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Foundation Models Text Generation API, gRPC: TextGenerationService.Completion

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Updated at November 7, 2024

A method for generating text completions in synchronous mode.

gRPC request

rpc Completion (CompletionRequest) returns (stream CompletionResponse)

CompletionRequest

{
  "modelUri": "string",
  "completionOptions": {
    "stream": "bool",
    "temperature": "google.protobuf.DoubleValue",
    "maxTokens": "google.protobuf.Int64Value"
  },
  "messages": [
    {
      "role": "string",
      // Includes only one of the fields `text`, `toolCallList`, `toolResultList`
      "text": "string",
      "toolCallList": {
        "toolCalls": [
          {
            // Includes only one of the fields `functionCall`
            "functionCall": {
              "name": "string",
              "arguments": "google.protobuf.Struct"
            }
            // end of the list of possible fields
          }
        ]
      },
      "toolResultList": {
        "toolResults": [
          {
            // Includes only one of the fields `functionResult`
            "functionResult": {
              "name": "string",
              // Includes only one of the fields `content`
              "content": "string"
              // end of the list of possible fields
            }
            // end of the list of possible fields
          }
        ]
      }
      // end of the list of possible fields
    }
  ],
  "tools": [
    {
      // Includes only one of the fields `function`
      "function": {
        "name": "string",
        "description": "string",
        "parameters": "google.protobuf.Struct"
      }
      // end of the list of possible fields
    }
  ]
}

Request for the service to generate text completion.

Field

Description

modelUri

string

The ID of the model to be used for completion generation.

completionOptions

CompletionOptions

Configuration options for completion generation.

messages[]

Message

A list of messages representing the context for the completion model.

tools[]

Tool

List of tools that are available for the model to invoke during the completion generation.
Note: This parameter is not yet supported and will be ignored if provided.

CompletionOptions

Defines the options for completion generation.

Field

Description

stream

bool

Enables streaming of partially generated text.

temperature

google.protobuf.DoubleValue

Affects creativity and randomness of responses. Should be a double number between 0 (inclusive) and 1 (inclusive).
Lower values produce more straightforward responses while higher values lead to increased creativity and randomness.
Default temperature: 0.3

maxTokens

google.protobuf.Int64Value

The limit on the number of tokens used for single completion generation.
Must be greater than zero. This maximum allowed parameter value may depend on the model being used.

Message

A message object representing a wrapper over the inputs and outputs of the completion model.

Field

Description

role

string

The ID of the message sender. Supported roles:

  • system: Special role used to define the behaviour of the completion model.
  • assistant: A role used by the model to generate responses.
  • user: A role used by the user to describe requests to the model.

text

string

Textual content of the message.

Includes only one of the fields text, toolCallList, toolResultList.

Message content.

toolCallList

ToolCallList

List of tool calls made by the model as part of the response generation.

Includes only one of the fields text, toolCallList, toolResultList.

Message content.

toolResultList

ToolResultList

List of tool results returned from external tools that were invoked by the model.

Includes only one of the fields text, toolCallList, toolResultList.

Message content.

ToolCallList

Represents a list of tool calls.

Field

Description

toolCalls[]

ToolCall

A list of tool calls to be executed.

ToolCall

Represents a call to a tool.

Field

Description

functionCall

FunctionCall

Represents a call to a function.

Includes only one of the fields functionCall.

FunctionCall

Represents the invocation of a function with specific arguments.

Field

Description

name

string

The name of the function being called.

arguments

google.protobuf.Struct

The structured arguments passed to the function.
These arguments must adhere to the JSON Schema defined in the corresponding function's parameters.

ToolResultList

Represents a list of tool results.

Field

Description

toolResults[]

ToolResult

A list of tool results.

ToolResult

Represents the result of a tool call.

Field

Description

functionResult

FunctionResult

Represents the result of a function call.

Includes only one of the fields functionResult.

FunctionResult

Represents the result of a function call.

Field

Description

name

string

The name of the function that was executed.

content

string

The result of the function call, represented as a string.
This field can be used to store the output of the function.

Includes only one of the fields content.

Tool

Represents a tool that can be invoked during completion generation.

Field

Description

function

FunctionTool

Represents a function that can be called.

Includes only one of the fields function.

FunctionTool

Represents a function tool that can be invoked during completion generation.

Field

Description

name

string

The name of the function.

description

string

A description of the function's purpose or behavior.

parameters

google.protobuf.Struct

A JSON Schema that defines the expected parameters for the function.
The schema should describe the required fields, their types, and any constraints or default values.

CompletionResponse

{
  "alternatives": [
    {
      "message": {
        "role": "string",
        // Includes only one of the fields `text`, `toolCallList`, `toolResultList`
        "text": "string",
        "toolCallList": {
          "toolCalls": [
            {
              // Includes only one of the fields `functionCall`
              "functionCall": {
                "name": "string",
                "arguments": "google.protobuf.Struct"
              }
              // end of the list of possible fields
            }
          ]
        },
        "toolResultList": {
          "toolResults": [
            {
              // Includes only one of the fields `functionResult`
              "functionResult": {
                "name": "string",
                // Includes only one of the fields `content`
                "content": "string"
                // end of the list of possible fields
              }
              // end of the list of possible fields
            }
          ]
        }
        // end of the list of possible fields
      },
      "status": "AlternativeStatus"
    }
  ],
  "usage": {
    "inputTextTokens": "int64",
    "completionTokens": "int64",
    "totalTokens": "int64"
  },
  "modelVersion": "string"
}

Response containing generated text completions.

Field

Description

alternatives[]

Alternative

A list of generated completion alternatives.

usage

ContentUsage

A set of statistics describing the number of content tokens used by the completion model.

modelVersion

string

The model version changes with each new releases.

Alternative

Represents a generated completion alternative, including its content and generation status.

Field

Description

message

Message

A message with the content of the alternative.

status

enum AlternativeStatus

The generation status of the alternative.

  • ALTERNATIVE_STATUS_UNSPECIFIED: Unspecified generation status.
  • ALTERNATIVE_STATUS_PARTIAL: Partially generated alternative.
  • ALTERNATIVE_STATUS_TRUNCATED_FINAL: Incomplete final alternative resulting from reaching the maximum allowed number of tokens.
  • ALTERNATIVE_STATUS_FINAL: Final alternative generated without running into any limits.
  • ALTERNATIVE_STATUS_CONTENT_FILTER: Generation was stopped due to the discovery of potentially sensitive content in the prompt or generated response.
    To fix, modify the prompt and restart generation.
  • ALTERNATIVE_STATUS_TOOL_CALLS: Tools were invoked during the completion generation.

Message

A message object representing a wrapper over the inputs and outputs of the completion model.

Field

Description

role

string

The ID of the message sender. Supported roles:

  • system: Special role used to define the behaviour of the completion model.
  • assistant: A role used by the model to generate responses.
  • user: A role used by the user to describe requests to the model.

text

string

Textual content of the message.

Includes only one of the fields text, toolCallList, toolResultList.

Message content.

toolCallList

ToolCallList

List of tool calls made by the model as part of the response generation.

Includes only one of the fields text, toolCallList, toolResultList.

Message content.

toolResultList

ToolResultList

List of tool results returned from external tools that were invoked by the model.

Includes only one of the fields text, toolCallList, toolResultList.

Message content.

ToolCallList

Represents a list of tool calls.

Field

Description

toolCalls[]

ToolCall

A list of tool calls to be executed.

ToolCall

Represents a call to a tool.

Field

Description

functionCall

FunctionCall

Represents a call to a function.

Includes only one of the fields functionCall.

FunctionCall

Represents the invocation of a function with specific arguments.

Field

Description

name

string

The name of the function being called.

arguments

google.protobuf.Struct

The structured arguments passed to the function.
These arguments must adhere to the JSON Schema defined in the corresponding function's parameters.

ToolResultList

Represents a list of tool results.

Field

Description

toolResults[]

ToolResult

A list of tool results.

ToolResult

Represents the result of a tool call.

Field

Description

functionResult

FunctionResult

Represents the result of a function call.

Includes only one of the fields functionResult.

FunctionResult

Represents the result of a function call.

Field

Description

name

string

The name of the function that was executed.

content

string

The result of the function call, represented as a string.
This field can be used to store the output of the function.

Includes only one of the fields content.

ContentUsage

An object representing the number of content tokens used by the completion model.

Field

Description

inputTextTokens

int64

The number of tokens in the textual part of the model input.

completionTokens

int64

The number of tokens in the generated completion.

totalTokens

int64

The total number of tokens, including all input tokens and all generated tokens.
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