed by Reuters.

Reported by: Dr. Aris Thorne

Artificial Intelligence Researcher