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Model infoModelsSnapshot: 15 Oct 2026

Perplexity / Sonar

Sonar Reasoning

Historical Perplexity managed search/reasoning tier. The service identity is documented separately from the underlying model checkpoint.

Language models (LLMs)
retiredClosed-source managed componentText generationSearch
Official documentation (opens in a new tab)Reviewed 14 Oct 2026
7 of 20 specification fields collected
Context windowNot collectedAwaiting source review
Maximum outputNot collectedAwaiting source review
Input billingNot collectedPerplexity API (historical)
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

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Maximum input tokens
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Maximum output
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Parameters
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Architecture
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Languages
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Knowledge cutoff
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Release date
2025-01-29Source for Release date (opens in a new tab)

Publication date from the official post structured metadata.

Reasoning
SupportedSource for Reasoning (opens in a new tab)
Tool calling
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Structured output
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Streaming
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Batch processing
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Fine-tuning
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Context caching
Not collected

Not verified for this exact historical release. Model names alone are not a numeric context/parameter specification; current Sonar facts are not inherited.

Input modalities
TextSource for Input modalities (opens in a new tab)
Output modalities
TextSource for Output modalities (opens in a new tab)
Search grounding
SupportedSource for Search grounding (opens in a new tab)
Release identity
sonar-reasoningSource for Release identity (opens in a new tab)

Historical API service tier; exact underlying checkpoint/weight identity unverified.

Base model
DeepSeek reasoning modelsSource for Base model (opens in a new tab)

The official post names the model family, not an exact immutable revision.

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

Perplexity API (historical)

Provider source (opens in a new tab)
API model ID
sonar-reasoning

Exact provider-listed historical selector.

Access
Removed from the API on December 15, 2025.
Regions
US data centers, according to the original provider announcement

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

Data & enterprise terms

Historical launch post says API data is not collected or shared. This is not a current Agent API policy guarantee.

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.

Perplexity API (historical)

sonar-reasoning
Not verified

Historical exact-model cache contract not verified. Current Agent API cache rates are not inherited.

How it works
Not collected

Historical exact-model cache contract not verified. Current Agent API cache rates are not inherited.

Minimum reusable input
Not collected

Historical exact-model cache contract not verified. Current Agent API cache rates are not inherited.

Lifetime & refresh
Not collected

Historical exact-model cache contract not verified. Current Agent API cache rates are not inherited.

How to enable it
Not collected

Historical exact-model cache contract not verified. Current Agent API cache rates are not inherited.

Usage fields
Not collected

Historical exact-model cache contract not verified. Current Agent API cache rates are not inherited.

Billing rules
Not collected

Historical exact-model cache contract not verified. Current Agent API cache rates are not inherited.

Limits & data boundaries
Not collected

Historical exact-model cache contract not verified. Current Agent API cache rates are not inherited.

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

Caching reviewed 14 Oct 2026

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

The provider identifies this search/reasoning API tier, but the reviewed evidence does not establish an independently released proprietary checkpoint. It is a managed component; public or third-party base models are not reclassified as closed weights.

Classification evidence (opens in a new tab)

Lifecycle dates

Official launch post29 Jan 2025Source (opens in a new tab)
Provider-confirmed API removal15 Dec 2025Source (opens in a new tab)

Sources reviewed