Perplexity

1. Overview

Perplexity AI is an AI-powered conversational search engine designed to provide users with direct and accurate answers through natural language processing.

Available model list:

• sonar

• sonar-pro

• sonar-reasoning

• sonar-reasoning-pro

• llama-3.1-sonar-small-128k-online (Discontinued on 2025/02/22)

• llama-3.1-sonar-large-128k-online (Discontinued on 2025/02/22)

• llama-3.1-sonar-huge-128k-online (Discontinued on 2025/02/22)

Note

This API is compatible with the OpenAI interface format.

2. Request Description

• Request method: POST

• Request address: https://gateway.theturbo.ai/v1/chat/completions

3. Input Parameters

3.1 Header Parameters

Parameter Name	Type	Required	Description	Example Value
Content-Type	string	Yes	Set the request header type, which must be application/json	application/json
Accept	string	Yes	Set the response type, which is recommended to be unified as application/json	application/json
Authorization	string	Yes	API_KEY required for authentication. Format: Bearer $YOUR_API_KEY	Bearer $YOUR_API_KEY

3.2 Body Parameters (application/json)

Parameter Name	Type	Required	Description	Example
model	string	Yes	The model ID to use. See available models listed in the Overview for details, such as llama-3.1-sonar-small-128k-online.	llama-3.1-sonar-small-128k-online
messages	array	Yes	Chat message list, compatible with OpenAI interface format. Each object in the array contains role and content.	[{"role": "user","content": "hello"}]
role	string	No	Message role. Optional values: system, user, assistant.	user
content	string	No	The specific content of the message.	Hello, please tell me a joke.
temperature	number	No	Sampling temperature, taking a value between 0 and 2. The larger the value, the more random the output; the smaller the value, the more concentrated and certain the output.	0.7
top_p	number	No	Another way to adjust the sampling distribution, taking a value between 0 and 1. It is usually set as an alternative to the temperature.	0.9
n	number	No	How many replies to generate for each input message.	1
stream	boolean	No	Whether to enable streaming output. When set to true, returns streaming data similar to ChatGPT.	false
max_tokens	number	No	The maximum number of tokens that can be generated in a single reply, subject to the model context length limit.	1024
presence_penalty	number	No	-2.0 ~ 2.0. A positive value encourages the model to output more new topics, while a negative value reduces the probability of outputting new topics.	0
frequency_penalty	number	No	-2.0 ~ 2.0. A positive value reduces the frequency of repeated phrases in the model, while a negative value increases the probability of repeated phrases.	0
search_recency_filter	string	No	Returns search results within the specified time range. Optional values: month, week, day, hour.	month

4. Request Example

HTTP

POST /v1/chat/completions
Content-Type: application/json
Accept: application/json
Authorization: Bearer $YOUR_API_KEY

{
	"model": "sonar",
	"messages": [
		{
			"role": "system",
			"content": "Be precise and concise."
		},
		{
			"role": "user",
			"content": "How many stars are there in our galaxy?"
		}
	],
	"max_tokens": 1024,
	"temperature": 0.2,
	"search_recency_filter": "month"
}

Shell

Go

5. Response Example

{
	"id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
	"model": "llama-3.1-sonar-small-128k-online",
	"object": "chat.completion",
	"created": 1724369245,
	"citations": [
		"https://www.astronomy.com/science/astro-for-kids-how-many-stars-are-there-in-space/",
		"https://www.esa.int/Science_Exploration/Space_Science/Herschel/How_many_stars_are_there_in_the_Universe",
		"https://www.space.com/25959-how-many-stars-are-in-the-milky-way.html",
		"https://www.space.com/26078-how-many-stars-are-there.html",
		"https://en.wikipedia.org/wiki/Milky_Way",
		"https://www.littlepassports.com/blog/space/how-many-stars-are-in-the-universe/?srsltid=AfmBOoqWVymRloolU4KZBI9-LotDIoTnzhKYKCw7vVkaIifhjrEU66_5"
	],
	"choices": [
		{
			"index": 0,
			"finish_reason": "stop",
			"message": {
				"role": "assistant",
				"content": "The number of stars in the Milky Way galaxy is estimated to be between 100 billion and 400 billion stars. The most recent estimates from the Gaia mission suggest that there are approximately 100 to 400 billion stars in the Milky Way, with significant uncertainties remaining due to the difficulty in detecting faint red dwarfs and brown dwarfs."
			},
			"delta": {
				"role": "assistant",
				"content": ""
			}
		}
	],
	"usage": {
		"prompt_tokens": 14,
		"completion_tokens": 70,
		"total_tokens": 84
	}
}