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What exists today is the honest, working surface documented throughout these docs: tts.create, tts.stream, voices, models, health, the OpenAI-compatible /v1/audio/speech endpoint, and CORS for browser callers — with a typed SDK and CLI.
The items below are planned, not yet available. Nothing here is callable today — this page exists so you can plan around it. Track progress on GitHub.

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More output formats

Native MP3, Opus, and 8 kHz µ-law (telephony) alongside WAV/PCM, via the response_format parameter — smaller payloads and no client-side transcoding. Until then, convert with ffmpeg. Today the API returns WAV (24 kHz, PCM16); the OpenAI-compatible endpoint also supports raw pcm.

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Python SDK

A geko Python package mirroring this SDK’s surface (geko.tts.create(...), geko.tts.stream(...)), for Python-first backends and agents. Today the official SDK is TypeScript/JavaScript (@gekoai/sdk).

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Word / character timestamps

Optional alignment data for captions, subtitles, and highlight-as-it-speaks UIs.

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More languages & voices

Tokay is Kazakh today. New languages and voices appear on the same endpoints — GET /v1/models and GET /v1/voices are the source of truth, so code that reads them adapts automatically.
Want one of these sooner, or have a use case that needs it? Open an issue on GitHub — it genuinely helps prioritize.