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FastModeDef

harn_vm::llm_config

Struct FastModeDef 

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pub struct FastModeDef {
    pub param: String,
    pub value: String,
    pub beta_header: Option<String>,
    pub otps_speedup: Option<f64>,
    pub status: Option<String>,
    pub pricing: Option<ModelPricing>,
    pub note: Option<String>,
}
Expand description

Optional accelerated-serving (“fast mode”) tier for a model. Off by default: its presence only describes that the provider offers a faster, premium-priced serving path running the same weights — callers must explicitly opt in via the provider’s request knob, so nothing here changes default behavior. Deliberately provider-agnostic: Anthropic exposes the tier as speed = "fast" (beta-gated), while OpenAI uses service_tier = "fast" / "priority". Premium pricing is stored as absolute per-MTok rates rather than a single multiplier because providers price the tier asymmetrically (Anthropic Opus 4.8 is 2x standard; Opus 4.6/4.7 fast mode is 6x).

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§param: String

Request field that opts into the fast tier (e.g. “speed” for Anthropic, “service_tier” for OpenAI).

§value: String

Value to send on param (e.g. “fast”, “priority”).

§beta_header: Option<String>

Provider beta/feature header required to use the tier, if any (e.g. Anthropic “fast-mode-2026-02-01”).

§otps_speedup: Option<f64>

Output-tokens-per-second speedup vs standard serving (e.g. 2.5).

§status: Option<String>

Lifecycle of the fast tier: “ga” | “research_preview” | “deprecated”. None when unspecified.

§pricing: Option<ModelPricing>

Premium pricing charged while the fast tier is active (absolute per-MTok rates, not a multiplier on standard pricing).

§note: Option<String>

Free-text note: constraints, deprecation timeline, etc.

Trait Implementations§

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impl Clone for FastModeDef

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fn clone(&self) -> FastModeDef

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for FastModeDef

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for FastModeDef

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

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for FastModeDef

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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

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

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

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for FastModeDef

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