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Model board / Claude Opus 4.8

Claude Opus 4.8

previous Anthropic

Verified 2026-10-22 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

fast mode $10/$50

full 1M window at standard rates

read 0.1x input

Watch out

No price advantage over Opus 5, so migrate on capability rather than cost

What we would use it for

Identical pricing to Opus 5 — a safe pin if you are already validated on it

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→10-22 $25.00
newly stated2026-09-24 · max_output — 128,000 read off the model's own overview page, newly cited. Previously null.

Where these numbers came from

No number on this page was written that was not read from one of those pages on 2026-10-22. 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.

The rest of the board

This row sits alongside 76 others on the model board, refreshed every week. The same data as JSON, and the terms for using it, are at /board-data.