TTS API price reference

Aivis Cloud API

Official pricing is JPY only (440 yen tax-included per 10,000 characters, prepaid credits), so this engine is listed for reference and excluded from USD ranking and estimates. Aivis Premium (1,980 yen/month) currently has no monthly character limit; 500 free credits on signup.

characters: ¥44,000 / 1M characters

Eleven Flash/Turbo

characters: $50 / 1M characters

Eleven Multilingual v2/v3

characters: $100 / 1M characters

Gemini 2.5 Flash Preview TTS

input: $0.5 / 1M tokens

audio output: $10 / 1M tokens

Gemini 2.5 Pro Preview TTS

input: $1 / 1M tokens

audio output: $20 / 1M tokens

Gemini 3.1 Flash TTS Preview

input: $1 / 1M tokens

audio output: $20 / 1M tokens

Gradium TTS

S plan additional credits

Credit subscription only: 1 credit = 1 character. Plans $13-$1,615/month include 225k-45M credits; additional credits cost $6.90 (Free) down to $3.80 (L) per 100k characters. The listed price is the S plan ($43/month) additional-credit rate. Listed for reference because a usage-only estimate would omit the monthly base fee.

characters: $50 / 1M characters

Realtime TTS 1.5 Max

On-demand

characters: $35 / 1M characters

Realtime TTS 1.5 Mini

On-demand

characters: $15 / 1M characters

Realtime TTS-2

On-demand

characters: $25 / 1M characters

Speech 2.6 HD

characters: $100 / 1M characters

Speech 2.6 Turbo

characters: $60 / 1M characters

Speech 2.8 HD

characters: $100 / 1M characters

Speech 2.8 Turbo

characters: $60 / 1M characters

GPT-4o mini TTS

Comparison page only: no official character-to-audio-token or per-minute conversion is published.

input: $0.6 / 1M tokens

audio output: $12 / 1M tokens

TTS-1

characters: $15 / 1M characters

TTS-1 HD

characters: $30 / 1M characters

Unreal Speech TTS

Basic plan overage

Subscription-only: no pay-as-you-go plan exists. $49/month Basic includes 3M characters; overage $16/1M characters, falling to $8/1M on the $4,999/month Enterprise plan (625M included). Listed for reference because a usage-only estimate would omit the monthly base fee.

characters: $16 / 1M characters

xAI Text-to-Speech

characters: $15 / 1M characters