> ## Documentation Index
> Fetch the complete documentation index at: https://docs.perplexity.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Models

> Compare Sonar, Sonar Pro, Sonar Reasoning Pro, and Sonar Deep Research models for the Sonar API.

# Models

> [!WARNING]
>
> Sonar Chat Completions has been replaced by the [Agent API](https://docs.perplexity.ai/docs/agent-api/quickstart.md). This page is kept for customers with continued Sonar access. Migration guide [here](https://docs.perplexity.ai/docs/agent-api/migrate-from-sonar/overview.md).

### Explore the Sonar range and compare models

![Sonar Range](https://mintcdn.com/perplexity/qLnd99sJyTqU60Ni/docs/assets/models/modelgraph.png?fit=max\&auto=format\&n=qLnd99sJyTqU60Ni\&q=85\&s=7783c052f9684bfd9edf7026b49aee26)

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## Search

Models designed to retrieve and synthesize information efficiently.

Best suited for quick factual queries, topic summaries, product comparisons, and current events where simple information retrieval and synthesis is needed without complex reasoning.

Not ideal for multi-step analyses, exhaustive research on broad topics, or projects requiring detailed instructions or comprehensive reports across multiple sources.

sonar

Sonar

Lightweight, cost-effective search model with grounding.

[Open](https://docs.perplexity.ai/docs/legacy/sonar/models/sonar)

sonar pro

Sonar Pro

Advanced search offering with grounding, supporting complex queries and follow-ups.

[Open](https://docs.perplexity.ai/docs/legacy/sonar/models/sonar-pro)

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## Reasoning

Models that excel at complex, multi-step tasks.

Excellent for complex analyses requiring step-by-step thinking, tasks needing strict adherence to instructions, information synthesis across sources, and logical problem-solving that demands informed recommendations.

Not recommended for simple factual queries, basic information retrieval, exhaustive research projects (use Research models instead), or when speed takes priority over reasoning quality.

sonar reasoning pro

Sonar Reasoning Pro

Precise reasoning offering with Chain of Thought (CoT).

[Open](https://docs.perplexity.ai/docs/legacy/sonar/models/sonar-reasoning-pro)

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## Research

Models that conduct in-depth analysis and generate detailed reports.

Ideal for comprehensive topic reports, in-depth analysis with exhaustive web research, and projects requiring synthesis of multiple information sources into cohesive reports like market analyses or literature reviews.

sonar deep research

Sonar Deep Research

Expert-level research model conducting exhaustive searches and generating comprehensive reports.

[Open](https://docs.perplexity.ai/docs/legacy/sonar/models/sonar-deep-research)