Model board / Claude Sonnet 5

Claude Sonnet 5

Name: Claude Sonnet 5
Brand: Anthropic
Price: 10.0 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

$2.00

Cached input

$0.2

Cache write

$2.50

Output

$10.00

Context window

1,000,000

Max output

128,000

Weights

closed

Caching

both

$2/$10 is the standard rate; the rise to $3/$15 once announced for 2026-09-01 was withdrawn. 1h cache write $4.00

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

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

Watch out

Legacy on Anthropic's overview since Sonnet 5.5 shipped on 2026-09-28 at the same list price. Not deprecated — retirement no sooner than 2027-06-30 — but since 2026-10-07 its $0.20 cache read is twice Sonnet 5.5's $0.10, and it caches from 1,024 tokens where Sonnet 5.5 caches from 512

What we would use it for

Existing Sonnet 5 integrations that rely on forced tool use or on switching thinking off — both of which Sonnet 5.5 refuses

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 $10.00→08-06 $10.00→08-14 $10.00→08-20 $10.00→08-27 $10.00→09-03 $10.00→09-10 $10.00→09-17 $10.00→09-24 $10.00→10-01 $10.00→10-08 $10.00→10-15 $10.00

newly stated2026-09-03 · max_output — 128,000 from the same page. 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

Why web search busts your prompt cache — 2026-10-15
Stop paying for words you throw away — 2026-10-08
Same price, new rules — 2026-10-01
The price has a clock on it — 2026-08-27
The clock is now part of the bill — 2026-08-14
The same weights, twice — 2026-08-06

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.