Sonar Reasoning Pro
Sonar Reasoning Pro combines the deepest web retrieval in the Sonar family with chain-of-thought reasoning to return well-sourced, structured answers within a context window of 127K tokens.
import { streamText } from 'ai'
const result = streamText({ model: 'perplexity/sonar-reasoning-pro', prompt: 'Why is the sky blue?'})What To Consider When Choosing a Provider
Zero Data Retention
AI Gateway does not currently support Zero Data Retention for this model. See the documentation for models that support ZDR.Authentication
AI Gateway authenticates requests using an API key or OIDC token. You do not need to manage provider credentials directly.
Sonar Reasoning Pro has the highest per-token cost and longest response times in the Sonar family. Use AI Gateway's cost tracking and latency monitoring to profile requests. Confirm the quality gain matches your budget. Web search calls bill separately (N/A per thousand when listed for this model).
When to Use Sonar Reasoning Pro
Best For
Deep research and analysis:
Requires both broad source retrieval and multi-step logical reasoning over the evidence
Strategic decision support:
Analysis quality depends on both the breadth of sources consulted and the rigor of reasoning applied
Complex competitive intelligence:
Needs to reconcile conflicting information from multiple sources into one assessment
Policy and regulatory analysis:
Requires structured reasoning across evolving standards, guidelines, and jurisdictional differences
High-stakes factual analysis:
Thoroughness of both retrieval and reasoning affects decision quality
Consider Alternatives When
Straightforward queries:
Base Sonar or Sonar Pro answer faster at lower cost without deep reasoning
Hard latency constraints:
Combined deep search and reasoning produces the longest response times in the Sonar family
Tight per-request budget:
Broad retrieval and extended reasoning generate the most output tokens
Closed-domain problems:
A standalone reasoning model fits better when no web grounding is needed
Conclusion
Sonar Reasoning Pro fits when both the breadth of evidence and the depth of reasoning drive answer quality. It brings Perplexity's search and reasoning capability into one API call. It's the Sonar option with the most combined retrieval and reasoning depth for research, analysis, and decision support.
FAQ
Sonar Reasoning Pro combines Pro-level deep web retrieval (more sources) with chain-of-thought reasoning. Standard Sonar Reasoning uses base-level retrieval with reasoning. The Pro variant goes further on both search and deliberation.
Sonar Reasoning Pro integrates search, retrieval, source evaluation, reasoning, and cited answer generation into a single API call. This cuts latency and operational complexity versus wiring separate services. The model is tuned to reason over its own search results.
Competitive intelligence, regulatory research, technical due diligence, and strategic analysis when the answer depends on reasoning across many sources. It fits questions that need both broad retrieval and structured analysis.
127K tokens. This supports extended multi-turn research sessions where prior search results and reasoning inform subsequent queries.
Pricing appears on this page and updates as providers adjust their rates. AI Gateway routes traffic through the configured provider.
Use your AI Gateway API key with the model identifier `perplexity/sonar-reasoning-pro`. AI Gateway handles provider routing and authentication. You don't need a separate Perplexity API key when using gateway-managed access.
Yes. The chain-of-thought reasoning trace appears in the response. It shows how the model analyzed and connected information from the retrieved sources to reach its conclusion.
