Claude 4.5 Opus
Parameters
Undisclosed
Context Length
200K
Modality
Text
Architecture
Undisclosed
License
Proprietary
Release Date
1 Nov 2025
Knowledge Cutoff
May 2025
API Pricing (per 1M)
Input: $5.00 · Output: $25.00
Evaluation Benchmarks
Rank
#37
| Benchmark | Score | Rank |
|---|---|---|
Software Engineering | 0.79 | 🥇 1 |
StackUnseen | 0.819 | 15 |
Coding | high (32k) 0.80 | 24 |
Mathematics | high (32k) 0.90 | 34 |
Data Analysis | high (32k) 0.74 | 35 |
Graduate-Level QA | 0.87 | 36 |
General Text | high (32k) 1474 Standard 1470 | 37 44 |
General | high (32k) 0.73 | 46 |
LiveBench Average | high (32k) 0.73 | 46 |
Reasoning | high (32k) 0.80 | 49 |
Agentic Coding | high (32k) 0.40 | 55 |
Web Development | high (32k) 1494 Standard 1469 | 58 62 |
Intelligence Index | auto 0.29 Standard 0.24 | 85 124 |
Rankings
Overall Rank
#37
Coding Rank
#30
About Claude 4.5 Opus
Claude 4.5 Opus is Anthropic's high-capacity frontier model engineered for deep analytical reasoning and long-horizon autonomous workflows. It features advanced computer use and adaptive effort controls across a 200K token context window.
Technical Specifications
Architecture specifications are undisclosed for proprietary models.
Resources
About Claude 4.5
Enhanced Claude models with further improvements in reasoning, coding, and agentic capabilities. Features advanced thinking modes with adjustable effort levels (high, medium, standard) for optimal performance-latency tradeoffs. Excels at complex analysis, software development, web development, and long-context understanding. Includes thinking variants that expose reasoning process for improved transparency.