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Model infoModelsSnapshot: 15 Oct 2026

Luminance / Historical legal Transformers

Legal Pre-Trained Transformer (LPT)

Historical proprietary legal Transformer family described as the foundation for Luminance contract understanding and generation.

Language models (LLMs)
historicalClosed weightsText generation
Official documentation (opens in a new tab)Reviewed 16 Oct 2026
4 of 18 specification fields collected
Context windowNot collectedAwaiting source review
Maximum outputNot collectedAwaiting source review
Input billingNot collectedLuminance platform
Output billingNot collectedNo inferred price

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Maximum input tokens
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Maximum output
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Parameters
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Release date
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Knowledge cutoff
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Tool calling
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Structured output
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Streaming
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Batch processing
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Fine-tuning
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Reasoning
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Context caching
Not collected

No reviewed model-specific inference contract. Unknown does not mean unsupported.

Architecture
Legal Pre-Trained Transformer technology combining contract analysis and generation.Source for Architecture (opens in a new tab)

The earlier LITE engine announcement documents in-house Transformer development. It does not establish separate versioned checkpoint identities.

Base model
Not collected

No exact foundational checkpoint or independently named historical derivative established.

Published training data
The May 2023 announcement describes exposure to over 150M documents and learning from legally verified documents.Source for Published training data (opens in a new tab)

An exposure claim does not enumerate a reproducible training corpus or establish a native input ceiling.

Input modalities
TextSource for Input modalities (opens in a new tab)
Output modalities
TextSource for Output modalities (opens in a new tab)

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

Luminance platform

Provider source (opens in a new tab)
API model ID
Not collected

No public standalone model selector is established; document and task IDs are application identifiers.

Access
Historical platform model family; current snapshot availability and retirement are unresolved.
Regions
Historical model-specific processing-region contract not verified.

Endpoint pricing has not been collected. Check the provider for applicable rates.

Data & enterprise terms

The current 2026 terms are not backdated to the 2022–2023 models. Historical model-specific training, retention and deployment contracts remain unverified.

Caching

Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.

01 / INITIAL INPUTProcess & retain

The system processes eligible input and retains reusable state.

02 / LATER REQUESTCheck available state

Reuse depends on matching input, session state and the cache policy.

03 / CACHE HITReuse & generate

Reusing state can reduce repeated work. Any charges follow the billing rules below.

Luminance platform

Not verified

No model-specific inference-cache contract. Application memory, precomputed legal data, saved searches and retention are distinct.

How it works
Not collected

No model-specific inference-cache contract. Application memory, precomputed legal data, saved searches and retention are distinct.

Minimum reusable input
Not collected

No model-specific inference-cache contract. Application memory, precomputed legal data, saved searches and retention are distinct.

Lifetime & refresh
Not collected

No model-specific inference-cache contract. Application memory, precomputed legal data, saved searches and retention are distinct.

How to enable it
Not collected

No model-specific inference-cache contract. Application memory, precomputed legal data, saved searches and retention are distinct.

Usage fields
Not collected

No model-specific inference-cache contract. Application memory, precomputed legal data, saved searches and retention are distinct.

Billing rules
Not collected

No model-specific inference-cache contract. Application memory, precomputed legal data, saved searches and retention are distinct.

Limits & data boundaries
Not collected

No model-specific inference-cache contract. Application memory, precomputed legal data, saved searches and retention are distinct.

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Caching reviewed 16 Oct 2026

What the measurements say

No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.

Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.

The record behind the model

Why it is included

Provider explicitly describes proprietary legal Transformer technology and in-house model development. Individual historical checkpoints and downloadable weights are not published in the reviewed sources.

Classification evidence (opens in a new tab)

Lifecycle dates

LITE Transformer development described in the original announcement body; migrated page header differs7 Dec 2022Source (opens in a new tab)
LPT technology described at Ask Lumi launch; not necessarily first model availability11 May 2023Source (opens in a new tab)

Sources reviewed