How long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
Newest first — what each version changed versus the one before, in Anthropic's own numbers.
Anthropic's top model, refreshed: big jumps on long coding and scientific-research tasks, and cached input now costs 75% less — same headline price as Fable 5.
Compared with Claude Fable 5 · the model it replaces
Finishes over half of long multi-step coding tasks
Terminal-Bench 4.0 — long agentic coding sessions in a terminal
55.8%
▲ up from 42.0% · +14 points
Doubles its score on agentic scientific research
Terminal-Bench-Science 0.1 — running real research workflows end to end
52.6%
▲ up from 24.7% · more than doubled
Same price — and cached input now costs 75% less
Price per 1M tokens — what developers pay, input / output
$10 / $50
same as Fable 5 · cache reads now $0.25
Anthropic's new top-end model: a big jump on hard coding tasks over Opus 4.8 — at twice the price.
Compared with Claude Opus 4.8 · the model it replaces
Solves 8 in 10 hard real-world coding tasks
SWE-bench Pro — fixing real bugs in real software projects
80.3%
▲ up from 69.2% · +11 points
Solves about 3 in 10 research-grade coding problems
FrontierCode Diamond — the hardest tier of coding evals
29.3%
▲ up from 13.4% · more than doubled
Costs developers twice as much to run
Price per 1M tokens — what developers pay, input / output
$10 / $50
price doubled — was $5 / $25
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