Release dates
— Claude Opus 4.5 launched with effort control. ↗
Claude Opus 4.5
Introduced effort control with stronger coding, agents, computer use, and multi-agent coordination.
MODEL NUMBER076
- First public date
- 2025-11-24
- Organization
- Anthropic
- Family
- Claude
01
Specifications
Only published specifications are shown.
- Context
- 200,000 tokens
- Input modalities
- Text · Image
- Open weights
- No
- Status
- Legacy
02
Overview
PreviousClaude Opus 4.1— · — ctx
CurrentClaude Opus 4.5— · 200K ctx
04
Architecture & capabilities
Model capabilities
Coding
Connected tools
Computer use
API features
Effort control
Product features
Multi-agent
05
Release history
Claude Opus 4.5 launched with effort control.
View source06
Related models
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07
Sources
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