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InworldVoice

Inworld TTS-1.5 Max

Game-ready character voices from Inworld, at the lowest price here.

voice/inworld-tts-1.5-max
Try it in StudioUse with your agent or API

Pixie, grove sprite

Oh! A visitor! Nobody ever finds the hidden grove. Quick, follow the glowing mushrooms before the owls wake up!

Price
0.84 credits / minute
Typical time
about 4 s
Makes
Text to speech

Best for

Inworld TTS-1.5 Max is Inworld's speech model, built for characters in games. It offers 113 voices across 15 languages, including stylized fantasy voices, at the lowest price of the speech models on Summer.

  • NPC voices for large casts, one voice per character.
  • Fantasy and villain voices such as Hades and Dominus.
  • High volume dialogue where cost per line matters.

Put it together

Where Inworld TTS-1.5 Max fits in a game, with the models it works well with. Your agent runs every step.

Price

ModeModelPrice
Text to speechInworld TTS-1.5 Max0.84 credits / minute

Paid from your Summer credits.

Use it from code or your agent

Sign in once with summer login. Your agent or your code then runs it with your paid credits.

npx -y summer-engine@latest login
npx -y summer-engine@latest api run voice/inworld-tts-1.5-max \
  --input '{"text":"The gate opens at dawn. Bring the lantern.","voiceId":"Olivia (en)"}' \
  --download .

voice/inworld-tts-1.5-max: $0.01 per 1,000 characters. Paid from your Summer credits.

Inputs

What input takes for voice/inworld-tts-1.5-max. Send only what you need; Summer fills in tested defaults.

  • textstringRequired · up to 2000 characters

    The words to speak, at most 2000 characters.

  • voiceIdstringup to 100 characters

    Speech: a voice of the game cast.

  • voiceSettingsobject

    Speech: voice tuning.

    Show 5 child parameters
    • voiceSettings.stabilitynumber0 to 1
    • voiceSettings.similarityBoostnumber0 to 1
    • voiceSettings.stylenumber0 to 1
    • voiceSettings.speednumber0.7 to 1.2
    • voiceSettings.useSpeakerBoostboolean

Model docs · Summer API docs · Set up the Summer MCP server · Try it in the browser

Questions

What is Inworld TTS-1.5 Max good for in game development?
Inworld TTS-1.5 Max is Inworld's speech model, built for characters in games. It offers 113 voices across 15 languages, including stylized fantasy voices, at the lowest price of the speech models on Summer. Typical game uses: NPC voices for large casts, one voice per character; fantasy and villain voices such as Hades and Dominus; high volume dialogue where cost per line matters.
How much does Inworld TTS-1.5 Max cost in Summer?
Inworld TTS-1.5 Max costs 0.84 credits / minute in Summer Studio. It is charged from your Summer credits.
What kind of audio can Inworld TTS-1.5 Max make?
In Summer, Inworld TTS-1.5 Max is used for text to speech.
Can I use Inworld TTS-1.5 Max from Claude Code, Cursor or Codex?
Yes. Connect the Summer MCP server to Claude Code, Cursor, Codex or another MCP client, then ask your agent to generate with summer_generate_audio with capability: "text_to_speech", modelId: "inworld-tts-1.5-max". Setup instructions are at summerengine.com/mcp.
Where do Inworld TTS-1.5 Max results go?
Every generation is saved to your Summer asset library. From there you can download it or bring it into a Summer Engine project.