Agent API: One place to build with LLMs, the web, and agents

Perplexity is transitioning Sonar customers to its Agent API, a unified programmable endpoint for web search, URL retrieval, code execution, MCP connections, and finance and people search, with tools composed dynamically through its Search as Code architecture. The API replaces Sonar’s fixed model tiers with configurable presets ranging from fast to wide-research, each combining a model, system prompt, tool settings, reasoning effort, and token budgets that can be updated as frontier models improve while allowing parameter overrides. Perplexity says benchmark testing shows the presets deliver higher quality at lower costs, including an approximately sevenfold BrowseComp improvement for the low preset over Sonar Pro at about $0.05 per query, while potentially matching Sonar Deep Research more cheaply. Existing Sonar models map to corresponding presets, with xhigh adding support for more open-ended agentic tasks, and users are advised to migrate because Sonar endpoints will retire on September 27, 2026, though customers with contractual commitments retain access through their current terms.

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