ChangeProof · public deterministic source

Inference pricing Source Lab

A controlled, public catalog for proving the difference between a real pricing change, extraction drift, and a plausible semantic mismatch.

state: semantic-drift

Explicit state controls

State is selected only by the URL query. There is no clock, random seed, session state, or mutable server store.

Primary layout sentinel: card-grid
Representation: both
Witness: available

primary representation

Inference pricing

This is the extraction-facing representation. Identity and semantic context are explicit; layout is a deliberately weak sentinel.

Atlas 20B

changeproof/atlas-20b · ChangeProof Source Lab

Input / 1M tokens: $0.0370
Cached input / 1M: $0.3000
Output / 1M tokens: $0.0750

Currency: USD
Billing unit: per_1m_tokens
Context window: 131072
Max output: 65536

Atlas 120B

changeproof/atlas-120b · ChangeProof Source Lab

Input / 1M tokens: $0.0750
Cached input / 1M: $0.6000
Output / 1M tokens: $0.1500

Currency: USD
Billing unit: per_1m_tokens
Context window: 131072
Max output: 65536

corroborating representation

Published pricing notes

A stable docs-style representation of the same published fact. It is optional evidence, not a prerequisite for normal single-source monitoring.

Atlas 20B documentation

Model identifier: changeproof/atlas-20b
Input price in USD per 1M tokens: $0.0750
Cached input price in USD per 1M tokens: $0.0370
Output price in USD per 1M tokens: $0.3000

Atlas 120B documentation

Model identifier: changeproof/atlas-120b
Input price in USD per 1M tokens: $0.1500
Cached input price in USD per 1M tokens: $0.0750
Output price in USD per 1M tokens: $0.6000