> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Thinking Budget • Rust AI Agent SDK
> ThinkingBudget: Budget constraints for extended thinking. Controls how much thinking/reasoning the LLM can do before producing a response.
# ThinkingBudget
> Defined in the [**thinking**](../modules/thinking) module.
Rust AI Agent SDK
Budget constraints for extended thinking. Controls how much thinking/reasoning the LLM can do before producing a response.
## Fields
| Name | Type | Description |
| ----------------------- | --------------------------- | -------------------------------------------- |
| `max_tokens` | `usize` | Maximum tokens for thinking |
| `max_time_seconds` | `Option<f64>` | Maximum time in seconds (optional) |
| `adaptive` | `bool` | Whether to adapt budget based on complexity |
| `level` | `Option<BudgetLevel>` | Budget level (if using predefined) |
| `min_tokens` | `usize` | Minimum tokens for adaptive budgeting |
| `complexity_multiplier` | `f64` | Complexity multiplier for adaptive budgeting |
## Methods
### `new`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn new() -> ThinkingBudgetBuilder
```
Create a new ThinkingBudget with default values.
### `from_level`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn from_level(level: BudgetLevel) -> Self
```
Create a budget from a predefined level.
**Parameters:**
| Name | Type |
| ------- | ------------- |
| `level` | `BudgetLevel` |
### `minimal`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn minimal() -> Self
```
Create a minimal budget.
### `low`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn low() -> Self
```
Create a low budget.
### `medium`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn medium() -> Self
```
Create a medium budget.
### `high`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn high() -> Self
```
Create a high budget.
### `maximum`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn maximum() -> Self
```
Create a maximum budget.
### `get_tokens_for_complexity`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn get_tokens_for_complexity(&self, complexity: f64) -> usize
```
Get token budget based on task complexity. # Arguments \* `complexity` - Complexity score (0.0 to 1.0) # Returns Adjusted token budget
**Parameters:**
| Name | Type |
| ------------ | ----- |
| `complexity` | `f64` |
### `to_map`
```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn to_map(&self) -> HashMap
```
Convert to HashMap for serialization.
## Source
`praisonai/src/thinking/mod.rs` at line 80
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