From the source

Sonar Chat Completions migration

API release

Sonar Chat Completions has been renamed to Agent API, with added models, tools, and research-backed presets.

From the source
More models, tools, and research-backed presets: Sonar Chat Completions is now Agent API.
docs.perplexity.ai

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Visit source ↗docs.perplexity.ai

Claude Haiku 5.5

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