OpenAI API

CreateCompletionRequest

object
modelAny Of
required

ID of the model to use. You can use the List models API to see all of your available models, or see our Model overview for descriptions of them.

Variant 1string
promptOne Of
required

The prompt(s) to generate completions for, encoded as a string, array of strings, array of tokens, or array of token arrays.

Note that <|endoftext|> is the document separator that the model sees during training, so if a prompt is not specified the model will generate as if from the beginning of a new document.

Default:<|endoftext|>

Variant 1string

Default:

Example:This is a test.

best_ofinteger

Generates best_of completions server-side and returns the “best” (the one with the highest log probability per token). Results cannot be streamed.

When used with n, best_of controls the number of candidate completions and n specifies how many to return – best_of must be greater than n.

Note: Because this parameter generates many completions, it can quickly consume your token quota. Use carefully and ensure that you have reasonable settings for max_tokens and stop.

Default:1

>= 0<= 20

echoboolean

Echo back the prompt in addition to the completion

Default:false

frequency_penaltynumber

Number between -2.0 and 2.0. Positive values penalize new tokens based on their existing frequency in the text so far, decreasing the model’s likelihood to repeat the same line verbatim.

See more information about frequency and presence penalties.

Default:0

>= -2<= 2

logit_biasobject

Modify the likelihood of specified tokens appearing in the completion.

Accepts a JSON object that maps tokens (specified by their token ID in the GPT tokenizer) to an associated bias value from -100 to 100. You can use this tokenizer tool to convert text to token IDs. Mathematically, the bias is added to the logits generated by the model prior to sampling. The exact effect will vary per model, but values between -1 and 1 should decrease or increase likelihood of selection; values like -100 or 100 should result in a ban or exclusive selection of the relevant token.

As an example, you can pass {"50256": -100} to prevent the <|endoftext|> token from being generated.

Default:null

logprobsinteger

Include the log probabilities on the logprobs most likely output tokens, as well the chosen tokens. For example, if logprobs is 5, the API will return a list of the 5 most likely tokens. The API will always return the logprob of the sampled token, so there may be up to logprobs+1 elements in the response.

The maximum value for logprobs is 5.

Default:null

>= 0<= 5

max_tokensinteger

The maximum number of tokens that can be generated in the completion.

The token count of your prompt plus max_tokens cannot exceed the model’s context length. Example Python code for counting tokens.

Default:16

>= 0

Example:16

ninteger

How many completions to generate for each prompt.

Note: Because this parameter generates many completions, it can quickly consume your token quota. Use carefully and ensure that you have reasonable settings for max_tokens and stop.

Default:1

>= 1<= 128

Example:1

presence_penaltynumber

Number between -2.0 and 2.0. Positive values penalize new tokens based on whether they appear in the text so far, increasing the model’s likelihood to talk about new topics.

See more information about frequency and presence penalties.

Default:0

>= -2<= 2

seedinteger(int64)

If specified, our system will make a best effort to sample deterministically, such that repeated requests with the same seed and parameters should return the same result.

Determinism is not guaranteed, and you should refer to the system_fingerprint response parameter to monitor changes in the backend.

stopOne Of

Up to 4 sequences where the API will stop generating further tokens. The returned text will not contain the stop sequence.

Default:null

Variant 1string

Default:<|endoftext|>

Example:

streamboolean

Whether to stream back partial progress. If set, tokens will be sent as data-only server-sent events as they become available, with the stream terminated by a data: [DONE] message. Example Python code.

Default:false

stream_optionsobject

Options for streaming response. Only set this when you set stream: true.

Default:null

Show Child Parameters
suffixstring

The suffix that comes after a completion of inserted text.

This parameter is only supported for gpt-3.5-turbo-instruct.

Default:null

Example:test.

temperaturenumber

What sampling temperature to use, between 0 and 2. Higher values like 0.8 will make the output more random, while lower values like 0.2 will make it more focused and deterministic.

We generally recommend altering this or top_p but not both.

Default:1

>= 0<= 2

Example:1

top_pnumber

An alternative to sampling with temperature, called nucleus sampling, where the model considers the results of the tokens with top_p probability mass. So 0.1 means only the tokens comprising the top 10% probability mass are considered.

We generally recommend altering this or temperature but not both.

Default:1

>= 0<= 1

Example:1

userstring

A unique identifier representing your end-user, which can help OpenAI to monitor and detect abuse. Learn more.

Example:user-1234

Example

CreateCompletionResponse

object

Represents a completion response from the API. Note: both the streamed and non-streamed response objects share the same shape (unlike the chat endpoint).

idstringrequired

A unique identifier for the completion.

choicesarray[object]required

The list of completion choices the model generated for the input prompt.

Show Child Parameters
createdintegerrequired

The Unix timestamp (in seconds) of when the completion was created.

modelstringrequired

The model used for completion.

system_fingerprintstring

This fingerprint represents the backend configuration that the model runs with.

Can be used in conjunction with the seed request parameter to understand when backend changes have been made that might impact determinism.

objectstringrequired

The object type, which is always “text_completion”

Allowed values:text_completion

usageobject

Usage statistics for the completion request.

Show Child Parameters
Example

CreateEmbeddingRequest

object
* Additional properties are NOT allowed.
inputOne Of
required

Input text to embed, encoded as a string or array of tokens. To embed multiple inputs in a single request, pass an array of strings or array of token arrays. The input must not exceed the max input tokens for the model (8192 tokens for text-embedding-ada-002), cannot be an empty string, and any array must be 2048 dimensions or less. Example Python code for counting tokens. Some models may also impose a limit on total number of tokens summed across inputs.

Example:The quick brown fox jumped over the lazy dog

stringstring

The string that will be turned into an embedding.

Default:

Example:This is a test.

modelAny Of
required

ID of the model to use. You can use the List models API to see all of your available models, or see our Model overview for descriptions of them.

Example:text-embedding-3-small

Variant 1string
encoding_formatstring

The format to return the embeddings in. Can be either float or base64.

Allowed values:floatbase64

Default:float

Example:float

dimensionsinteger

The number of dimensions the resulting output embeddings should have. Only supported in text-embedding-3 and later models.

>= 1

userstring

A unique identifier representing your end-user, which can help OpenAI to monitor and detect abuse. Learn more.

Example:user-1234

Example

CreateEmbeddingResponse

object
dataarray[object]required

Represents an embedding vector returned by embedding endpoint.

Show Child Parameters
modelstringrequired

The name of the model used to generate the embedding.

objectstringrequired

The object type, which is always “list”.

Allowed values:list

usageobjectrequired

The usage information for the request.

Show Child Parameters
Example

CreateFileRequest

object
* Additional properties are NOT allowed.
filestring(binary)required

The File object (not file name) to be uploaded.

purposestringrequired

The intended purpose of the uploaded file.

Use “assistants” for Assistants and Message files, “vision” for Assistants image file inputs, “batch” for Batch API, and “fine-tune” for Fine-tuning.

Allowed values:assistantsbatchfine-tunevision

Example