Static
Claude Fable 5
Mythos-class · The capability ceiling
Capable ofHighest-end reasoning, frontier coding, agentic work. WebDev Arena 1653 Elo — 92 pts clear of #2, widest gap ever recorded. 80.3% SWE-bench Pro (vendor).
Useful forProblems everything else fails on; hardest architecture, deep multi-step builds.
Best caseWhen you need the absolute ceiling and price is secondary.
$10 / $50 per Mctx —Suspended Jun 12–30 — restored Jul 1
Static
Claude Opus 4.8
The pragmatic frontier default
Capable of#1 agentic coding (69.2% SWE-bench Pro, 88.6% Verified), #1 knowledge work (GDPval-AA 1,890 Elo), leads Humanity's Last Exam, #1 Intelligence Index (61).
Useful forLong-horizon agents, production coding, serious knowledge work. Fast mode at 2.5× output.
Best caseDaily-driver for hard eng work — half Fable's price, ~95% of the power.
$5 / $25 per Mctx —Powers Claude Code / Cursor / Windsurf stack
Static
Claude Sonnet 5
Best value at the quality frontier
Capable of63.2% SWE-bench Pro, beats Opus 4.8 on Terminal-Bench 2.1, ties it on GDPval knowledge work.
Useful forProduction agents, content pipelines, professional writing at 60% less cost.
Best caseDefault workhorse for a solo SaaS stack — frontier quality, mid-tier price.
$2 / $10 introctx —New tokenizer: ~30% more tokens per text