Skip to main content
Allgate
Canvas Start free
MODEL LIBRARY

StepFun (Global)stepfun-ai / step-tts-2

Step TTS 2

Speech generation model for controllable voice, narration, and audio delivery

Provider
StepFun (Global) (stepfun-ai)
Model identifier
step-tts-2
Library category
Audio
Source update
2026-07-02
Release date
2026-03-01
Provider documentation
https://platform.stepfun.ai/docs/en/overview/concept

Source pricing and conditions

Costs retain the source structure, tiers and conditions. These snapshot values are not Allgate API quotes. Cost currency and provider billing currency are separate fields; each defaults to USD when absent.

Cost currency: USD · Provider billing currency: USD. Input, output, reasoning, cache and audio token fields use the cost currency per million tokens. Explicit per-image, per-second and per-10,000-character fields retain their named units and resolution conditions.

Tier prices apply above the stated size. When tiers exist, source logic ignores the legacy context_over_200k field. Scheduled prices override stated fields within their window; omitted fields inherit base prices. Source pricing schema

No cost object is specified in this source entry.

Model metadata

Original source field names and values are preserved. False, zero, empty objects and missing values remain distinct. Missing capabilities are not inferred from a name, category or related version.

attachment
false
description
Speech generation model for controllable voice, narration, and audio delivery
family
step
id
step-tts-2
last_updated
2026-07-02
limit
context
0
output
0
modalities
input
  1. text
output
  1. audio
name
Step TTS 2
open_weights
false
provider
npm
@ai-sdk/openai
reasoning
false
release_date
2026-03-01
temperature
false
tool_call
false
type
speech

Provider reference

Provider documentation and billing metadata belong to the listed source provider. They do not describe Allgate routing or account configuration.

id
stepfun-ai
name
StepFun (Global)
doc
https://platform.stepfun.ai/docs/en/overview/concept
billing
priority
20

About this reference

This library reproduces the public llm-metadata snapshot: 592 model entries from 50 providers. This community maintained source does not independently verify every provider claim. Model identifiers belong to their listed provider; matching names from different providers remain separate entries. llm-metadata

Reference metadata does not establish Allgate availability or prices. Check the live model catalogue for current service and rates. Missing fields remain unknown. Source update dates are not substituted for release dates; retrieval dates are not model update dates. View live catalogue

Source: llm-metadata · Apache-2.0 · Retrieved · Source generated · Snapshot provenance