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Model infoModelsSnapshot: 15 Oct 2026

IBM / Slate

Slate 125M English Retriever V2

English retrieval bi-encoder producing 768-dimensional vectors for semantic search and similarity.

deprecatedClosed weightsEmbeddings
Official documentation (opens in a new tab)Reviewed 14 Oct 2026
10 of 20 specification fields collected
Input token limit512512 tokens
Vector dimensions768768 dimensions
Input billingSee ratesIBM watsonx.ai
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
Maximum output
Not collected
Reasoning
Not collected
Tool calling
Not collected
Structured output
Not collected
Streaming
Not collected
Batch processing
Not collected
Fine-tuning
Not collected
Knowledge cutoff
Not collected
Release date
2024-08-15Source for Release date (opens in a new tab)

Hosted service availability date, not the date of training completion.

Architecture
RoBERTa-base bi-encoder; model fusionSource for Architecture (opens in a new tab)
Context caching
Not collected
Checkpoint revision
2.0.1; model card dated 2024-06-30Source for Checkpoint revision (opens in a new tab)

Model card revision precedes hosted service availability.

Published price
USD 0.106 per million input tokensSource for Published price (opens in a new tab)

The product pricing page differs from the encoder documentation’s USD 0.0001 per 1K tokens (USD 0.10/M). Product pricing is used here; confirm the account tariff.

Access & pricing

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

API model ID
ibm/slate-125m-english-rtrvr-v2
Access
Hosted embedding API. Deprecated with scheduled withdrawal on 2027-01-12 in the live index and lifecycle table.
Regions
Product, deployment, and region restrictions apply. This record does not imply global availability or residency.
lifecycleDiscrepancy
Live API: deprecated 2026-05-05; lifecycle table: 2026-05-08. Both schedule withdrawal 2027-01-12.Source for lifecycleDiscrepancy (opens in a new tab)

The older card still says 2026-08-08. Current API and lifecycle table take precedence for hosted availability.

availabilityDiscrepancy
Live Dallas index says 2025-06-15; lifecycle table says 2024-08-15Source for availabilityDiscrepancy (opens in a new tab)

Retained as a regional/catalog discrepancy, not another model revision.

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 14 Oct 2026
CategoryUsageRateUnit
EmbeddingsInput text1$0.1061M tokens

Rate conditions

  1. Indicative product-page rate, excluding taxes; location and availability restrictions apply. Encoder documentation lists USD 0.10/M instead. No output-token or prompt-cache tariff is inferred.
Pricing source (opens in a new tab)

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

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.

IBM watsonx.ai

ibm/slate-125m-english-rtrvr-v2
Not verified
How it works
Not collected
Minimum reusable input
Not collected
Lifetime & refresh
Not collected
How to enable it
Not collected
Usage fields
Not collected
Billing rules
Not collected
Limits & data boundaries
Not collected

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

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

IBM’s proprietary Slate retrieval checkpoint, offered through watsonx and documented separately from the later public Granite Embedding family. Closed-weight classification is inferred from product distribution and the reviewed IBM weight inventories, not merely from the IBM brand.

Classification evidence (opens in a new tab)

Lifecycle dates

Hosted availability15 Aug 2024Source (opens in a new tab)
Deprecated (lifecycle table)8 May 2026Source (opens in a new tab)
Scheduled hosted withdrawal12 Jan 2027Source (opens in a new tab)

Sources reviewed