Longer queries are truncated to this token count; query and document share the model context window.
Ranking results
Ordered document indexes and relevance scores from 0 to 1. Scores are query dependent; compare rank rather than interpreting scores as calibrated probabilities.Source for Ranking results (opens in a new tab)
Ranking controls
top_n selects the number of returned results; omitted means all results, v2 max_tokens_per_doc defaults to 4096 and truncates longer documents, v1 max_chunks_per_doc controls chunking; v1 also offers rank_fields and return_documentsSource for Ranking controls (opens in a new tab)
Version-specific controls: v1 details are documented in the separately linked v1 API. The default v2 truncation setting is not the model context length.
This fixed API response does not imply general-purpose JSON-schema constrained generation.
Request limits
For performance, v2 recommends at most 1,000 documents per request. The best-practices guide describes a 10,000 document/chunk limit for v1-style chunking.Source for Request limits (opens in a new tab)
The recommendation is not an enforced 1,000-document ceiling. Best-practices and v1 reference differ on the equality boundary and default chunk count; check the selected transport.
Dedicated instance deployment. Select the performance tier and billing commitment in Model Vault.
Regions
Not collected
Prices retain their published currencies and billing units below.
Published billing units · original currency · observed 12 Oct 2026
Category
Usage
Rate
Unit
Dedicated inference · Medium
Hourly1
$5.00
instance-hour
Dedicated inference · Medium
Monthly1
$3,250.00
instance-month
Dedicated inference · Large
Hourly2
$10.00
instance-hour
Dedicated inference · Large
Monthly2
$6,500.00
instance-month
Rate conditions
Model Vault Medium performance tier. Hourly and monthly prices are alternative billing commitments, not additive token charges. Taxes, region and contract conditions require confirmation.
Model Vault Large performance tier. Hourly and monthly prices are alternative billing commitments, not additive token charges. Taxes, region and contract conditions require confirmation.
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.
Cohere API
rerank-v4.0-pro
Not verified
Provider-side caching has not been verified for this endpoint. Missing documentation is not evidence that caching is unsupported.
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.
Cohere Model Vault
Not verified
Provider-side caching has not been verified for this endpoint. Missing documentation is not evidence that caching is unsupported.
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
The provider explicitly labels this exact model Proprietary, separately from families with public weight downloads.