Perplexity Sonar Reasoning Pro
Perplexity · Research & Search
POST /v1/chat/completionsReasoning model that researches over several rounds of web search, chaining evidence across many sources before it answers, with inline citations.
At a glance
| Field | Value |
|---|---|
| Model id | perplexity-sonar-reasoning-pro |
| Model release date | - |
| Input modalities | Text, Image, Document |
| Output modalities | Text |
| Context window | 128K |
| Weight precision | - |
| Max output tokens | 131,072 |
| Features | web_search, reasoning |
| Native inference | No |
| New | No |
| Supported endpoints | POST /v1/chat/completions, POST /v1/responses, POST /v1/messages, POST /v1/search, POST /v1beta/models/perplexity-sonar-reasoning-pro:generateContent |
| Alternate model ids | perplexity/sonar-reasoning-pro |
Pricing
| Charge | Spec | Rate |
|---|---|---|
| Input | per 1M prompt tokens | $4.80 |
| Output | per 1M generated tokens | $19.00 |
| Base Fee (Low Context) | per request | $0.014 |
| Base Fee (Medium Context) | per request | $0.024 |
| Base Fee (High Context) | per request | $0.034 |
Example request
curl https://api.empiriolabs.ai/v1/search \-H 'Authorization: Bearer $EMPIRIOLABS_API_KEY' \-H 'Content-Type: application/json' \-d '{"model": "perplexity-sonar-reasoning-pro", "query": "latest LLM benchmarks 2026"}'
Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
max_tokens | number | no | - | Maximum tokens in the response, at least 16. When omitted, the model’s own default applies. · Range: 16 – 131072 |
reasoning_effort | enum | no | "medium" | How much the model reasons before it answers. Higher is more thorough and slower. · Allowed: low, medium, high |
search_context_size | enum | no | "medium" | Higher context gives better answers but increases the base fee per request. · Allowed: low, medium, high |
search_mode | enum | no | "default" | Filter search results by source type. Academic limits search to scholarly publishers. SEC adds financial filings and company data. · Allowed: default, academic, sec |
search_domain_filter | string | no | - | Comma-separated domains. Prefix with ’-’ to exclude. Max 20. |
max_results | number | no | 15 | Most results each web search returns. More results give more sources to draw on. · Range: 1 – 50 |
search_after_date | string | no | - | Only include sources published after this date. Use MM/DD/YYYY or YYYY-MM-DD. |
search_before_date | string | no | - | Only include sources published before this date. Use MM/DD/YYYY or YYYY-MM-DD. |
search_recency_filter | enum | no | "none" | Relative time filter. Cannot be combined with specific dates. · Allowed: none, hour, day, week, month, year |
last_updated_after_filter | string | no | - | Only include sources last updated after this date. Use MM/DD/YYYY or YYYY-MM-DD. |
last_updated_before_filter | string | no | - | Only include sources last updated before this date. Use MM/DD/YYYY or YYYY-MM-DD. |
country | string | no | - | Two-letter ISO 3166-1 code (e.g. US, GB) for biasing results to a country. |
region | string | no | - | State or province name for location bias. |
city | string | no | - | City name for location bias. |
latitude | number | no | - | Latitude for location bias, in decimal degrees. |
longitude | number | no | - | Longitude for location bias, in decimal degrees. |
disable_formatting | boolean | no | false | Skip the EmpirioLabs Markdown formatting (citation [N] rewriting + References block + Images / Videos blocks + <think> extraction to reasoning_content). Raw mode keeps the <think>…</think> tags inside content; structured search_results / citations still pass through. |
Machine-readable schema: GET https://api.empiriolabs.ai/v1/models/perplexity-sonar-reasoning-pro.