Sonar Reasoning Pro

Claims and evidence

• Released February 2025?No dated announcement found. The API model list does not show sonar-reasoning-pro in the capture of 2025-01-30 and does in the next capture, of 2025-02-05, so a release on 2025-01-30 or 2025-01-31 cannot be ruled out. Secondary sources giving 2025-03-07 conflict with these captures. ● Primary source[1]Supported Models table [5]Supported Models table
• Deprecated July 2026Changelog entry tagged Deprecation, labelled July 2026 (month only). The migration guide gives 2026-09-27 as the end of Sonar Chat Completions support. ● Primary source[4]July 2026: Sonar Chat Completions migration

• Status DeprecatedSonar Chat Completions support ended on 2026-09-27. Synchronous and streaming requests keep working but are being reformulated as Agent API requests, rolling out gradually by model; the migration guide maps this model to the low preset. The Agent API Models page lists no id for this model. ● Primary source[6]introduction; How Sonar Chat Completions maps to Agent API presets [4]July 2026: Sonar Chat Completions migration

• Derived from (other) DeepSeek-R1 (DeepSeek)Perplexity says it is powered by DeepSeek R1; the method is not stated. ● Primary source[7]

• Change · Other Perplexity's docs describe it as powered by DeepSeek R1 with chain of thought.Compared with Sonar Reasoning ● Primary source[2]Model descriptions: sonar-reasoning-pro
• Change · Other Has an 8k maximum output, a limit the docs state for this model and Sonar Pro but not for Sonar Reasoning.Compared with Sonar Reasoning ● Primary source[1]Supported Models table
• Change · Other Gives on average twice as many citations as Sonar Reasoning, according to Perplexity's model page.Compared with Sonar Reasoning ◐ Archived primaryOriginal source unavailable[3]

• Feature Reasoning modeOutputs a think section with reasoning tokens before the answer. ● Primary source[3]Model Type; Key Features [1]notes under the table [7]Reasoning Models
• Feature RetrievalWeb search with citations; about twice as many citations on average as Sonar Reasoning. ◐ Archived primaryOriginal source unavailable[3]Key Features
• Context window 127k tokensListed as 127k at launch with a maximum output of 8k; the model list from 2025-02-22 and the model page give 128k. ● Primary source[1]Supported Models table
• Parameters Not disclosedNot disclosed by Perplexity. No claim madeNo source
• Access API ◐ Archived primaryOriginal source unavailable[3]Test the Model

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