Claude Opus 5.5

Intelligence

168.4 ECI

90% range: 165.37 to 173.03 on the Epoch Capabilities Index.

Price per million tokens

Input

$4

Output

$20

Cached input

$0.20

Blended

$8

From the lab's price page, checked 2026-11-01.

On our coding tasks

Mean cost per task

$0.20 at list price

Mean output tokens

2,185

Time per task

44.9 s median

Included tasks passed

18 of 18

Interrupted attempts excluded

0

Run with

Claude Code headless, effort high, 2026-11-01

Historical plan observations

No historical plan observation is linked to this model.

Historical observations do not establish current-tier allowances. Allowance dates, ranges and assumptions.