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The Humanness Index™
Built by VapiGitHub

The Humanness Index™

The open benchmark for how human voice AI sounds, so you can pick the model that passes. Built by Vapi.

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Code is Apache-2.0. Standings data is CC BY 4.0. Audio clips and source voices are licensed recordings, all rights reserved. Provider logomarks belong to their respective owners and are used nominatively. “The Humanness Index™” name and logo are Vapi trademarks; see TRADEMARKS.md.

  1. Humanness Index™
  2. ElevenLabs

Humanness Index™ · Provider

ElevenLabs

ElevenLabs

elevenlabs.io

ElevenLabs is the incumbent voice platform, with model families that span ultra low latency conversational agents to maximum expressiveness.

Best ranked model
#1 Eleven v3
Humanness
96

Standings as of Jul 28, 2026, 01:54 UTC

ElevenLabs
Models on the Index
6
Languages
32
Price / 1M chars
$50
Visit ElevenLabs

ElevenLabs models on the Humanness Index™

RankModelHumannessLatencyLanguagesPrice / 1M chars
#10Turbo v275302 msEnglish$50
#9Flash v276226 msEnglish$50
#14Flash v2.568197 ms32$50
#1Eleven v396758 ms70+$100

Previous models

RankModelHumannessLatencyLanguagesPrice / 1M chars
—Turbo v2.5—265 ms32$50
—Multilingual v2—1006 ms29$100

Compare against the full Humanness Index™ rankings

About ElevenLabs

ElevenLabs is the incumbent voice platform, with model families that span ultra low latency conversational agents to maximum expressiveness. Latency and language coverage vary sharply across those families, so every ElevenLabs model on the Humanness Index™ carries its own figures rather than one provider-wide number.

Sources: elevenlabs.io

Model families and pricing

Four ElevenLabs models compete in the arena, spanning the Turbo, Flash, and v3 families; the Multilingual v2 and Turbo v2.5 entries are retired from battles but keep their pages. ElevenLabs bills in credits: Flash and Turbo models bill one credit per two characters, while Eleven v3 and Multilingual v2 bill one credit per character, which is why those two carry a higher effective rate.

Sources: elevenlabs.io, elevenlabs.io

ElevenLabs stats

Languages
321
Price / 1M chars
$502
  1. elevenlabs.io/docs/overview/models (checked 2026-06-10) Low-latency tier default (Turbo/Flash v2.5); Turbo v2 and Flash v2 are English-only, Multilingual v2 lists 29, and Eleven v3 lists 70+, encoded per model.
  2. elevenlabs.io/pricing/api (checked 2026-06-10) ElevenAPI pay-as-you-go: Flash/Turbo $0.05 per 1k characters = $50 per 1M. Eleven v3 and Multilingual v2 bill $0.10 per 1k ($100 per 1M), encoded per model.

Other providers on the Index

CartesiaCartesiaBest ranked model #12 · Sonic 3.5xAIxAIBest ranked model #2 · Grok TTSMiniMaxMiniMaxBest ranked model #3 · Speech 2.8GradiumGradiumBest ranked model #19 · Gradium TTSCanopy LabsCanopy LabsBest ranked model #4 · OrpheusInworldInworldBest ranked model #8 · TTS-1.5-maxSmallest.aiSmallest.aiBest ranked model #17 · Lightning v3.1NeuphonicNeuphonicBest ranked model #18 · neu_hqSpeechifySpeechifyBest ranked model #7 · Simba 3.2HumanHumanBaseline reference · Humanness 100

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