Claude Opus 5.5

Specifications

No specifications recorded yet.

Latest developments

September 2026

◆ Anthropic released Claude Opus 5.5, accompanied by lower API pricing and routing of some requests to older models Model release

◆ Anthropic releases Claude Opus 5.5 with updated cybersecurity safeguards and stricter testing/API restrictions Model release

• 22 Sep Claude Opus 5.5: Anthropic Launches New Top Model Despite Calling for AI Slowdown
• 22 Sep Anthropic releases Opus 5.5 and cuts pricing by 20%. Your agent calls might secretly get routed to an older model.
• 22 Sep Anthropic launches Claude Opus 5.5 with stricter safeguards for cybersecurity

Relationships

Products & technology

• Anthropic develops this model · 2 sources
• Anthropic deploys this model · 1 source
• Artificial Analysis integrated with this model · 1 source

Partnerships

• The New Stack partnered with this model · 1 source