Claude Opus 4.5legacy
Anthropic · released Oct 31, 2025
Late-2025 Opus release that defined the agentic-coding bar of its generation.
52.1
Podium Score
#297 of 673
1473
Arena Elo
29 on Arena
50 t/s
Output Speed
$15/M
Output Price
$3/M in
200K
Context Window
Scores by Source
Category Scores
Benchmark Results
GPQA Diamond87%
SWE-Bench Verified80.9%
Model Details
| Release date | Oct 31, 2025 |
|---|---|
| Parameters | Not disclosed |
| License | Proprietary |
| Context Window | 200,000 tokens |
| Input Price | $3/M |
| Output Price | $15/M |
| Output Speed | 50 t/s |
| Time to First Token | — |