ctxdexSynthetic model data for learning
Active modelProprietaryAudio Generation2Realtime

Ctxdex Speech 2 Realtime

Agent MakersCtxdex Speech

A second-generation realtime audio model in the Ctxdex Speech family for speech-to-speech interaction, speech recognition and transcription, and text-to-speech synthesis.

AcceptsAudio, TextProducesAudio, TextReleasedAnnounced
View pricing

The pricing calculator is not yet built.

Data captured as of

Overview

Intended useBest suited for speech-to-speech interaction, speech recognition and transcription, and text-to-speech synthesis.
FamilyCtxdex SpeechSpeech recognition, synthesis and realtime audio family.
AnnouncedAnnounced
DeprecatedNot applicableModel is current.
RetiredNot applicableModel is not retired.

What it does

Capabilities carry their support status; tasks are labels, because seven descriptions would bury the section.

Capabilities (0)

None recordedNo capability is recorded for this model.

Tasks (3)

Speech RecognitionSpeech To SpeechText To Speech

Inputs & Outputs

Each modality is paired with the representation it is carried in, so a non-token model reads the same way a text one does.

Accepts

  • AudioSpeech Audio
  • TextChat Messages

Produces

  • AudioSpeech Audio
  • TextPlain Text

Technical Characteristics

A characteristic with no value states why it has none. An absence here is a recorded fact, not a gap in the page.

Architecture classAUDIO_TRANSFORMER

Availability

Current offering available

Agent Makers

First Party Managed Api

Active offering
Effective from

Serving surfaces

Audio Generation API · Active
Historical offeringsNone recorded
Downloadable distributionsNone recordedNo downloadable artefact has been published under these terms.

Serving Performance

Measured as of

Every figure is measured under the conditions beside it. Read without them, a latency number claims more than it can.

Measurement basis Synthetic ProfileMetrics 4
MetricTypical valueConditions
Audio Processing Realtime FactorProcessing time divided by input-audio duration; lower is faster.0.245Ratio
Capacity Mode: SHARED_ON_DEMANDDelivery Mode: SYNCHRONOUSProcessing Tier: STANDARDConcurrency Band: C1
First Audio Response MsLatency to first generated audio response.190Ms
Capacity Mode: SHARED_ON_DEMANDDelivery Mode: REALTIMEInput Size Band: 5S_AUDIO_TURNProcessing Tier: STANDARDConcurrency Band: C1
First Transcript Response MsLatency to first transcript/recognition result for streaming speech recognition.155Ms
Capacity Mode: SHARED_ON_DEMANDDelivery Mode: STREAMINGInput Size Band: 60S_AUDIOProcessing Tier: STANDARDConcurrency Band: C1
Turn Response Latency MsEnd-to-end conversational turn response latency under a defined turn workload.400Ms
Capacity Mode: SHARED_ON_DEMANDDelivery Mode: REALTIMEInput Size Band: 5S_AUDIO_TURNProcessing Tier: STANDARDConcurrency Band: C1

Pricing Reference

Reference offering

Agent Makers · First Party Managed Api

Effective fromCaptured as of
MeterBasisRate
Audio InputAudited audio-input minute rate$0.006 / 1Minute
Audio OutputAudited audio-output minute rate$0.045 / 1Minute
InputAudited text-input rate for realtime/speech context$0.4 / 1000000Token
View all pricing

Full pricing for a single offering is one step further in, from this model’s pricing page, because it is addressed by offering and this page carries the model. The calculator is disabled because it is not built.

The meters below are on 2 different units and cannot be summed into a single rate. Rates are not comparable across offerings unless meter, unit and conditions match.

Derived chronology

Model Journey

Assembled from this model’s own lifecycle records, its snapshots, its providers’ offering and pricing history, and recorded succession. It is a view over those records, not a second source of truth, and undated lineage is deliberately not on it.

4 events1 scheduled ahead
  • Effective from
    PricingNormalUpcoming

    Agent Makers pricing scheduled

    Offering context: Agent Makers

    Scheduled to take effect on 2026-09-15. Not yet effective.

  • Effective from
    AvailabilityMajor

    Agent Makers · First Party Managed Api: Active

    Offering context: Agent Makers

    Synthetic commercial activation.

  • Effective from
    PricingNormal

    Agent Makers pricing became effective

    Offering context: Agent Makers

    Version current, effective from 2026-06-20.

  • Effective from
    ModelMajor

    Model released

Open full journey →

The first control expands this section in place, without filters or navigation. The second opens the standalone journey, which adds filtering on three axes, year grouping, per-event provenance and a shareable address.

Every date is the source record’s own effective date — a model lifecycle date, a snapshot release, an offering’s effective date, a pricing version’s effective-from. None of them is a load or capture timestamp.

Licence & Use Conditions

LicenceAgent Makers Proprietary Model Terms
Version1.0
SPDX identifierNot applicableSPDX identifies open-source licences; these are proprietary terms.
Legal textNo public URI recordedThe terms exist and are held internally; no public address has been published.Captured as of

Use conditions (0)

None recordedNo condition constrains use of this model beyond its licence.

Lifecycle & Lineage

Direct lineage

None recordedNo lineage relationship is recorded for this model.

Recommended replacement for

None recordedNo replacement recommendation is recorded in either direction.

Lifecycle history: Active on 2026-06-16.

Similar Industry Models

Captured as of

A positioning reference, not an equivalence claim. Each row states the axes it was drawn on, and covers only that part of this model's positioning.

GPT-Live-1

OpenAI

Provider documentation
CloseRealtime SpeechFull Duplex

Selected as a close current reference for Ctxdex Speech 2 Realtime based on realtime speech, full duplex.

Checked 2026-09-14 · High confidence

Gemini 3.1 Flash Live

Google

Provider documentation
CloseAudio To AudioRealtime Dialogue

Differences recorded: Preview.

Selected as a close current reference for Ctxdex Speech 2 Realtime based on audio to audio, realtime dialogue.

Checked 2026-09-14 · High confidence

Eleven v3 Conversational

ElevenLabs

Provider documentation
CloseLow Latency Speech GenerationConversation

Selected as a close current reference for Ctxdex Speech 2 Realtime based on low latency speech generation, conversation.

Checked 2026-09-14 · High confidence

Comparison method CTXDEX_COMPARABLES_V1.

Resolved from the ctxdex catalogue at build time. Every figure is a stored value or a derivation named in the read model; nothing on this page is computed in the browser.