Claude Opus 5

Name: Claude Opus 5
Brand: Anthropic
Price: 25.0 USD

previous Anthropic

Verified 2026-10-15 against the pages listed below. Prices are USD per 1M tokens, list rate — no committed-use, enterprise or volume discount.

Input

$5.00

Cached input

$0.5

Cache write

$6.25

Output

$25.00

Context window

1,000,000

Max output

128,000

Weights

closed

Caching

both

1h cache write $10.00; fast mode $10/$50

full 1M window at standard rates; 128K max output per request

read 0.1x input; 5m write 1.25x, 1h write 2x

Watch out

Now Legacy on Anthropic's models page: Claude Opus 5.5 is $4/$20 against this row's $5/$25, with a cache read at half the rate. Retirement not sooner than 2027-07-24, so there is no clock — but Opus 5.5 breaks code that disables thinking or forces tool_choice, so migrate on a test, not a find-and-replace

What we would use it for

Long agent runs already validated on it, and code that relies on disabling thinking or forcing a tool

What this has cost, week by week

Output price at each refresh since 2026-07-30. A vendor change is the provider changing its price. Our correction means this board changed what it prints and the provider's charge did not move — the two are never merged, because publishing the second as the first would be a price rise that never happened.

07-30 $25.00→08-06 $25.00→08-14 $25.00→08-20 $25.00→08-27 $25.00→09-03 $25.00→09-10 $25.00→09-17 $25.00→09-24 $25.00→10-01 $25.00→10-08 $25.00→10-15 $25.00

newly stated2026-09-03 · max_output — 128,000 read off Anthropic's models overview page, which this row now cites. Previously null.

Where these numbers came from

No number on this page was written that was not read from one of those pages on 2026-10-15. If one is wrong, send us the source URL and it is corrected in the next weekly refresh, with a changelog line saying what was wrong — contact@naderu.com.

Jobs this is one of our picks for

Computer use — Vision and tools driving a real UI (computer-use)

Discussed in Naderu Weekly

Three launches, no price rises — 2026-09-24
The price has a clock on it — 2026-08-27

The rest of the board

This row sits alongside 69 others on the model board, refreshed every week. The same data as JSON, and the terms for using it, are at /board-data.