OpenAI API | Beta › Assistants

AssistantResponseFormatOption

post/assistants

Create an assistant with a model and instructions.

Security

Bearer Auth

Example: Authorization: Bearer My API Key

Body parameters

model: string |

ChatModel

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.

description?: string

The description of the assistant. The maximum length is 512 characters.

instructions?: string

The system instructions that the assistant uses. The maximum length is 256,000 characters.

metadata?: unknown

Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format. Keys can be a maximum of 64 characters long and values can be a maximum of 512 characters long.

name?: string

The name of the assistant. The maximum length is 256 characters.

response_format?:

Specifies the format that the model must output. Compatible with GPT-4o, GPT-4 Turbo, and all GPT-3.5 Turbo models since gpt-3.5-turbo-1106.

Setting to { "type": "json_schema", "json_schema": {...} } enables Structured Outputs which ensures the model will match your supplied JSON schema. Learn more in the Structured Outputs guide.

Setting to { "type": "json_object" } enables JSON mode, which ensures the message the model generates is valid JSON.

Important: when using JSON mode, you must also instruct the model to produce JSON yourself via a system or user message. Without this, the model may generate an unending stream of whitespace until the generation reaches the token limit, resulting in a long-running and seemingly "stuck" request. Also note that the message content may be partially cut off if finish_reason="length", which indicates the generation exceeded max_tokens or the conversation exceeded the max context length.

temperature?: number

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.

tool_resources?: { code_interpreter, file_search }

A set of resources that are used by the assistant's tools. The resources are specific to the type of tool. For example, the code_interpreter tool requires a list of file IDs, while the file_search tool requires a list of vector store IDs.

tools?: Array<

AssistantTool

A list of tool enabled on the assistant. There can be a maximum of 128 tools per assistant. Tools can be of types code_interpreter, file_search, or function.

top_p?: number

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.

Response fields

Request example

curl https://api.openai.com/v1/assistants \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $OPENAI_API_KEY" \
    -d '{
      "model": "gpt-4o",
      "temperature": 1,
      "top_p": 1
    }'

200Example

{
  "id": "id",
  "created_at": 0,
  "description": "description",
  "instructions": "instructions",
  "metadata": {},
  "model": "model",
  "name": "name",
  "object": "assistant",
  "tools": [
    {
      "type": "code_interpreter"
    }
  ],
  "response_format": "auto",
  "temperature": 1,
  "tool_resources": {
    "code_interpreter": {
      "file_ids": [
        "string"
      ]
    },
    "file_search": {
      "vector_store_ids": [
        "string"
      ]
    }
  },
  "top_p": 1
}

Delete Assistant ->

AssistantDeleted

delete/assistants/{assistant_id}

Delete an assistant.

List Assistants -> CursorPage<

get/assistants

Returns a list of assistants.

Retrieve Assistant ->

get/assistants/{assistant_id}

Retrieves an assistant.

Modify Assistant ->

post/assistants/{assistant_id}

Modifies an assistant.

Domain types

Assistant = { id, created_at, description, 10 more... }

AssistantDeleted = { id, deleted, object }

AssistantStreamEvent = { data, event, enabled } | { data, event } | { data, event } | 21 more...

AssistantTool =

CodeInterpreterTool

FileSearchTool

FunctionTool

CodeInterpreterTool = { type }

FileSearchTool = { type, file_search }

FunctionTool = { function, type }

MessageStreamEvent = { data, event } | { data, event } | { data, event } | 2 more...

RunStepStreamEvent = { data, event } | { data, event } | { data, event } | 4 more...

RunStreamEvent = { data, event } | { data, event } | { data, event } | 7 more...

ThreadStreamEvent = { data, event, enabled }

Beta

Threads

beta.threads

Methods

Create Thread ->

Thread

post/threads

Create a thread.

Create Thread And Run ->

post/threads/runs

Create a thread and run it in one request.

Delete Thread ->

ThreadDeleted

delete/threads/{thread_id}

Delete a thread.

Retrieve Thread ->

Thread

get/threads/{thread_id}

Retrieves a thread.

Modify Thread ->

Thread

post/threads/{thread_id}

Modifies a thread.

Domain types

AssistantResponseFormatOption = "auto" |

ResponseFormatText

ResponseFormatJSONObject

| 1 more...

AssistantToolChoice = { type, function }

AssistantToolChoiceFunction = { name }

AssistantToolChoiceOption = "none" | "auto" | "required" |

AssistantToolChoice

Thread = { id, created_at, metadata, 2 more... }

ThreadDeleted = { id, deleted, object }

Beta Threads

Messages

beta.threads.messages

Methods

Create Message ->

post/threads/{thread_id}/messages

Create a message.

Delete Message ->

MessageDeleted

delete/threads/{thread_id}/messages/{message_id}

Deletes a message.

List Messages -> CursorPage<

get/threads/{thread_id}/messages

Returns a list of messages for a given thread.

Retrieve Message ->

get/threads/{thread_id}/messages/{message_id}

Retrieve a message.

Modify Message ->

FileCitationDeltaAnnotation

post/threads/{thread_id}/messages/{message_id}

Modifies a message.

Domain types

Annotation =

FileCitationAnnotation

FilePathAnnotation

AnnotationDelta =

FilePathDeltaAnnotation

FileCitationAnnotation = { end_index, file_citation, start_index, 2 more... }

FileCitationDeltaAnnotation = { index, type, end_index, 3 more... }

FilePathAnnotation = { end_index, file_path, start_index, 2 more... }

FilePathDeltaAnnotation = { index, type, end_index, 3 more... }

ImageFile = { file_id, detail }

ImageFileContentBlock = { image_file, type }

ImageFileDelta = { detail, file_id }

ImageFileDeltaBlock = { index, type, image_file }

ImageURL = { url, detail }

ImageURLContentBlock = { image_url, type }

ImageURLDelta = { detail, url }

ImageURLDeltaBlock = { index, type, image_url }

Message = { id, assistant_id, attachments, 11 more... }

MessageContent =

ImageFileContentBlock

ImageURLContentBlock

TextContentBlock

| 1 more...

MessageContentDelta =

ImageFileDeltaBlock

TextDeltaBlock

RefusalDeltaBlock

| 1 more...

MessageContentPartParam =

ImageFileContentBlock

ImageURLContentBlock

TextContentBlockParam

MessageDeleted = { id, deleted, object }

MessageDelta = { content, role }

MessageDeltaEvent = { id, delta, object }

RefusalContentBlock = { refusal, type }

RefusalDeltaBlock = { index, type, refusal }

Text = { annotations, value }

TextContentBlock = { text, type }

TextContentBlockParam = { text, type }

TextDelta = { annotations, value }

TextDeltaBlock = { index, type, text }

Beta Threads

Runs

beta.threads.runs

Methods

Cancel A Run ->

post/threads/{thread_id}/runs/{run_id}/cancel

Cancels a run that is in_progress.

Create Run ->

post/threads/{thread_id}/runs

Create a run.

List Runs -> CursorPage<

get/threads/{thread_id}/runs

Returns a list of runs belonging to a thread.

Retrieve Run ->

get/threads/{thread_id}/runs/{run_id}

Retrieves a run.

Submit Tool Outputs To Run ->

post/threads/{thread_id}/runs/{run_id}/submit_tool_outputs

When a run has the status: "requires_action" and required_action.type is submit_tool_outputs, this endpoint can be used to submit the outputs from the tool calls once they're all completed. All outputs must be submitted in a single request.

Modify Run ->

CodeInterpreterToolCallDelta

post/threads/{thread_id}/runs/{run_id}

Modifies a run.

Domain types

RequiredActionFunctionToolCall = { id, function, type }

Run = { id, assistant_id, cancelled_at, 24 more... }

RunStatus = "queued" | "in_progress" | "requires_action" | 6 more...

Beta Threads Runs

Steps

beta.threads.runs.steps

Methods

List Run Steps -> CursorPage<

RunStep

get/threads/{thread_id}/runs/{run_id}/steps

Returns a list of run steps belonging to a run.

Retrieve Run Step ->

RunStep

get/threads/{thread_id}/runs/{run_id}/steps/{step_id}

Retrieves a run step.

Domain types

CodeInterpreterLogs = { index, type, logs }

CodeInterpreterOutputImage = { index, type, image }

CodeInterpreterToolCall = { id, code_interpreter, type }

CodeInterpreterToolCallDelta = { index, type, id, 1 more... }

FileSearchToolCall = { id, file_search, type }

FileSearchToolCallDelta = { file_search, index, type, 1 more... }

FunctionToolCall = { id, function, type }

FunctionToolCallDelta = { index, type, id, 1 more... }

MessageCreationStepDetails = { message_creation, type }

RunStep = { id, assistant_id, cancelled_at, 13 more... }

RunStepDelta = { step_details }

RunStepDeltaEvent = { id, delta, object }

RunStepDeltaMessageDelta = { type, message_creation }

RunStepInclude = "step_details.tool_calls[*].file_search.results[*].content"

ToolCall =

CodeInterpreterToolCall

FileSearchToolCall

FunctionToolCall

ToolCallDelta =

FileSearchToolCallDelta

FunctionToolCallDelta

ToolCallDeltaObject = { type, tool_calls }

ToolCallsStepDetails = { tool_calls, type }

Beta

Vector Stores

beta.vector_stores

Methods

Create Vector Store ->

post/vector_stores

Create a vector store.

Delete Vector Store ->

VectorStoreDeleted

delete/vector_stores/{vector_store_id}

Delete a vector store.

List Vector Stores -> CursorPage<

get/vector_stores

Returns a list of vector stores.

Retrieve Vector Store ->

get/vector_stores/{vector_store_id}

Retrieves a vector store.

Modify Vector Store ->

StaticFileChunkingStrategyObject

post/vector_stores/{vector_store_id}

Modifies a vector store.

Domain types

AutoFileChunkingStrategyParam = { type }

FileChunkingStrategy =

OtherFileChunkingStrategyObject

FileChunkingStrategyParam =

AutoFileChunkingStrategyParam

StaticFileChunkingStrategyParam

OtherFileChunkingStrategyObject = { type }

StaticFileChunkingStrategy = { chunk_overlap_tokens, max_chunk_size_tokens }

StaticFileChunkingStrategyObject = { static, type }

StaticFileChunkingStrategyParam = { static, type }

VectorStore = { id, created_at, file_counts, 8 more... }

VectorStoreDeleted = { id, deleted, object }

Beta Vector Stores

File Batches

beta.vector_stores.file_batches

Methods

Cancel Vector Store File Batch ->

VectorStoreFileBatch

post/vector_stores/{vector_store_id}/file_batches/{batch_id}/cancel

Cancel a vector store file batch. This attempts to cancel the processing of files in this batch as soon as possible.

Create Vector Store File Batch ->

VectorStoreFileBatch

post/vector_stores/{vector_store_id}/file_batches

Create a vector store file batch.

List Vector Store Files In A Batch -> CursorPage<

get/vector_stores/{vector_store_id}/file_batches/{batch_id}/files

Returns a list of vector store files in a batch.

Retrieve Vector Store File Batch ->

VectorStoreFileBatch

get/vector_stores/{vector_store_id}/file_batches/{batch_id}

Retrieves a vector store file batch.

Domain types

VectorStoreFileBatch = { id, created_at, file_counts, 3 more... }

Beta Vector Stores

Files

beta.vector_stores.files

Methods

Create Vector Store File ->

post/vector_stores/{vector_store_id}/files

Create a vector store file by attaching a File to a vector store.

Delete Vector Store File ->

VectorStoreFileDeleted

delete/vector_stores/{vector_store_id}/files/{file_id}

Delete a vector store file. This will remove the file from the vector store but the file itself will not be deleted. To delete the file, use the delete file endpoint.

List Vector Store Files -> CursorPage<

get/vector_stores/{vector_store_id}/files

Returns a list of vector store files.

Retrieve Vector Store File ->