osmTalk Docs
Billing & Credits

Pricing & Rates

Per-provider pricing for LLM, STT, TTS, and telephony.

All prices shown are final — no hidden fees. Every rate on this page is in USD.

LLM Pricing (per 1M tokens)

OpenAI

ModelInput ($)Output ($)
GPT-5.2$0.88$7.00
GPT-5 Mini$1.25$5.00
GPT-4.1$2.00$8.00
GPT-4.1 Mini$0.40$1.60
GPT-4.1 Nano$0.10$0.40
o4-mini$1.10$4.40
GPT-4o$2.50$10.00
GPT-4o Mini$0.15$0.60

Anthropic

ModelInput ($)Output ($)
Claude Opus 4.6$5.00$25.00
Claude Sonnet 4.6$3.00$15.00
Claude Sonnet 4.5$3.00$15.00
Claude Haiku 4.5$1.00$5.00

Groq

ModelInput ($)Output ($)
LLaMA 3.3 70B$0.59$0.79
GPT-OSS 120B$0.15$0.60
Qwen 3 32B$0.29$0.59
LLaMA 3.1 8B$0.05$0.08

All rates shown are the final price charged per call. No additional fees.

STT Pricing (per minute of audio)

ProviderModelRate ($)
DeepgramNova 3$0.0056
DeepgramNova 3 Medical$0.0079
DeepgramFlux$0.0056
DeepgramNova 2$0.0047
ElevenLabsScribe v2 Realtime$0.0085

TTS Pricing (per 1K characters)

ProviderModelRate ($)
DeepgramAura 2 (all 14 voices)$0.020
ElevenLabsFlash v2.5$0.010
ElevenLabsTurbo v2.5$0.031
ElevenLabsMultilingual v2$0.100

Telephony (per minute)

TypeRate ($)
Outbound calls$0.01
Inbound calls$0.005

SIP charges apply to phone and WhatsApp voice calls only. Web/widget calls have no telephony cost.

Phone Number Charges

ChargeAmount
Monthly rental~$1.22/month (US local number)
Setup fee$0.50 one-time

Phone numbers are provisioned through Twilio. A US local number costs about $1.22/month plus a one-time $0.50 setup fee.

Minimum Charge

Every call has a minimum charge of $0.01 regardless of duration. This covers fixed costs (bot startup, voice-session setup).

Cost Examples

Web Call — 5 min, GPT-4o + Deepgram (estimated)

ComponentCalculationUSD
LLM2,400 prompt + 1,200 completion tokens$0.018
STT5 min$0.028
TTS1,800 chars$0.036
SIPN/A (web call)$0.000
Total$0.082

Phone Call — 3 min, Groq LLaMA 3.3 + Deepgram (estimated)

ComponentCalculationUSD
LLM1,500 prompt + 750 completion tokens$0.002
STT3 min$0.017
TTS1,200 chars$0.024
SIP3 min outbound$0.030
Total$0.073

Choosing Cheaper Providers

  • Groq LLaMA 3.1 8B — 50x cheaper than GPT-4o
  • Deepgram — best price-to-quality for STT/TTS
  • Web widget instead of phone — eliminates $0.005–0.01/min SIP charges