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Model infoModelsSnapshot: 15 Oct 2026

Rime / Mist

Mist v1

Legacy conversational speech model. Rime still serves the named legacy selector, while current documentation recommends migration to Mist v3.

deprecatedClosed weightsText-to-speech
Official documentation (opens in a new tab)Reviewed 13 Oct 2026
4 of 17 specification fields collected
Context windowNot collectedAwaiting source review
Maximum outputNot collectedAwaiting source review
Input billingNot collectedRime API
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
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
Not collected
Parameters
Not collected
Architecture
Not collected
Context caching
Not collected
Voice references
117 unique voices across 117 model/language/speaker pairingsSource for Voice references (opens in a new tab)

A voice name can support more than one listed language. Provider descriptions are subjective casting metadata, not verified personal traits.

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
mist
Access
Legacy selector still served according to the migration guide; no longer covered by current model reference pages. Verify old feature and voice compatibility before relying on it.
Regions
US West (us-west-2) and US East (us-east-1) native regions. These routing details are not a blanket contractual residency guarantee.
API endpoint URL
https://users.rime.ai/v1/rime-ttsSource for API endpoint URL (opens in a new tab)
Output formats
Can return a JSON audioContent envelope with Base64 audio; Mist v2 additionally supports server-sent eventsSource for Output formats (opens in a new tab)
Generation controls
Legacy language/normalization behavior differs from Mist v3; noTextNormalization and saveOovs controls are legacy-only.Source for Generation controls (opens in a new tab)

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

Data & enterprise terms

Rime documents character-count-only collection by default and no customer-content model training without opt-in. Optional request retention is disabled by default and can be enabled for support/quality investigation; enabling it does not authorize training. Voice-clone recordings have separate customer-specific training permission. MSA/BAA terms may vary.

Read the service policy (opens in a new tab)
API model ID
mist
Access
Cerebrium partner-service beta documents this selector. Provision a private runtime and confirm the engine version, license and current support contract.
Regions
Customer-selected deployment region; confirm supported regions.

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

Data & enterprise terms

Partner runtime uses a Rime API key for authentication. A complete host retention/training contract and current engine support guarantee are not established from this guide.

Read the service policy (opens in a new tab)
API model ID
rime/mist
Access
Retired on this host. Native or other dedicated deployments have separate lifecycle.
Regions
Global host endpoint; model rows do not list a dedicated EU endpoint.
Languages
enSource for Languages (opens in a new tab)

Host-specific table. Mist v3 lists Hindi here while native Rime lists four languages; do not transfer this to native coverage.

Endpoint retirement date
2026-10-01Source for Endpoint retirement date (opens in a new tab)

The date has passed even though the host table still labels the row DEPRECATED.

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

Data & enterprise terms

LiveKit documents no inference-content retention by default, including underlying providers, with optional observability and voice storage handled separately.

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.

Rime API

mist
Not verified

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

How it works
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Minimum reusable input
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Lifetime & refresh
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

How to enable it
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Usage fields
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Billing rules
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Limits & data boundaries
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

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

Cerebrium

mist
Not verified

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

How it works
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Minimum reusable input
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Lifetime & refresh
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

How to enable it
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Usage fields
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Billing rules
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Limits & data boundaries
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

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

LiveKit Inference

rime/mist
Not verified

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

How it works
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Minimum reusable input
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Lifetime & refresh
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

How to enable it
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Usage fields
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Billing rules
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

Limits & data boundaries
Not collected

No model-specific prompt-cache contract or discounted cached-character rate established. TensorRT engine caches, persistent sockets and speaker profiles are not prompt caching.

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

Voice choices

117 voices

Choose a voice within Mist v1. These are API voice identifiers, not additional model releases. Source links document each voice.

Published voice catalog
Voice / API IDLanguage & accentDelivery
abbieabbieEnglish (eng)
US / California
A bright, upbeat young Californian voice, friendly and quick.Voice source (opens in a new tab)
alexisalexisEnglish (eng)A clear, even-keeled female voice.Voice source (opens in a new tab)
allisonallisonEnglish (eng)
US / Standard
A soft, whispery young American voice, calm and soothing.Voice source (opens in a new tab)
allyallyEnglish (eng)
US / California
An upbeat young Latina voice with a casual edge.Voice source (opens in a new tab)
alonaalonaEnglish (eng)
US / California
A bright, upbeat young Latina voice, lively and warm.Voice source (opens in a new tab)
alpinealpineEnglish (eng)
US / Standard
A friendly young Latino voice, easygoing and approachable.Voice source (opens in a new tab)
amberamberEnglish (eng)
US / Standard
A cool, serious young American voice, low and steady.Voice source (opens in a new tab)
anaanaEnglish (eng)
US / Standard
A flexible female voice, both polished and approachable.Voice source (opens in a new tab)

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

Rime reserves ownership of its AI voice models and grants a limited service license. Current Coda/Mist deployments explicitly use private, closed-source licensed engine images; Together describes Arcana as proprietary. The separately released Rimecaster speaker-embedding model is CC-BY-4.0 and is excluded.

Classification evidence (opens in a new tab)

Lifecycle dates

Current introduction article dated; original launch day unverified6 Mar 2025Source (opens in a new tab)

Sources reviewed