ctxdexSynthetic model data for learning
Deprecated modelProprietaryReasoning2

Ctxdex Reasoning 2

Agent MakersCtxdex Reasoning

A second-generation reasoning model in the Ctxdex Reasoning family for complex reasoning and general language generation.

AcceptsTextProducesTextReleasedAnnouncedDeprecated
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The pricing calculator is not yet built.

Data captured as of

This model is deprecated
The recorded replacement is Ctxdex Frontier 4 Pro. Its offerings remain deprecated rather than withdrawn: they are still recorded, still effective-dated, and still priced. That is not the same as being unavailable.

Overview

Intended useBest suited for complex reasoning and general language generation.
FamilyCtxdex ReasoningDedicated deliberate-reasoning family later superseded by unified frontier models.
AnnouncedAnnounced
DeprecatedDeprecated
RetiredNot applicableModel is not retired.

What it does

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

Capabilities (2)

Explicit Reasoning
Intrinsic explicit/deliberate reasoning support.
Structured Output
Intrinsic support for constrained/structured machine-readable output.

Tasks (2)

Complex ReasoningGeneral Language Generation

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

  • TextChat Messages

Produces

  • 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 tokens128000
Maximum native output tokens24000

Availability

Deprecated offerings only

Agent Makers

First Party Managed Api

Deprecated offering
Effective from

Serving surfaces

Inference API · Deprecated

Nimbrex Cloud

Cloud Managed Model

Deprecated offering
Effective from

Serving surfaces

Inference API · Deprecated
Historical offeringsNone recorded
Downloadable distributionsNone recordedNo downloadable artefact has been published under these terms.

Serving Performance

Measured as of

Recorded values, on an offering that is no longer current. They are measurements, not a current recommendation.

Measurement basis Synthetic ProfileMetrics 4
MetricTypical valueConditions
Output Tokens Per SecondSteady generated text-token rate after first token.54.4Token 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.51.8Token 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.600Ms
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.535Ms
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 fromEffective toCaptured as of
MeterBasisRate
InputInput tokens$3.4 / 1000000Token
OutputOutput tokens$13.6 / 1000000Token
Cached InputCached input tokens$0.68 / 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.

These rates are still recorded and still effective-dated, on a deprecated offering. They are not withdrawn, and they are not a current recommendation. 1 other current offering is 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.

12 events1 scheduled ahead
  • Effective from
    PricingNormalUpcoming

    Agent Makers pricing scheduled

    Offering context: Agent Makers

    Scheduled to take effect on 2026-10-01. Not yet effective.

  • Effective from
    ModelMajor

    Model status changed to Deprecated

  • Effective from
    AvailabilityNormal

    Agent Makers · First Party Managed Api: Deprecated

    Offering context: Agent Makers

    Synthetic provider deprecation.

  • Effective from
    AvailabilityNormal

    Nimbrex Cloud · Cloud Managed Model: Deprecated

    Offering context: Nimbrex Cloud

    Synthetic provider deprecation.

  • Effective from
    SuccessionMajor

    Recommended successor: Ctxdex Frontier 4 Pro

  • Effective from
    PricingNormal

    Agent Makers pricing became effective

    Offering context: Agent Makers

    Version current, effective from 2026-01-01.

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

Successor Of

Ctxdex Reasoning 1

Replaced by

Replaced by

Ctxdex Frontier 4 Pro

Effective from

Lifecycle history: Active on 2025-06-17, then Deprecated on 2026-03-17.

Similar Industry Models, as last compared

Captured as of

A positioning reference drawn while this model was current, and not maintained since — superseded on 2026-09-14. Each row states the axes it was drawn on.

Claude Opus 5

Anthropic

Provider documentation
Frontier General PurposeReasoning

Broadly comparable on general-purpose language work and complex reasoning.

GPT-5.6 Sol

OpenAI

Provider documentation
Frontier General PurposeReasoning

Broadly comparable on general-purpose language work and complex reasoning.

Comparison method ctxdex-industry-comparable-method-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.