Models and voices | Talkif Docs

The catalogue below is generated from the platform’s live model list — the same one the builder’s provider nodes show and the same rates the billing engine applies. Prices are per unit as billed: STT per minute of audio, LLM per million tokens (input and output separately), TTS per thousand characters synthesized. How those units turn into a call’s cost is in Credits and pricing; how to choose between them is in Choose models and voices.

Voices aren’t listed here — each TTS provider has hundreds, and the list is live in the builder’s voice selector (or GET /models/tts/voices).

Speech-to-text

AWS

Model	Per minute
`transcribe`	$0.0240

Cartesia

Model	Per minute
`ink-whisper`	$0.0022

Deepgram

Model	Per minute
`nova-3-general`	$0.0092
`nova-3-medical`	$0.0077
`nova-2-general`	$0.0058
`nova-2-conversationalai`	$0.0058
`nova-2-phonecall`	$0.0058

ElevenLabs

Model	Per minute
`scribe_v2_realtime`	$0.0042

Soniox

Model	Per minute
`stt-rt-v5`	$0.0020

xAI

Model	Per minute
`grok-stt`	$0.0033

Language models

Anthropic

Model	Input / 1M tokens	Output / 1M tokens
`claude-opus-5`	$5.00	$25.00
`claude-sonnet-5`	$2.00	$10.00
`claude-haiku-4-5`	$1.00	$5.00

Google

Model	Input / 1M tokens	Output / 1M tokens
`gemini-3.5-flash`	$1.50	$9.00
`gemini-3.1-pro-preview`	$2.00	$12.00
`gemini-3.1-flash-lite`	$0.25	$1.50
`gemini-3-flash-preview`	$0.50	$3.00

Grok

Model	Input / 1M tokens	Output / 1M tokens
`grok-4.5`	$2.00	$6.00

OpenAI

Model	Input / 1M tokens	Output / 1M tokens
`gpt-5.6-sol`	$5.00	$30.00
`gpt-5.6-terra`	$2.00	$12.00
`gpt-5.6-luna`	$0.20	$1.20
`gpt-5.5`	$5.00	$30.00
`gpt-5.4`	$2.50	$15.00
`gpt-5.4-mini`	$0.75	$4.50
`gpt-5.4-nano`	$0.20	$1.25
`gpt-5.2`	$1.75	$14.00
`gpt-5.1`	$1.25	$10.00
`gpt-5`	$1.25	$10.00
`gpt-5-mini`	$0.25	$2.00
`gpt-4.1`	$2.00	$8.00
`gpt-4.1-mini`	$0.40	$1.60
`gpt-4.1-nano`	$0.10	$0.40
`gpt-4o`	$2.50	$10.00
`gpt-4o-mini`	$0.15	$0.60

Some models don’t accept a temperature; the builder hides the setting for those. Reasoning-style models add thinking time before each reply — better for post-call analysis than for live conversation.

Text-to-speech

Cartesia

Model	Per 1K characters
`sonic-turbo`	$0.0374
`sonic-2`	$0.0374
`sonic-3`	$0.0374

ElevenLabs

Model	Per 1K characters
`eleven_flash_v2_5`	$0.0500
`eleven_v3_conversational`	$0.0500
`eleven_turbo_v2_5`	$0.0500

Google

Model	Per 1K characters
`gemini-2.5-flash-tts`	$0.0170
`gemini-2.5-pro-tts`	$0.0340

Rime

Model	Per 1K characters
`mistv2`	$0.0300
`arcana`	$0.0400

xAI

Model	Per 1K characters
`grok-tts`	$0.0150

Telephony

Provider	Inbound / min	Outbound / min
SIP Trunking	$0.0040	$0.0040
Twilio	$0.0085	$0.0140
WhatsApp	Free	Free

By API

GET /models returns the same catalogue as JSON, including each model’s capabilities — use it if you build flows programmatically and want to validate a model before publishing.