Perplexity-Sonar-Rsn-Pro | EmpirioLabs AI Docs

Provider: Perplexity
Category: Research & Search
Endpoint: POST /v1/search
Context window: 128K
Served from: —

Reasoning model on the uncensored open-source R1-1776 with web search, outperforming leading search engines and LLMs on the SimpleQA benchmark.

At a glance

Field	Value
Model id	`perplexity-sonar-rsn-pro`
Input modalities	text
Output modalities	text
Context window	128K
Region	—
Features	web_search, reasoning
New	No
Native inference	No

Pricing

Charge	Spec	Rate
Base Fee (Low Context)	per request	$0.014
Base Fee (Medium Context)	per request	$0.024
Base Fee (High Context)	per request	$0.034
Input Tokens	per 1k tokens	$0.0048
Output Tokens	per 1k tokens	$0.019

Example request

$ curl https://api.empiriolabs.ai/v1/search \
>   -H 'Authorization: Bearer $EMPIRIOLABS_API_KEY' \
>   -H 'Content-Type: application/json' \
>   -d '{"model": "perplexity-sonar-rsn-pro", "query": "latest LLM benchmarks 2026"}'

Parameters

Parameter	Type	Required	Default	Description
`reasoning_effort`	enum	no	`"high"`	low: fast, less reasoning. medium: balanced. high: maximum reasoning depth. · Allowed: `low`, `medium`, `high`
`stream_mode`	enum	no	`"concise"`	concise: only final answer streams. full: stream the reasoning trace too. · Allowed: `concise`, `full`
`search_context_size`	enum	no	`"medium"`	low\|medium\|high — drives base fee tier and result depth. · Allowed: `low`, `medium`, `high`
`search_mode`	enum	no	`"default"`	Filter source type. · Allowed: `default`, `academic`, `sec`
`search_recency_filter`	enum	no	`"none"`	Restrict to results from the last N. Use ‘none’ to disable. · Allowed: `none`, `day`, `week`, `month`, `year`
`search_after_date`	string	no	—	Publication date filter (MM/DD/YYYY).
`search_before_date`	string	no	—	Publication date filter (MM/DD/YYYY).
`last_updated_after_filter`	string	no	—	Last-modified filter (MM/DD/YYYY).
`last_updated_before_filter`	string	no	—	Last-modified filter (MM/DD/YYYY).
`search_language_filter`	string	no	—	Comma-separated ISO-639-1 language codes (max 10).
`search_domain_filter`	string	no	—	Comma-separated allowlist. Prefix with - to deny.
`country`	string	no	—	ISO alpha-2 country.
`region`	string	no	—	Region/state.
`city`	string	no	—	City.
`latitude`	number	no	—	Latitude for user-location bias.
`longitude`	number	no	—	Longitude for user-location bias.
`return_citations`	boolean	no	true	Include citations array.
`return_related_questions`	boolean	no	false	Include suggested follow-ups.
`temperature`	number	no	`0.2`	Sampling temperature. · Range: 0 – 2
`top_p`	number	no	`0.9`	Nucleus sampling. · Range: 0 – 1
`max_tokens`	number	no	`8192`	Max output tokens. · Range: 1 – 32768
`disable_formatting`	boolean	no	false	Return raw upstream response.

Live machine-readable schema is also available at GET https://api.empiriolabs.ai/v1/models/perplexity-sonar-rsn-pro.