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: single-source

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
primary
Witness
single-source only
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
$0.0900
Cached input / 1M
$0.0450
Output / 1M tokens
$0.3600
Currency
USD
Billing unit
per_1m_tokens
Context window
131072
Max output
65536

Atlas 120B

changeproof/atlas-120b · ChangeProof Source Lab

Input / 1M tokens
$0.1800
Cached input / 1M
$0.0900
Output / 1M tokens
$0.7200
Currency
USD
Billing unit
per_1m_tokens
Context window
131072
Max output
65536

JSON contract: /api/source-lab. The API is a deterministic inspection surface; the HTML representations above are the extraction-facing Source Lab.