Claude Sonnet 4.5legacy
Anthropic · released Sep 28, 2025
Popular 2025 workhorse behind much of the agentic tooling ecosystem.
42.4
Podium Score
#334 of 673
1456
Arena Elo
54 on Arena
80 t/s
Output Speed
$15/M
Output Price
$3/M in
200K
Context Window
Scores by Source
Category Scores
📜 Long Context85.2
Benchmark Results
Model Details
| Release date | Sep 28, 2025 |
|---|---|
| Parameters | Not disclosed |
| License | Proprietary |
| Context Window | 200,000 tokens |
| Input Price | $3/M |
| Output Price | $15/M |
| Output Speed | 80 t/s |
| Time to First Token | — |