Claude Opus 4.5

Anthropic llm

Flagship Opus-tier model succeeding Opus 4.1, launched as Anthropic's best model at the time for coding, agents and computer use.

overall ⌄

59.7

21 of 93 ranked

price · $/M tokens

5 / 25

in / out, as of 2026-07-25

to run it yourself ⌄

API only

no weights to run

Benchmarks

What its maker published, and what anyone else measured. Every figure links the document it came from.

On a 1,000-in, 1,000-out call these cost less and rank no lower — a hard comparison to argue with, and a narrow one. Value covers what it misses.

No recorded lineage — root or standalone model.