Class OpenAIChat

Wrapper around OpenAI large language models that use the Chat endpoint.

To use you should have the openai package installed, with the OPENAI_API_KEY environment variable set.

To use with Azure you should have the openai package installed, with the AZURE_OPENAI_API_KEY, AZURE_OPENAI_API_INSTANCE_NAME, AZURE_OPENAI_API_DEPLOYMENT_NAME and AZURE_OPENAI_API_VERSION environment variable set.

Remarks

Any parameters that are valid to be passed to openai.createCompletion can be passed through modelKwargs, even if not explicitly available on this class.

Example

const model = new OpenAIChat({
  prefixMessages: [
    {
      role: "system",
      content: "You are a helpful assistant that answers in pirate language",
    },
  ],
  maxTokens: 50,
});

const res = await model.call(
  "What would be a good company name for a company that makes colorful socks?"
);
console.log({ res });

Hierarchy

Implements

Constructors

constructor

Properties

frequencyPenalty modelName n presencePenalty streaming temperature topP azureOpenAIApiDeploymentName? azureOpenAIApiInstanceName? azureOpenAIApiKey? azureOpenAIApiVersion? azureOpenAIBasePath? logitBias? maxTokens? modelKwargs? openAIApiKey? organization? prefixMessages? stop? timeout? user?

Accessors

callKeys

Methods

completionWithRetry identifyingParams invocationParams

Constructors

constructor

  • Parameters

    • Optional fields: Partial<OpenAIChatInput> & Partial<AzureOpenAIInput> & BaseLLMParams & {
          configuration?: ClientOptions & LegacyOpenAIInput;
      }
    • Optional configuration: ClientOptions & LegacyOpenAIInput

      Deprecated

    Returns OpenAIChat

Properties

frequencyPenalty

frequencyPenalty: number = 0

Penalizes repeated tokens according to frequency

modelName

modelName: string = "gpt-3.5-turbo"

Model name to use

n

n: number = 1

Number of completions to generate for each prompt

presencePenalty

presencePenalty: number = 0

Penalizes repeated tokens

streaming

streaming: boolean = false

Whether to stream the results or not. Enabling disables tokenUsage reporting

temperature

temperature: number = 1

Sampling temperature to use

topP

topP: number = 1

Total probability mass of tokens to consider at each step

Optional azureOpenAIApiDeploymentName

azureOpenAIApiDeploymentName?: string

Azure OpenAI API deployment name to use for completions when making requests to Azure OpenAI. This is the name of the deployment you created in the Azure portal. e.g. "my-openai-deployment" this will be used in the endpoint URL: https://{InstanceName}.openai.azure.com/openai/deployments/my-openai-deployment/

Optional azureOpenAIApiInstanceName

azureOpenAIApiInstanceName?: string

Azure OpenAI API instance name to use when making requests to Azure OpenAI. this is the name of the instance you created in the Azure portal. e.g. "my-openai-instance" this will be used in the endpoint URL: https://my-openai-instance.openai.azure.com/openai/deployments/{DeploymentName}/

Optional azureOpenAIApiKey

azureOpenAIApiKey?: string

API key to use when making requests to Azure OpenAI.

Optional azureOpenAIApiVersion

azureOpenAIApiVersion?: string

API version to use when making requests to Azure OpenAI.

Optional azureOpenAIBasePath

azureOpenAIBasePath?: string

Custom endpoint for Azure OpenAI API. This is useful in case you have a deployment in another region. e.g. setting this value to "https://westeurope.api.cognitive.microsoft.com/openai/deployments" will be result in the endpoint URL: https://westeurope.api.cognitive.microsoft.com/openai/deployments/{DeploymentName}/

Optional logitBias

logitBias?: Record<string, number>

Dictionary used to adjust the probability of specific tokens being generated

Optional maxTokens

maxTokens?: number

Maximum number of tokens to generate in the completion. -1 returns as many tokens as possible given the prompt and the model's maximum context size.

Optional modelKwargs

modelKwargs?: Record<string, any>

Holds any additional parameters that are valid to pass to openai.createCompletion that are not explicitly specified on this class.

Optional openAIApiKey

openAIApiKey?: string

API key to use when making requests to OpenAI. Defaults to the value of OPENAI_API_KEY environment variable.

Optional organization

organization?: string

Optional prefixMessages

prefixMessages?: ChatCompletionMessageParam[]

ChatGPT messages to pass as a prefix to the prompt

Optional stop

stop?: string[]

List of stop words to use when generating

Optional timeout

timeout?: number

Timeout to use when making requests to OpenAI.

Optional user

user?: string

Unique string identifier representing your end-user, which can help OpenAI to monitor and detect abuse.

Accessors

callKeys

  • get callKeys(): string[]

  • Returns string[]

Methods

completionWithRetry

  • Calls the OpenAI API with retry logic in case of failures.

    Parameters

    • request: ChatCompletionCreateParamsStreaming

      The request to send to the OpenAI API.

    • Optional options: OpenAICoreRequestOptions

      Optional configuration for the API call.

    Returns Promise<AsyncIterable<ChatCompletionChunk>>

    The response from the OpenAI API.

  • Parameters

    • request: ChatCompletionCreateParamsNonStreaming
    • Optional options: OpenAICoreRequestOptions

    Returns Promise<ChatCompletion>

identifyingParams

  • Get the identifying parameters for the model

    Returns Omit<ChatCompletionCreateParams, "messages"> & {
        model_name: string;
    } & ClientOptions

invocationParams

  • Get the parameters used to invoke the model

    Parameters

    • Optional options: Omit<OpenAIChatCallOptions, never>

    Returns Omit<ChatCompletionCreateParams, "messages">

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