Overview
Strengthened long-running coding, computer use, and complex agents alongside the Claude Agent SDK.
Claude Sonnet 4.5
Strengthened long-running coding, computer use, and complex agents alongside the Claude Agent SDK.
MODEL NUMBER047
- Release date
- 2025-09-29
- Organization
- Anthropic
- Family
- Claude
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Specifications
Only published specifications are shown.
02
Overview
PreviousClaude Sonnet 4— · 200K ctx
CurrentClaude Sonnet 4.5— · 200K ctx
New capabilities Long-horizon agent Computer use Memory
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Architecture & capabilities
Key capabilities
Long-horizon agentComputer useCodingMemory
05
Release history
Claude Sonnet 4.5 launched.
View source06
Related models
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