Anthropic
Claude Opus 4.8
Superseded by Claude Opus 5
Released
2026-05-28
License
proprietary
Context window
1,000K tokens
Knowledge cutoff
Not disclosed
Pricing
$5.00 in / $25.00 out per 1M tokens — official pricing
In plain English: Superseded by Claude Opus 5 (2026-07-24, same $5/$25 pricing). Anthropic docs move it to 'Legacy models' with a migration guide, but it is formally still Active — tentative retirement not before 2027-05-28 — and serves as Claude Fable 5's automatic fallback for classifier-refused requests. Standard pricing shown; a $10/$50 'Fast Mode' tier is also offered.
Benchmark scores
| Benchmark | Score |
|---|---|
| 🧠 Reasoning(no tools) | 48.7independent |
| 🧠 Reasoning(with tools) | 57.9self-reported |
| 💻 Terminal ops | 78.9independent |
| 🛠️ Long-horizon coding | 59.0independent |
| 🧰 Multi-tool chores | 76.2independent |
| 💼 Professional work | 27.0independent |
| 🐛 Bug fixing | 88.6independent |
| 🔬 Expert science Q&A | 92.4independent |
| ⌨️ Contest coding | 87.8independent |