Anthropic
Claude Opus 4.1
anthropic/claude-opus-4.1
Earlier Opus. The most expensive Claude here; newer Opus models cost less.
TextImages, Text, Files → TextReady on endue
- Coding
- Reasoning
Overview
Good for
Written by endue
- Coding
- Reasoning
Not ideal for
From the model’s specs
Nothing in the specs rules out common agent work.
Capabilities
| Tool use | Supported |
|---|---|
| Structured output | Not supported |
| JSON mode | Not supported |
| Reasoning | Supported |
| Vision | Supported |
| Audio input | Not supported |
| Video input | Not supported |
| File input | Supported |
| Long context | Supported |
Specifications
- Model ID
anthropic/claude-opus-4.1- Family
- Claude Opus
- Context window
- 200K tokens
- Input
- Images, Text, Files
- Output
- Text