#5
Claude Opus 4.5
claude-opus-4-5-20251101

Claude Opus 4.1 is a frontier-scale model from Anthropic designed for demanding reasoning, coding, and long-context analysis workloads. It delivers highly helpful and precise responses, with particularly strong instruction-following and comprehension that make it well-suited for complex software, research, and legal tasks. The model also provides strong creative writing capabilities and can navigate sensitive conversations with solid empathy, though it typically trades speed and cost efficiency for depth and reliability compared to newer mid-sized models.

Performance Metrics

Helpfulness
Instruction Following
Comprehension
Empathy
Creative Writing
90.38
Helpfulness
90.5
Empathy
90.66
Instruction Following
95.35
Creative Writing
81.6
Comprehension
93.81
Speed
Avg 60 tok/s

Model Specifications

Release Date
November 24, 2025
Lab
Anthropic
Type
Proprietary
Context Size
200K
Max Output Tokens
64K
Cost per 1M tokens
$5.00 / $25.00
Model Inputs
Text, Images
Model Outputs
Text
Tool Calling
Enabled

Compare With Similar Models