Claude Opus 4.8
Anthropic · released Apr 13, 2026
Extended-thinking Opus release focused on software engineering and long-horizon agent work.
76.0
Podium Score
#7 of 673
1484
Arena Elo
14 on Arena
50 t/s
Output Speed
$15/M
Output Price
$3/M in
1M
Context Window
Scores by Source
Category Scores
📜 Long Context99.2
👁️ Multimodal89.6
🧠 Reasoning82.8
🤖 Agentic74.9
📐 Math58.7
💻 Coding58.0
intelligence57.3
📚 Knowledge28.8
Benchmark Results
τ²-Bench Retail94.4%
GPQA Diamond93.6%
CharXiv Reasoning89.9%
SWE-Bench Verified88.6%
ScreenSpot-Pro87.9%
Browsecomp84.3%
MCP Atlas82.2%
SWE-Bench Pro69.2%
LiveCodeBench67.7%
Ifbench62.2%
Toolathlon59.9%
Terminal-Bench Hard58.3%
Humanity’s Last Exam57.9%
SciCode53.5%
Model Details
| Release date | Apr 13, 2026 |
|---|---|
| Parameters | Not disclosed |
| License | Proprietary |
| Context Window | 1,000,000 tokens |
| Input Price | $3/M |
| Output Price | $15/M |
| Output Speed | 50 t/s |
| Time to First Token | — |