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Model infoModelsSnapshot: 15 Oct 2026

Lexica / Aperture

Lexica Aperture v4

Lexica image-generation model offered in the published web generator, with version-specific canvas sizes and paid-plan access.

Image generation
availableClosed weightsImage generation
Official documentation (opens in a new tab)Reviewed 15 Oct 2026
9 of 24 specification fields collected
Text input limit10K10,000
Maximum outputNot collectedAwaiting source review
Input billingSee ratesLexica web
Output billingSee ratesPublished units and conditions below

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

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Maximum input tokens
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Maximum output
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Maximum prompt characters
10,000Source for Maximum prompt characters (opens in a new tab)

The client rejects trimmed prompts longer than 10,000 characters. UI message says “under 10,000”; the condition allows exactly 10,000. This is not a verified server-side limit.

Reasoning
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Tool calling
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Structured output
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Streaming
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Batch processing
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Fine-tuning
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Context caching
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Knowledge cutoff
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Release date
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Parameters
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Architecture
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

Languages
Not collected

Not established for this exact Aperture version. Image output and a four-image web request do not establish a language token budget or asynchronous Batch API.

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

The client also supports uploaded-image workflows, but exact version-specific editing and reference contracts remain to be verified.

Output modalities
ImageSource for Output modalities (opens in a new tab)
Supported image sizes
View all 31 entries
  • 1728 × 576
  • 1664 × 576
  • 1600 × 640
  • 1536 × 640
  • 1472 × 704
  • 1408 × 704
  • 1344 × 704
  • 1344 × 768
  • 1280 × 768
  • 1216 × 832
  • 1152 × 832
  • 1152 × 896
  • 1088 × 896
  • 1088 × 960
  • 1024 × 960
  • 1024 × 1024
  • 960 × 1024
  • 960 × 1088
  • 896 × 1088
  • 896 × 1152
  • 832 × 1152
  • 832 × 1216
  • 768 × 1280
  • 768 × 1344
  • 704 × 1344
  • 704 × 1408
  • 704 × 1472
  • 640 × 1536
  • 640 × 1600
  • 576 × 1664
  • 576 × 1728
Source for Supported image sizes (opens in a new tab)

Published client dimension presets, not a verified backend maximum or an upscaled export limit. For historical versions these are retained client tables, not proof of current access.

Endpoint availability
Selectable in the current published web generator. Paid sign-in is required; authenticated generation was not tested.Source for Endpoint availability (opens in a new tab)
Negative prompts
A negative-prompt control is present in the published generator; edit mode may hide it.Source for Negative prompts (opens in a new tab)
Negative prompt character limit
10,000Source for Negative prompt character limit (opens in a new tab)

Trimmed client-side validation only; not an authenticated backend limit.

Subscription plans
Starter: $8/month billed annually, 1,000 fast generations/month and two concurrent fast jobs. Pro: $24/month billed annually, 3,000 fast generations/month and three concurrent fast jobs. Max: $48/month billed annually, 7,000 fast generations/month and three concurrent fast jobs. Pro and Max slow queues have a daily cap whose numeric limit is not published here. No free generation plan.Source for Subscription plans (opens in a new tab)
Generation controls
Each prompt submission consumes four image-generation credits. Uploaded-image workflows and variations are present in the UI; exact reference count, byte limits and per-version editing behavior remain unverified.Source for Generation controls (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.

Lexica web

Provider source (opens in a new tab)
API model ID
lexica-aperture-v4

First-party web client identifier only. This is not a documented public generation API selector.

Access
Paid authenticated web generator at https://lexica.art/aperture. No publicly documented generation API established.
Regions
Deployment regions not established
API endpoint URL
Web access: https://lexica.art/aperture. Public documentation describes search only, not generation.Source for API endpoint URL (opens in a new tab)
Creation privacy
Images created on Starter or Pro are public. Max images are private unless shared. Exact storage retention and training-use policy were not established.Source for Creation privacy (opens in a new tab)
Concurrent requests
Starter: two concurrent fast jobs. Pro and Max: three concurrent fast jobs. Slow-generation daily cap is not numerically specified.Source for Concurrent requests (opens in a new tab)

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 15 Oct 2026
CategoryUsageRateUnit
Web subscriptionStarter annual-billing equivalent1$8.00month, billed annually
Web subscriptionPro annual-billing equivalent2$24.00month, billed annually
Web subscriptionMax annual-billing equivalent3$48.00month, billed annually
Web generation top-upAdditional fast generation4$0.05generation credit

Rate conditions

  1. Shared Lexica account plan, not a separate charge for each model. 1,000 fast image generations/month; each prompt submission uses four credits. Annual commitment; not a standalone API rate. No plan-price-to-per-image conversion inferred.
  2. Shared Lexica account plan, not a separate charge for each model. 3,000 fast image generations/month; each prompt submission uses four credits. Annual commitment; not a standalone API rate. No plan-price-to-per-image conversion inferred.
  3. Shared Lexica account plan, not a separate charge for each model. 7,000 fast image generations/month; each prompt submission uses four credits. Annual commitment; not a standalone API rate. No plan-price-to-per-image conversion inferred.
  4. Optional account-wide top-up, usable only with an active plan. Credits do not expire. Each prompt submission consumes four image-generation credits; this is not a per-question or public generation API tariff.
Pricing source (opens in a new tab)

Data & enterprise terms

Starter and Pro images are public and may appear in search. Max images are private unless shared. Commercial image use depends on plan and team size. Output-image licensing does not disclose model weights, retention periods or a training opt-out.

Read the service policy (opens in a new tab)

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.

Lexica web

lexica-aperture-v4
Not verified

No reviewed prompt caching contract or discounted cache tariff. Image search and stored generation history are not prompt-cache billing.

How it works
Not collected

No reviewed prompt caching contract or discounted cache tariff. Image search and stored generation history are not prompt-cache billing.

Minimum reusable input
Not collected

No reviewed prompt caching contract or discounted cache tariff. Image search and stored generation history are not prompt-cache billing.

Lifetime & refresh
Not collected

No reviewed prompt caching contract or discounted cache tariff. Image search and stored generation history are not prompt-cache billing.

How to enable it
Not collected

No reviewed prompt caching contract or discounted cache tariff. Image search and stored generation history are not prompt-cache billing.

Usage fields
Not collected

No reviewed prompt caching contract or discounted cache tariff. Image search and stored generation history are not prompt-cache billing.

Billing rules
Not collected

No reviewed prompt caching contract or discounted cache tariff. Image search and stored generation history are not prompt-cache billing.

Limits & data boundaries
Not collected

No reviewed prompt caching contract or discounted cache tariff. Image search and stored generation history are not prompt-cache billing.

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

Caching reviewed 15 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

Private hosted-model classification is inferred from the provider describing its model training work and distinguishing its Aperture model from public Stable Diffusion images, its subscription-only generation service, and no matching weight distribution established in the reviewed first-party sources. This is not an explicit weight-license statement. Exact upstream architecture and derivative ancestry remain unresolved; the output image license is not a weight license.

Classification evidence (opens in a new tab)

Sources reviewed