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light estimateLast updated 2026-08-20

OpenAI vs MiniMax

OpenAI gpt-4o-mini-tts vs MiniMax Speech 2.5 Turbo for text-to-speech. Computed from public benchmarks with dated sources; updated 2026-08-20.

Head to head
OpenAI gpt-4o-mini-tts compared with MiniMax Speech 2.5 Turbo per decision axis
AxisOpenAI gpt-4o-mini-ttsMiniMax Speech 2.5 TurboEdge
Price$15 per 1M chars*$78 per 1M chars—
ELO———
TTFA775 ms——
Langs50——
streaming✓✓—
cloning—✓—

* token-/credit-priced — the headline understates real per-unit cost, so no price edge is awarded.

Strengths & caveats
OpenAICheap, developer-friendly, with steerable tone/emotion via a free-text 'instructions' parameter and tight integration into the OpenAI stack; ~11-13 built-in voices. Token-based pricing (unchanged at $0.60/1M text input tokens + $12/1M audio output tokens); the ~$15/1M-chars figure is a community estimate, so vergelijkbaar=false — note OpenAI's older tts-1 is separately listed at a real $15/1M characters, which is easy to confuse with it. Not ranked on the Arena: gpt-4o-mini-tts does not appear among the 99 leaderboard models, where OpenAI is represented only by tts-1, tts-1-hd and GPT-Realtime-2. Independent Coval TTFA is 775ms P50, the slowest in this table apart from ElevenLabs Multilingual v2. The ~50-language claim is vendor-stated and was not re-verified in this refresh. No voice cloning.MiniMaxStrong multilingual quality with accurate voice replication; the HD tier ranks in the upper part of the Artificial Analysis Speech Arena, and pricing is clean per-character. Per-character pricing differs sharply by tier: Turbo ~$78/1M vs HD ~$130/1M, and the ELO-ranked variant is the more expensive HD model — so the cheapest tier and the benchmarked tier are not the same. No independent TTFA; flagship-specific ELO and language count not confirmed (left null).
Sources