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Model infoModelsSnapshot: 15 Oct 2026

Smallest AI / Pulse

Pulse

Multilingual transcription with distinct live and prerecorded language sets, diarization and vocabulary boosting.

Transcription
availableClosed weightsSpeech-to-text
Official documentation (opens in a new tab)Reviewed 13 Oct 2026
8 of 20 specification fields collected
Audio sample rates16,000 Hz recommendedSee specification notes below
Audio formats7 optionsSee specification notes below
Input billingSee ratesSmallest AI API
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
Input modalities
AudioSource for Input modalities (opens in a new tab)
Output modalities
TextSource for Output modalities (opens in a new tab)
Reasoning
Not collected
Tool calling
Not collected
Structured output
Not collected
Streaming
SupportedSource for Streaming (opens in a new tab)

Realtime transcription stream, not LLM token generation.

Batch processing
Not collected

Prerecorded audio is called batch transcription. No separate discounted bulk LLM-style batch contract is inferred.

Fine-tuning
Not collected
Knowledge cutoff
Not collected
Release date
Not collected
Parameters
Not collected
Architecture
Not collected
Languages
Language support depends on transport and region; see endpoint detailsSource for Languages (opens in a new tab)
Context caching
Not collected
Audio sample rates
16,000 Hz recommendedSource for Audio sample rates (opens in a new tab)
Audio formats
WAV, MP3, FLAC, Opus, μ-law, A-law, raw PCMSource for Audio formats (opens in a new tab)
Speaker diarization
SupportedSource for Speaker diarization (opens in a new tab)

Speaker labels are optional API outputs, not identity verification.

Usage metering
Published rates conflict. Compare the source and transport before estimating spend.Source for Usage metering (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.

Smallest AI API

Provider source (opens in a new tab)
API model ID
pulse
Access
POST https://api.smallest.ai/waves/v1/stt/?model=pulse. Set language explicitly and choose a region supporting it.
Regions
Automatic routing to Mumbai, India or Oregon, USA; api.india.smallest.ai and api.us.smallest.ai pin a region. Language availability can differ by region.
API endpoint URL
https://api.smallest.ai/waves/v1/stt/?model=pulseSource for API endpoint URL (opens in a new tab)
Request quotas
Standard plan: 25 requests/minute per modelSource for Request quotas (opens in a new tab)
Languages
View all 15 entries
  • en
  • hi
  • de
  • es
  • ru
  • it
  • fr
  • nl
  • pt
  • zh
  • ja
  • ko
  • multi-eu
  • multi-asian
  • multi-indic
Source for Languages (opens in a new tab)

Indic routes and multi-indic use India; East Asian routes and multi-asian use USA. Different set from realtime.

Vocabulary boosting
Up to 100 keywords; intensifier defaults to 1, recommended 1–3Source for Vocabulary boosting (opens in a new tab)
Transcript redaction
PII and payment-data redaction are documented as effective for English and HindiSource for Transcript redaction (opens in a new tab)

Acceptance of the flag on another language does not prove reliable redaction.

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 13 Oct 2026
CategoryUsageRateUnit
Speechpublished payg1$0.003audio minute
Speechcompare page rate2$0.005audio minute
Speechmay billing notice3$0.0035audio minute

Rate conditions

  1. Approximate marketing rate, also shown on the Pulse card. Conflicts with the compare-models page and dated billing change; confirm the account rate.
  2. Conflicting Standard-plan rate on the official comparison page; not an additional charge and not treated as a settled current tariff.
  3. Historical May 28, 2026 billing notice. Later undated pricing surfaces differ; shown for reconciliation, not added to other rates.
Pricing source (opens in a new tab)Pricing source (opens in a new tab)Pricing source (opens in a new tab)

Data & enterprise terms

Content is retained unless an eligible Enterprise data policy is enabled. Options: no content storage, a 24-hour to 90-day window, or x-expire-content: true for seven-day expiry. On other plans the header is ignored. Billing/usage metadata remains; settings are not retroactive. TTS saved history is excluded from window expiry. Speech-to-speech and cloning are not expressly covered.

Read the service policy (opens in a new tab)

Smallest AI API

Provider source (opens in a new tab)
API model ID
pulse
Access
wss://api.smallest.ai/waves/v1/stt/live?model=pulse. Set language explicitly and choose a region supporting it.
Regions
Automatic routing to Mumbai, India or Oregon, USA; api.india.smallest.ai and api.us.smallest.ai pin a region. Language availability can differ by region.
API endpoint URL
wss://api.smallest.ai/waves/v1/stt/live?model=pulseSource for API endpoint URL (opens in a new tab)
Request quotas
Standard plan: 100 concurrent requestsSource for Request quotas (opens in a new tab)
Languages
View all 25 entries
  • en
  • hi
  • hi-dev
  • de
  • es
  • ru
  • it
  • fr
  • nl
  • pt
  • zh
  • yue
  • ja
  • ko
  • gu
  • mr
  • or
  • bn
  • ta
  • te
  • kn
  • ml
  • north_indic
  • multi-asian
  • multi-south-indic
Source for Languages (opens in a new tab)

East Asian streaming routes use USA; South Indian beta and hi-dev use India. European streaming codes are beta. Aggregators are routing modes, not extra languages.

Vocabulary boosting
Up to 100 keywords; intensifier defaults to 1, recommended 1–3Source for Vocabulary boosting (opens in a new tab)
Transcript redaction
PII and payment-data redaction are documented as effective for English and HindiSource for Transcript redaction (opens in a new tab)

Acceptance of the flag on another language does not prove reliable redaction.

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 13 Oct 2026
CategoryUsageRateUnit
Speechpublished payg1$0.004audio minute
Speechcompare page rate2$0.008audio minute
Speechmay billing notice3$0.006audio minute

Rate conditions

  1. Approximate marketing rate, also shown on the Pulse card. Conflicts with the compare-models page and dated billing change; confirm the account rate.
  2. Conflicting Standard-plan rate on the official comparison page; not an additional charge and not treated as a settled current tariff.
  3. Historical May 28, 2026 billing notice. Later undated pricing surfaces differ; shown for reconciliation, not added to other rates.
Pricing source (opens in a new tab)Pricing source (opens in a new tab)Pricing source (opens in a new tab)

Data & enterprise terms

Content is retained unless an eligible Enterprise data policy is enabled. Options: no content storage, a 24-hour to 90-day window, or x-expire-content: true for seven-day expiry. On other plans the header is ignored. Billing/usage metadata remains; settings are not retroactive. TTS saved history is excluded from window expiry. Speech-to-speech and cloning are not expressly covered.

Read the service policy (opens in a new tab)

Smallest AI licensed self-host

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

No pinned inference selector verified for this access route.

Access
Commercial self-host deployment. Confirm the licensed image/checkpoint and supported language set with Smallest.
Regions
Customer-managed infrastructure

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

Data & enterprise terms

Inference runs on customer infrastructure. A license proxy needs outbound access for license validation and usage reporting; do not assume fully air-gapped operation.

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.

Smallest AI API

pulse
Not verified

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

How it works
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Minimum reusable input
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Lifetime & refresh
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

How to enable it
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Usage fields
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Billing rules
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Limits & data boundaries
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

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

Smallest AI API

pulse
Not verified

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

How it works
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Minimum reusable input
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Lifetime & refresh
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

How to enable it
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Usage fields
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Billing rules
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Limits & data boundaries
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

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

Smallest AI licensed self-host

Not verified

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

How it works
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Minimum reusable input
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Lifetime & refresh
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

How to enable it
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Usage fields
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Billing rules
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

Limits & data boundaries
Not collected

No discounted prompt-cache contract verified for this model/access route. Audio continuity and model-weight storage are separate features.

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

Smallest retains rights in its AI models and prohibits model extraction. Its model cards name Smallest as developer; Electron, Hydra and Lightning v3.1 explicitly use proprietary licenses. Commercial self-hosting requires licensed artifacts and a license proxy, not an open-weight grant.

Classification evidence (opens in a new tab)

Sources reviewed