Enum ThinkingLevel 

pub enum ThinkingLevel {
    Minimal,
    Low,
    Medium,
    High,
}

Available on crate features models and gemini only.

Native thinking level for Gemini 3 models.

Controls the amount of reasoning effort the model applies. This is the Gemini 3 native thinking control — for Gemini 2.5 budget-based thinking, use ThinkingConfig::with_thinking_budget instead.

Serializes as lowercase per the Gemini API contract (e.g., "low", "high").

Available levels (model support varies):

• Minimal — matches “no thinking” for most queries; model may still think minimally for complex coding tasks. Not supported on Gemini 3.1 Pro.
• Low — minimizes latency and cost; best for simple tasks.
• Medium — balanced thinking for most tasks.
• High — maximizes reasoning depth (default for Gemini 3 Flash and 3.1 Pro).

Variants

Minimal

Minimal reasoning effort. Matches “no thinking” for most queries. Not supported on Gemini 3.1 Pro.

Low

Low reasoning effort. Best for simple instruction following and chat.

Medium

Medium reasoning effort. Balanced thinking for most tasks.

High

High reasoning effort — maximizes reasoning depth (default).

Trait Implementations

impl Clone for ThinkingLevel

fn clone(&self) -> ThinkingLevel

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ThinkingLevel

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ThinkingLevel

fn deserialize<__D>( __deserializer: __D, ) -> Result<ThinkingLevel, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ThinkingLevel

fn eq(&self, other: &ThinkingLevel) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ThinkingLevel

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ThinkingLevel

impl Eq for ThinkingLevel

impl StructuralPartialEq for ThinkingLevel