Voice AI Cost Calculator
Pick your stack. See the exact per-minute cost. All rates April 2026.
USD→INR ≈ ₹92.60 (live)
Default rate after trial
ThinnestAI manages the Vobiz account; answered calls only
$0.0058/min · free for early adopters
$50/1M chars · free for early adopters
$0.59/M in · $0.79/M out (free on Platform tier)
BYOK = Bring Your Own Key. You pay the provider directly; ThinnestAI charges ₹0 for that provider. The numbers below show only what ThinnestAI charges you.
Breakdown
For 1 min call · Pay-as-you-go
Platform fee · Pay-as-you-go
₹1.50000
SIP · Vobiz (managed)
₹0.60000
STT · Deepgram nova-2
(free for early adopters)
₹0.00000
TTS · Cartesia sonic-3
(free for early adopters)
₹0.00000
LLM · ThinnestAI-Stack thinnestai-stack
(Platform tier — free for users)
₹0.03392
Total₹2.13
Per-minute cost
₹2.13
charged to the customer's ThinnestAI wallet per minute
Total USD equivalent$0.0230
Platform fee₹1.50000
SIP telephony (billed)₹0.60000
STT₹0.00000
TTS₹0.00000
LLM₹0.03392
You save vs regular₹4.81150
STT — Speech to Text
| Provider | Model | Rate | Languages |
|---|---|---|---|
| AssemblyAIFree for early adopters | universal-3-pro | $0.00367/min | English (highest accuracy) |
| AssemblyAIFree for early adopters | universal-streaming | $0.0025/min | English |
| AssemblyAIFree for early adopters | universal-streaming-multilingual | $0.0025/min | Multilingual |
| Cartesia | ink-whisper | $0.003/min | English |
| DeepgramFree for early adopters | nova-2 | $0.0058/min | English |
| DeepgramFree for early adopters | nova-2-conversationalai | $0.0058/min | English (tuned for conversation) |
| DeepgramFree for early adopters | nova-2-phonecall | $0.0058/min | English (tuned for phone) |
| DeepgramFree for early adopters | nova-2-medical | $0.0058/min | English (medical) |
| DeepgramFree for early adopters | nova-3 | $0.0077/min | English |
| DeepgramFree for early adopters | nova-3-multilingual | $0.0092/min | Multilingual |
| DeepgramFree for early adopters | nova-3-medical | $0.0077/min | English (medical) |
| DeepgramFree for early adopters | flux-general-en | $0.0077/min | English |
| ElevenLabs | scribe-v2-realtime | $0.0105/min | Multilingual |
| OpenAI | whisper-1 | $0.006/min | Multilingual |
| OpenAI | gpt-4o-transcribe | $0.01/min | Multilingual (SOTA) |
| OpenAI | gpt-4o-mini-transcribe | $0.005/min | Multilingual |
| Sarvam | saarika:v2.5 | ₹0.5/min | 11 Indian |
| Sarvam | saarika:v2 | ₹0.5/min | 11 Indian |
TTS — Text to Speech
| Provider | Model | Rate (per 1M chars) | Languages / Notes |
|---|---|---|---|
| CartesiaFree for early adopters | sonic-3 | $50 | 15 languages, 200ms TTFB |
| CartesiaFree for early adopters | sonic-2 | $50 | 15 languages |
| CartesiaFree for early adopters | sonic-turbo | $50 | 40ms TTFB (fastest) |
| DeepgramFree for early adopters | aura | $15 | English |
| DeepgramFree for early adopters | aura-2 | $30 | English (premium) |
| ElevenLabs | eleven_flash_v2_5 | $150 | English (fast) |
| ElevenLabs | eleven_turbo_v2_5 | $150 | English |
| ElevenLabs | eleven_multilingual_v2 | $300 | Multilingual (premium) |
| Inworld | inworld-tts-1.5-max | $10 | English (expressive) |
| Inworld | inworld-tts-1.5-mini | $5 | English (compact) |
| OpenAI | tts-1 | $15 | English |
| OpenAI | tts-1-hd | $30 | English (HD) |
| Rime | arcana-v3 | $40 | English |
| Rime | mist-v2 | $30 | English |
| Sarvam | bulbul:v2 | ₹1500 | 11 Indian |
LLM — Language Models
| Provider | Model | Input (per 1M tokens) | Output (per 1M tokens) |
|---|---|---|---|
| ThinnestAI-StackFree on Platform | thinnestai-stack | $0.59 | $0.79 |
| OpenAI | gpt-4o-mini | $0.15 | $0.6 |
| OpenAI | gpt-4o | $2.5 | $10 |
| Sarvam | sarvam-m | Free | Free |
SIP — Telephony
| Provider | Type | Rate | Notes |
|---|---|---|---|
| Vobiz (managed) | Managed | ₹0.5/min | ThinnestAI manages the Vobiz account; answered calls only |
| Vobiz BYOK | BYOK | ₹0 from ThinnestAI | Use your own Vobiz account; ThinnestAI charges nothing for SIP |
| Twilio BYOK | BYOK | ₹0 from ThinnestAI | Use your own Twilio account |
| Plivo BYOK | BYOK | ₹0 from ThinnestAI | — |
| Telnyx BYOK | BYOK | ₹0 from ThinnestAI | — |
| Exotel BYOK | BYOK | ₹0 from ThinnestAI | — |
| Custom SIP | BYOK | ₹0 from ThinnestAI | Bring any SIP trunk — ThinnestAI only charges the platform fee |
Platform Fee Tiers
| Tier | Rate | Notes |
|---|---|---|
| Trial (first 50 min) | Free | 50 free voice minutes + 200 chat messages for every new user |
| Pay-as-you-go | ₹1.5/min | Default rate after trial |
| Enterprise | ₹1.25/min | Volume commit, starts from ₹1.25/min |
Rates effective April 2026 · Subject to revision with 30 days notice · BYOK means you bring your own API key and pay the provider directly · ThinnestAI only charges you the platform fee and any at-cost/marked-up provider passthroughs as shown