Enum Model 

pub enum Model {
    Gemini35Flash,
    Gemini31ProPreview,
    Gemini31FlashLite,
    Gemini31FlashImage,
    Gemini3ProPreview,
    Gemini3ProImage,
    Gemini3ProImagePreview,
    Gemini3FlashPreview,
    Gemini25Pro,
    Gemini25ProPreviewTts,
    Gemini25Flash,
    Gemini25FlashPreview092025,
    Gemini25FlashImage,
    Gemini25FlashImagePreview,
    Gemini25FlashLive122025,
    Gemini25FlashLive092025,
    Gemini25FlashPreviewTts,
    Gemini25FlashLite,
    Gemini25FlashLitePreview092025,
    GeminiEmbedding2,
    GeminiEmbedding001,
    Custom(String),
}

Available Gemini model identifiers.

Each variant maps to a specific model version on the Gemini API. Use Model::Custom for model IDs not yet represented as variants.

Variants

Gemini35Flash

Gemini 3.5 Flash.

Gemini31ProPreview

Gemini 3.1 Pro preview — strongest reasoning.

Gemini31FlashLite

Gemini 3.1 Flash Lite — GA, most cost-efficient for high-volume agentic tasks.

Gemini31FlashImage

Gemini 3.1 Flash Image (Nano Banana 2) — GA native image generation.

Gemini3ProPreview

Gemini 3 Pro preview.

Gemini3ProImage

Gemini 3 Pro Image (Nano Banana Pro) — GA multimodal output.

Gemini3ProImagePreview

👎Deprecated:

Shut down June 25, 2026. Use Model::Gemini3ProImage instead.

Gemini 3 Pro Image preview (deprecated).

Gemini3FlashPreview

Gemini 3 Flash preview — good balance of speed and capability.

Gemini25Pro

Gemini 2.5 Pro — advanced reasoning.

Gemini25ProPreviewTts

Gemini 2.5 Pro preview with TTS support.

Gemini25Flash

Gemini 2.5 Flash.

Gemini25FlashPreview092025

Gemini 2.5 Flash preview (September 2025).

Gemini25FlashImage

Gemini 2.5 Flash with image generation.

Gemini25FlashImagePreview

👎Deprecated:

Use Model::Gemini25FlashImage instead

Deprecated: use Gemini25FlashImage instead.

Gemini25FlashLive122025

Gemini 2.5 Flash native audio preview (December 2025).

Gemini25FlashLive092025

Gemini 2.5 Flash native audio preview (September 2025).

Gemini25FlashPreviewTts

Gemini 2.5 Flash preview with TTS support.

Gemini25FlashLite

Gemini 2.5 Flash Lite — cost-efficient.

Gemini25FlashLitePreview092025

Gemini 2.5 Flash Lite preview (September 2025).

GeminiEmbedding2

Gemini Embedding 2 — GA multimodal embeddings (text, image, video, audio, PDF).

GeminiEmbedding001

Gemini Embedding 001 (3072 dimensions). Replaces text-embedding-004.

Custom(String)

A custom model identifier string (e.g. "models/my-tuned-model").

Implementations

impl Model

pub fn gemini_3_7_flash() -> Self

Return the current balanced Gemini default.

This factory avoids adding a new enum variant whenever Google releases a model while preserving exhaustive matches for existing callers.

pub fn gemini_3_6_flash() -> Self

Return Gemini 3.6 Flash.

pub fn gemini_3_5_flash_lite() -> Self

Return Gemini 3.5 Flash-Lite, the most cost-efficient GA model.

pub fn as_str(&self) -> &str

Returns the model identifier as a string slice.

pub fn vertex_model_path(&self, project_id: &str, location: &str) -> String

Returns the Vertex AI model resource path for this model.

Trait Implementations

impl Clone for Model

fn clone(&self) -> Model

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Model

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

Formats the value using the given formatter.

impl Default for Model

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Model

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Model

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

Formats the value using the given formatter.

impl Eq for Model

impl From<String> for Model

fn from(model: String) -> Self

Converts to this type from the input type.

impl Hash for Model

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Model

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Model

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Model