كلاود فابل ٥

ما هو «كلود فابل 5»؟

Claude Fable 5 is Anthropic’s most capable widely released model, positioned above the
Opus tier and priced accordingly at $10 in / $50 out per million tokens. Thinking is always
on — there is no non-reasoning mode to fall back to — which is what makes it strong on
long-horizon agentic work and what makes it expensive on anything trivial. It pairs a
1M-token context window with a 128K maximum output, an unusually large generation budget
that matters when the task is producing a long artifact rather than answering a question.

The economics only work at the top of the difficulty curve. At $50 per million output
tokens, Fable 5 costs roughly five times Claude Opus 4.8 on the output side, so routing
ordinary requests to it burns budget for no measurable gain. The sensible pattern is a
router: Fable 5 for the small share of tasks where a wrong answer is expensive — multi-step
agents that run unattended, deep research, refactors across a large codebase — and a
Sonnet- or Haiku-tier model for everything else. If your workload is mostly retrieval and
summarisation, the price gap will dominate your bill long before capability does.