Claude Opus 4.5
legacyAnthropic · Frontier
Introduced the 67% Opus price cut — from $15/$75 (Opus 4/4.1) to $5/$25 — which held through all subsequent Opus releases.
- Strengths
- Landmark release that cut Opus pricing 67%, with capable frontier reasoning.
- Best for
- Workloads happy on a 200K context that want proven Opus quality.
- Limitations
- 200K context and an older generation; surpassed by the 4.6+ line.
Input / 1M
$5.00
Output / 1M
$25.00
Cached input / 1M
$0.5
Context window
200K
Where it sits
20th-cheapest frontier model
by blended $/Mtok among 24 listed frontier models
176% above the frontier median
blended $/Mtok across 24 frontier models
Output costs 5× input
$5.00 in / $25.00 out per 1M
Cached input saves 90%
$0.5 vs $5.00 per 1M fresh
Held flat since launch (Nov 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 |
|---|---|---|---|---|---|
| 24 Nov 2025 | $5.00 | $25.00 | $0.5 | 67% price cut from Opus 4/4.1 | anthropic.com/pricing |