Claude Opus 4.1
retiredAnthropic · Frontier
Drop-in replacement for Opus 4 at the same $15/$75 pricing. Superseded by Opus 4.5 at 67% lower price.
- Strengths
- Refined Opus 4 with incremental quality gains at the same price.
- Best for
- Legacy integrations pinned to the pre-cut Opus line.
- Limitations
- An older, pricier Opus generation fully superseded by the post-4.5 line.
Input / 1M
$15.00
Output / 1M
$75.00
Cached input / 1M
$1.50
Context window
200K
Where it sits
728% above the frontier median
blended $/Mtok across 24 frontier models
Output costs 5× input
$15.00 in / $75.00 out per 1M
Cached input saves 90%
$1.50 vs $15.00 per 1M fresh
Held flat since launch (Aug 2025)
no blended price change recorded
Computed live from current prices and this model's history — not hand-written, so it stays accurate as prices move.
Price history
Only one price on record so far — the history chart appears once a price changes.
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 5 Aug 2025 | $15.00 | $75.00 | $1.50 | anthropic.com/pricing |