Claims and evidence
- Released No dated announcement found. The API model list does not show sonar-reasoning in the capture of 2025-01-28 and does in the capture of 2025-01-30. Secondary sources give 2025-01-29, which no Perplexity source confirms. Primary source[1]Supported Models table [3]Supported Models table
- Retired The changelog says the model was deprecated and removed from the API as of this date; no earlier deprecation notice was found. Primary source[2]December 2025: Model Deprecation: sonar-reasoning Removed
- Status Retired Primary source[2]December 2025: Model Deprecation: sonar-reasoning Removed
- Replaced by Sonar Reasoning ProThe changelog recommends migrating to sonar-reasoning-pro. Primary source[2]December 2025: Model Deprecation: sonar-reasoning Removed
- Change · Reasoning Adds chain-of-thought reasoning, returned in the response, on top of Sonar's web search with citations.Compared with Sonar Primary source[1]Supported Models table
- Feature Reasoning modeA reasoning model that outputs its chain of thought in the response. Primary source[4]Model Type; Key Features [1]notes under the table
- Feature RetrievalReal-time web search with citations. Archived primaryOriginal source unavailable[4]Key Features
- Context window 127k tokensListed as 127k at launch; later model lists 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[4]Try it out
Lineage
Predecessors
No known predecessor.
Successors
No known successor.
Based on
Not derived from another model.
Variants and derived
None recorded.
Siblings
None recorded.
All ancestors
None.
All descendants
None.
Variants
No variants recorded in this record.
Related AI Radar coverage
AI Radar coverage starts in June 2026; no coverage linked yet.