Reasoning model that researches over several rounds of web search, chaining evidence across many sources before it answers, with inline citations.
PerplexityResearch & Search128K contextProprietary EndpointReasoning model that researches over several rounds of web search, chaining evidence across many sources before it answers, with inline citations.
Also known as Perplexity Sonar Reasoning
perplexity-sonar-reasoning-pro/v1/chat/completionsPOST/v1/responsesPOST/v1/messagesPOST/v1/searchPOST/v1beta/models/perplexity-sonar-reasoning-pro:generateContentperplexity/sonar-reasoning-proLive pay-as-you-go rates from the EmpirioLabs catalog. You are billed only for what you use, with no monthly minimum.
Perplexity Sonar Reasoning Pro serves the OpenAI-compatible Chat Completions API. Point any OpenAI SDK at https://api.empiriolabs.ai/v1 with your EmpirioLabs API key and use the model id perplexity-sonar-reasoning-pro. Get an API key from the EmpirioLabs dashboard.
curl https://api.empiriolabs.ai/v1/chat/completions \
-H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "perplexity-sonar-reasoning-pro",
"messages": [
{"role": "user", "content": "Write a haiku about the ocean."}
]
}'from openai import OpenAI
client = OpenAI(
base_url="https://api.empiriolabs.ai/v1",
api_key="YOUR_EMPIRIOLABS_API_KEY",
)
response = client.chat.completions.create(
model="perplexity-sonar-reasoning-pro",
messages=[{"role": "user", "content": "Write a haiku about the ocean."}],
)
print(response.choices[0].message.content)Request parameters supported by the Perplexity Sonar Reasoning Pro API on EmpirioLabs. Defaults apply when a field is omitted.
| Parameter | Type | Default | Range / values | Description |
|---|---|---|---|---|
| max_tokens | number | 8192 | 1 to 32768 | Maximum tokens in the response. |
| reasoning_effort | enum | medium | low, medium, high | How much the model reasons before it answers. Higher is more thorough and slower. |
| search_context_size | enum | medium | low, medium, high | Higher context gives better answers but increases the base fee per request. |
| search_mode | enum | default | default, academic, sec | Filter search results by source type. Academic limits search to scholarly publishers. SEC adds financial filings and company data. |
| search_domain_filter | string | - | - | Comma-separated domains. Prefix with '-' to exclude. Max 20. |
| max_results | number | 15 | 1 to 50 | Most results each web search returns. More results give more sources to draw on. |
| search_after_date | string | - | - | Use MM/DD/YYYY or YYYY-MM-DD. Only include sources after this date. |
| search_before_date | string | - | - | Use MM/DD/YYYY or YYYY-MM-DD. Only include sources before this date. |
| search_recency_filter | enum | none | none, hour, day, week, month, year | Relative time filter. Cannot be combined with specific dates. |
| last_updated_after_filter | string | - | - | Use MM/DD/YYYY or YYYY-MM-DD. Only include sources after this date. |
| last_updated_before_filter | string | - | - | Use MM/DD/YYYY or YYYY-MM-DD. Only include sources before this date. |
| country | string | - | - | Two-letter ISO 3166-1 code (e.g. US, GB) for biasing results to a country. |
| region | string | - | - | State or province name for location bias. |
| city | string | - | - | City name for location bias. |
On EmpirioLabs, Perplexity Sonar Reasoning Pro is billed pay as you go: Input $4.80 per 1M prompt tokens; Output $19.00 per 1M generated tokens; Base Fee (Low Context) $0.014 per request; Base Fee (Medium Context) $0.024 per request; Base Fee (High Context) $0.034 per request. The live rate card on this page always matches what the API charges.
Perplexity Sonar Reasoning Pro supports a 128K-token context window.
Yes. Perplexity Sonar Reasoning Pro serves the OpenAI-compatible Chat Completions API, so existing OpenAI SDKs work by pointing base_url at https://api.empiriolabs.ai/v1 and setting the model id to perplexity-sonar-reasoning-pro.
Yes. The EmpirioLabs playground runs Perplexity Sonar Reasoning Pro in the browser with the same parameters the API exposes, so you can test prompts before writing code.
Create an EmpirioLabs account, then generate a key under API Keys in the dashboard. Billing is pay-as-you-go credits, so you only pay for the requests you make.
Check out our pricing or reach out if you want your own model deployed on our stack.
