Legacy speech engine still accessible to eligible workspaces pinned before API version 2026-09-21, pending a scheduled change to the model behind the ID.
Requires a workspace pinned to an API version earlier than 2026-09-21. New API versions reject this ID. Original Simba 1.6 training is scheduled to be replaced on 2026-11-21.
Regions
Deployment region and residency commitments require service-specific confirmation.
Endpoint pricing has not been collected. Check the provider for applicable rates.
Data & enterprise terms
API-specific supplemental terms reserve model IP and require rights to voice inputs. Cloning requires verified speaker consent; the consent recording is retained with the voice. No blanket zero-retention or no-training claim is inferred.
Requires a workspace pinned to an API version earlier than 2026-09-21. New API versions reject this ID. Original Simba 1.6 training is scheduled to be replaced on 2026-11-21.
Regions
Deployment region and residency commitments require service-specific confirmation.
Endpoint pricing has not been collected. Check the provider for applicable rates.
Data & enterprise terms
API-specific supplemental terms reserve model IP and require rights to voice inputs. Cloning requires verified speaker consent; the consent recording is retained with the voice. No blanket zero-retention or no-training claim is inferred.
Requires a workspace pinned to an API version earlier than 2026-09-21. New API versions reject this ID. Original Simba 1.6 training is scheduled to be replaced on 2026-11-21.
Regions
Deployment region and residency commitments require service-specific confirmation.
Endpoint pricing has not been collected. Check the provider for applicable rates.
Data & enterprise terms
API-specific supplemental terms reserve model IP and require rights to voice inputs. Cloning requires verified speaker consent; the consent recording is retained with the voice. No blanket zero-retention or no-training claim is inferred.
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.
SpeechifyAI API
simba-multilingual
Not verified
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
How it works
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Minimum reusable input
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Lifetime & refresh
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
How to enable it
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Usage fields
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Billing rules
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Limits & data boundaries
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
SpeechifyAI API
simba-multilingual
Not verified
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
How it works
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Minimum reusable input
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Lifetime & refresh
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
How to enable it
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Usage fields
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Billing rules
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Limits & data boundaries
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
No verified cache rate for this endpoint. An empty rate is not a zero charge.
SpeechifyAI API
simba-multilingual
Not verified
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
How it works
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Minimum reusable input
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Lifetime & refresh
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
How to enable it
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Usage fields
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Billing rules
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
Limits & data boundaries
Not collected
No model-specific prompt-cache API, lifetime or discount documented in reviewed sources. Voice conditioning, buffered audio and idempotency replay are not prompt caching.
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
Speechify identifies the underlying voice models as its intellectual property, grants service access rather than a public weight license, and restricts reverse engineering. The named model inventory establishes native Simba releases; voice presets and integrations are not counted as new base models.
