ctxdexSynthetic model data for learning
Active modelProprietaryGeneral Purpose4

Ctxdex Frontier 4

Agent MakersCtxdex Frontier

A fourth-generation multimodal general-purpose model in the Ctxdex Frontier family for complex reasoning, code generation, general language generation, and multimodal understanding.

AcceptsAudio, Image, Text, VideoProducesAudio, TextReleasedAnnounced
View pricing

The pricing calculator is not yet built.

Data captured as of

Overview

Intended useBest suited for complex reasoning, code generation, general language generation, multimodal understanding, and tool-enabled workflows.
FamilyCtxdex FrontierLong-lived flagship frontier intelligence 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 (3)

Explicit Reasoning
Intrinsic explicit/deliberate reasoning support.
Structured Output
Intrinsic support for constrained/structured machine-readable output.
Tool Calling
Intrinsic support for requesting/invoking external tools/functions.

Tasks (4)

Code GenerationComplex ReasoningGeneral Language GenerationMultimodal Understanding

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
  • ImageRaster Image
  • TextChat Messages
  • VideoVideo Clip

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.

Maximum context tokens256000
Maximum native output tokens24000
Architecture classDENSE_TRANSFORMER

Availability

Current offering available

Agent Makers

First Party Managed Api

Active offering
Effective from

Serving surfaces

Batch API · ActiveInference API · Active

Astavra Enterprise AI

Enterprise Managed Ai

Active offering
Effective from

Serving surfaces

Inference API · Active

Nimbrex Cloud

Cloud Managed Model

Active offering
Effective from

Serving surfaces

Batch API · ActiveInference 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
Output Tokens Per SecondSteady generated text-token rate after first token.86.8Token Per Second
Capacity Mode: SHARED_ON_DEMANDDelivery Mode: STREAMINGProcessing Tier: STANDARDConcurrency Band: C1Output Size Band: ~512_TOKENS
Output Tokens Per SecondSteady generated text-token rate after first token.93.0Token Per Second
Capacity Mode: SHARED_ON_DEMANDDelivery Mode: STREAMINGProcessing Tier: STANDARDConcurrency Band: C1Output Size Band: ~512_TOKENS
Time To First Token MsLatency from accepted request/start of generation to first generated text token.265Ms
Capacity Mode: SHARED_ON_DEMANDDelivery Mode: STREAMINGInput Size Band: ~4K_TOKENSProcessing Tier: STANDARDConcurrency Band: C1
Time To First Token MsLatency from accepted request/start of generation to first generated text token.235Ms
Capacity Mode: SHARED_ON_DEMANDDelivery Mode: STREAMINGInput Size Band: ~4K_TOKENSProcessing Tier: STANDARDConcurrency Band: C1

Pricing Reference

Reference offering

Agent Makers · First Party Managed Api

Effective fromCaptured as of
MeterBasisRate
InputAudited base input-token rate$1.8 / 1000000Token
OutputAudited base output-token rate$9.5 / 1000000Token
Cached InputAudited base cached-input-token rate$0.27 / 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.

2 other current offerings are priced separately. This is the publisher's own offering, chosen as the reference — it is not the cheapest by definition. 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.

14 events3 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
    PricingNormalUpcoming

    Astavra Enterprise AI pricing scheduled

    Offering context: Astavra Enterprise AI

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

  • Effective from
    PricingNormalUpcoming

    Nimbrex Cloud pricing scheduled

    Offering context: Nimbrex Cloud

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

  • Effective from
    AvailabilityNormal

    Nimbrex Cloud · Cloud Managed Model: Active

    Offering context: Nimbrex Cloud

    Synthetic commercial activation.

  • Effective from
    AvailabilityMajor

    Astavra Enterprise AI · Enterprise Managed Ai: Active

    Offering context: Astavra Enterprise AI

    Synthetic commercial activation.

  • Effective from
    PricingNormal

    Astavra Enterprise AI pricing became effective

    Offering context: Astavra Enterprise AI

    Version current, effective from 2026-04-10.

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 2026-02-24.

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-5.6 Terra

OpenAI

Provider documentation
DirectGeneral PurposeReasoningCodingTools

Selected as a direct current reference for Ctxdex Frontier 4 based on general purpose, reasoning, coding, tools.

Checked 2026-09-14 · High confidence

Claude Sonnet 5

Anthropic

Provider documentation
CloseAgentic WorkCodingProfessional Work

Selected as a close current reference for Ctxdex Frontier 4 based on agentic work, coding, professional work.

Checked 2026-09-14 · High confidence

Gemini 3.8 Flash

Google

Provider documentation
CloseCodingAgentsEnterprise WorkflowsMultimodal

Selected as a close current reference for Ctxdex Frontier 4 based on coding, agents, enterprise workflows, multimodal.

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.