Claude Opus 4.5
ModelActiveby Anthropic · family “claude-opus”
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and... (description from the OpenRouter listing)
in: filein: imagein: textout: textReasoningTool useStructured output
Epoch Capabilities Index
150.1 #47 of 268
90% CI 147.9 – 152.7
Released
24 Nov 2025
Context window
200K tokens
Max output
64K tokens
Input $ / 1M tokens
$5.00
Output $ / 1M tokens
$25.0
Cached input $ / 1M
$0.50
Each benchmark shown separately with its own source
Benchmark results (3)
| Benchmark | Domain | Score | vs best recorded | Setting | Run | Source |
|---|---|---|---|---|---|---|
| LMCA | agents | 44.5% | 68% | high | — | External ↗ |
| DTBench | reasoning | 89.9% | 91% | high | — | External ↗ |
| DeepResearch Bench | agents | 54.8% | 99% | high | — | External ↗ |
Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.
API list price over time
Price history
$ per 1M tokens
11 observations (OpenRouter listing + Internet Archive snapshots). History accumulates with every ingest run; a single point means no change has been observed yet.
Events
- Model launch10mo agoAnthropic releases Claude Opus 4.5Epoch AI Benchmarking Hub