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No monthly fee. Purchase credits and use them at your own pace. Credits never expire.
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Per-call cost breakdown visible as it happens. LLM, TTS, STT, and telephony itemized.
* Estimate based on ~6 turns/min, ~4,800 input + ~80 output tokens/min, ~700 TTS chars/min.
* Twilio rate is for US local calls. Rates vary by region, mobile vs. landline, and toll-free. See Twilio pricing
| Model | Input / 1K | Output / 1K |
|---|---|---|
| gpt-4.1 | $0.0020 | $0.0080 |
| gpt-4.1-mini | $0.0004 | $0.0016 |
| gpt-4.1-nano | $0.0001 | $0.0004 |
| gpt-4o | $0.0025 | $0.0100 |
| Model | Input / 1K | Output / 1K |
|---|---|---|
| claude-3-5-haiku | $0.0001 | $0.0005 |
| claude-3-5-sonnet | $0.0003 | $0.0015 |
| claude-haiku-4-5 | $0.0010 | $0.0050 |
| claude-opus-4 | $0.0015 | $0.0075 |
| Model | Input / 1K | Output / 1K |
|---|---|---|
| gemini-2.0-flash | $0.0001 | $0.0004 |
| gemini-2.0-flash-lite | $0.0001 | $0.0003 |
| gemini-2.5-flash | $0.0003 | $0.0025 |
| gemini-2.5-flash-lite | $0.0001 | $0.0004 |
| Model | Input / 1K | Output / 1K |
|---|---|---|
| grok-3 | $0.0003 | $0.0015 |
| grok-3-mini | $0.0000 | $0.0001 |
| grok-4 | $0.0003 | $0.0015 |
| grok-4-1-fast-non-reasoning | $0.0000 | $0.0001 |
| Model | Input / 1K | Output / 1K |
|---|---|---|
| gpt-4.1 | $0.0100 | $0.0300 |
See exactly what each call costs: LLM tokens, TTS characters, STT minutes, and telephony time.
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