MiniMax Speech 2.6 API — HD Text-to-Speech at 40% Off List

The MiniMax Speech 2.6 API turns text into HD audio across 40 languages, with per-request input up to 10,000 characters and seven built-in emotions. On GPTProto you call the speech-2.6-hd model at $60 per 1M output tokens with input tokens free — 40% off the list price, using one API key and one shared balance across 200+ models. No separate MiniMax account and no region-gated sign-up. Browse all models to see what else runs on the same key.

What the MiniMax Speech 2.6 HD Model Does

speech-2.6-hd is the high-fidelity variant of the MiniMax Speech 2.6 family, tuned for narration, audiobooks, and brand voiceover where timbre detail and prosody matter. Against MiniMax Speech 02 it improves multilingual similarity, rhythm, and voice-cloning accuracy, and covers 40 languages with dialect handling. The "HD" route targets fidelity; the Turbo route in the same family targets lowest latency. On GPTProto you reach the HD model through the MiniMax Speech 2.6 API without managing a MiniMax account directly.

Long-Form Narration and Audiobooks

For publishing and e-learning, speech-2.6-hd accepts up to 10,000 characters per request (streaming output is recommended above 3,000 characters) and holds a consistent voice across long passages. Its 40-language coverage and per-request emotion control (happy, sad, angry, fearful, disgusted, surprised, neutral) let one pipeline produce multilingual audiobooks, courseware, and read-aloud accessibility tracks. Long scripts should be segmented and streamed rather than sent as a single block.

Voice Agents and Support Scripts

Speech 2.6 reads dynamic text the way an agent needs it: URLs, email addresses, phone numbers, dates, and currency amounts are verbalized correctly without pre-processing (for example $1,234.56 → "one thousand two hundred thirty-four dollars and fifty-six cents"). speech-2.6-hd supports streaming PCM output for responsive playback. If your priority is the lowest possible latency, GPTProto also lists speech-2.5-turbo-preview on the same key — the HD route trades a little speed for higher fidelity.

Why Call MiniMax Speech 2.6 Through GPTProto

Going direct to MiniMax means a separate account, per-character billing, and a region-gated sign-up. GPTProto gives you the same speech-2.6-hd model behind one API key and one prepaid balance shared across 200+ text, image, video, and audio models. You top up once and spend it anywhere, monitor usage in one dashboard, and keep the model string identical if you later migrate. Access value, not a rewrite of the model.

What Is MiniMax Speech 2.6?

MiniMax Speech 2.6 is a text-to-speech (TTS / text-to-audio) model family announced on October 30, 2025, built for voice agents, multilingual narration, and correct reading of non-standard text. It ships in two routes: HD (fidelity-focused) and Turbo (low-latency). GPTProto exposes the HD route as speech-2.6-hd through the MiniMax Speech 2.6 text-to-speech API. The table below is the working spec for speech-2.6-hd.

MiniMax Speech 2.6 HD vs 2.5 HD vs 2.5 Turbo

All three run on GPTProto under the same key, so you can A/B them on your own scripts. Speech 2.6 improves multilingual similarity, rhythm, and non-standard-text handling over the 2.5 line; the 2.5 Turbo route stays the fastest option.

Short version: pick 2.6 HD for the most natural narration and correct reading of messy text; keep 2.5 HD only if a workflow is already tuned to it — it's the same $60 output rate, so 2.6 HD is the default; use 2.5 Turbo at $36 / 1M output tokens when turn-taking speed and cost matter more than fidelity.

Voices, Emotions, and Language Coverage

speech-2.6-hd exposes system voices and cloned voices via voice_id, plus per-request control over delivery:

• Emotion — one of seven: happy, sad, angry, fearful, disgusted, surprised, neutral.
• Speed — 0.5–2.0 (default 1.0).
• Volume — >0–10 (default 1.0).
• Pitch — -12–+12 in integer steps (default 0, original timbre).
• Pauses — insert <#x#> between words to set a silence of x seconds (0.01–99.99).
• Text normalization — auto-reads URLs, email addresses, phone numbers, dates, and money.

The model covers 40 languages with inline switching in mixed-language text, and language_boost biases a primary language when input mixes scripts. Voice cloning takes a ~10-second reference; Fluent LoRA keeps cloned voices fluent even from accented or disfluent samples.

Switching from Official MiniMax to GPTProto

If you already call MiniMax's /v1/t2a_v2 route, moving to GPTProto is an access change, not a model change — the model string stays speech-2.6-hd. You swap the base URL and auth to GPTProto (see the Quick Start above for the exact endpoint and request shape), then bill from your shared GPTProto balance instead of a MiniMax account. What you gain:

• One key, one balance across 200+ models — no per-provider accounts.
• No region-gated sign-up — relevant if MiniMax's platform sign-up is friction in your market.
• Input tokens free, output at $60 / 1M — 40% off the list rate shown on the model card.

Voice IDs, emotion, and audio settings map to the same request fields; confirm any provider-specific field names in the Quick Start before cutting over production traffic.