GenerateResult: Generate Result

In aisdk: Unified Interface for AI Model Providers

Generate Result

Description

Result object returned by model generation.

Details

This class uses lock_objects = FALSE to allow dynamic field addition. This enables the ReAct loop and other components to attach additional metadata (like steps, all_tool_calls) without modifying the class.

For models that support reasoning/thinking (like OpenAI o1/o3, DeepSeek, Claude with extended thinking), the reasoning field contains the model's chain-of-thought content.

For Responses API models, response_id contains the server-side response ID which can be used for multi-turn conversations without sending full history.

Public fields

text

The generated text content.

usage

Token usage information.

finish_reason

Reason the model stopped generating.

warnings

Any warnings from the model.

raw_response

The raw response from the provider API.

tool_calls

List of tool calls requested by the model.

steps

Number of ReAct loop steps taken.

all_tool_calls

Accumulated list of all tool calls across steps.

reasoning

Optional chain-of-thought or reasoning content.

response_id

Server-side response ID for Responses-style APIs.

Methods

Public methods

• GenerateResult$new()

• GenerateResult$print()

• GenerateResult$clone()

---

Method new()

Initialize a GenerateResult object.

Usage

GenerateResult$new(
  text = NULL,
  usage = NULL,
  finish_reason = NULL,
  warnings = NULL,
  raw_response = NULL,
  tool_calls = NULL,
  steps = NULL,
  all_tool_calls = NULL,
  reasoning = NULL,
  response_id = NULL
)

Arguments

text

Generated text.

usage

Token usage.

finish_reason

Reason for stopping.

warnings

Warnings.

raw_response

Raw API response.

tool_calls

Tool calls requested by the model.

steps

Number of ReAct steps taken.

all_tool_calls

All tool calls across steps.

reasoning

Chain-of-thought content.

response_id

Server-side response ID for Responses-style APIs.

---

Method print()

Print method for GenerateResult.

Usage

GenerateResult$print()

---

Method clone()

The objects of this class are cloneable with this method.

Usage

GenerateResult$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

aisdk documentation built on May 29, 2026, 9:07 a.m.