Anthropic released Claude Opus 5: the model nearly matches the flagship Fable 5 in quality but costs half as much — $5 input and $25 output per million tokens. Opus 5 is now the default model in Claude Max and Pro subscriptions.
What it's built for
Coding, agentic tasks, and professional work. Anthropic is clearly targeting developers and teams building agent pipelines or using tools like Claude Code.
Why it matters
Fable 5 is Anthropic's current flagship — the most capable model in the lineup. Opus 5 sits one tier below in price, but close behind in quality. For most professional use cases, that means near-flagship capability without the flagship premium.