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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 reasoning benchmarks, and improved robustness to prompt injection. The model is designed to operate efficiently across varied effort levels, enabling developers to trade off speed, depth, and token usage depending on task requirements. It comes with a new parameter to control token efficiency, which can be accessed using the OpenRouter Verbosity parameter with low, medium, or high. Opus 4.5 supports advanced tool use, extended context management, and coordinated multi-agent setups, making it well-suited for autonomous research, debugging, multi-step planning, and spreadsheet/browser manipulation. It delivers substantial gains in structured reasoning, execution reliability, and alignment compared to prior Opus generations, while reducing token overhead and improving performance on long-running tasks.
Quality Index
43.1
27th of 444
Top 6%
Coding Index
42.9
19th of 354
Top 5%
Math Index
62.7
111th of 268
Top 41%
Price/1M
$10.00
656th cheapest
3233% above median
Top 97%
Speed
59 tok/s
Top 42%
TTFT
1.35s
Context Window
200K
108th largest
Top 37%
Input
$5.00
per 1M tokens
Output
$25.00
per 1M tokens
Blended
$10.00
per 1M tokens
Cheaper than 3% of models. Median price is $0.30/1M tokens.
Daily
$10.00
Monthly
$300.00
59
tokens/sec
Faster than 58% of models
1.35
seconds
Faster than 21% of models
1.35
seconds
Faster than 33% of models
Market Median
45 tok/s
30% faster
Median TTFT
0.42s
224% slower
Throughput/Dollar
6
tok/s per $/1M
Speed Comparison
Context Window
200K
tokens
Larger than 63% of models
Max Output
64K
tokens
32% of context