DryBase

DryBase is the exponent base of the DRY penalty growth formula. It determines how quickly the penalty ramps up as a repeated phrase extends. DryBase only has effect when DryMultiplier is enabled (positive).

Quick reference

Type	float
Default	1.75
Range	> 1.0; typical 1.5 – 2.5
Category	Phrase-level repetition penalty
Field on	SamplerParameters.DryBase

What it does

The DRY penalty applied to a token that would extend a repeated match is:

penalty = DryMultiplier × DryBase^(match_length - DryAllowedLength)

Larger DryBase means the penalty grows faster. A 5-token match with DryBase = 1.75 produces 1.75^5 ≈ 16 multiplied by DryMultiplier; at DryBase = 2.5 the same match yields 2.5^5 ≈ 98.

• DryBase = 1.5 — gentle growth; long repeats punished but not extremely.
• DryBase = 1.75 (default) — balanced; the value recommended by the original DRY paper.
• DryBase = 2.0+ — rapid growth; even medium-length repeats are heavily penalized.

When to change it

Scenario	Value
Default	1.75
Gentle phrase anti-repetition	1.5
Aggressive (model keeps finding ways to repeat)	2.0 – 2.5

Most workloads leave DryBase alone and tune DryMultiplier and DryAllowedLength. Change DryBase as a last resort if the standard combination does not stop repeats.

Example

var preset = new Qwen25Preset();
preset.SamplerParameters.DryMultiplier = 0.8f;
preset.SamplerParameters.DryBase = 2.0f;    // faster growth
preset.SamplerParameters.DryAllowedLength = 2;

using var api = AsposeLLMApi.Create(preset);

Interactions

• DryMultiplier — must be positive for DryBase to matter.
• DryAllowedLength — sets the exponent’s zero-point.
• DryPenaltyLastN — window of history DRY scans.
• DrySequenceBreakers — tokens that reset match detection.

What’s next

• DryMultiplier — enables DRY.
• DryAllowedLength — match-length threshold.
• Sampler parameters hub — all sampler knobs.