ElevenLabs Flash v2.5
ElevenLabs' ultra-low-latency TTS: 32 languages at a provider-claimed ~75ms — the model real-time voice agents reach for.
About
Flash v2.5 (model ID eleven_flash_v2_5) is ElevenLabs' speed tier for text-to-speech: 32 languages, streaming-first, with a provider-claimed ~75ms latency figure. The important footnote, which ElevenLabs' own docs state, is that 75ms refers to model inference only — end-to-end latency varies with region and endpoint, and third-party analysis consistently shows real round-trips well above the headline. It trades some of the expressive ceiling of Multilingual v2 and Eleven v3 for responsiveness, which is why it dominates the voice-agent slot in ElevenLabs integrations (Vapi, LiveKit, and countless custom stacks). It supports the full ElevenLabs voice surface: thousands of community and professional voices, instant and professional voice cloning, voice settings (stability, similarity, style, speed 0.25–4.0), and language_code enforcement for pronunciation. Access is through the standard ElevenLabs API with official Python/JS SDKs and a CLI, billed on credit-based plans with a monthly free character allowance.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
- Provider-claimed ~75 ms latency refers to model inference only (per ElevenLabs docs); end-to-end varies by region/endpoint
- No independent benchmarks found
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 8/10
Scored 8/10 (TIER metrics, metrics-v1). Evidence: ElevenLabs' production model lineup with public skills repo and docs; Flash v2.5 is the documented real-time tier used across the voice-agent ecosystem. Strengths: 32 languages, strong voice-cloning surface (instant + professional), mature SDKs and streaming, huge voice library. Docked for: (1) closed model — the 75ms claim is model-inference-only per ElevenLabs' own docs, with real round-trips materially higher; (2) quality deliberately trails Multilingual v2/v3 for speed; (3) launch date approximate — provider never published a precise release date for v2.5. License: proprietary.
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 9.0/10
- Maintenance · recency, releases, issue load
- 9.0/10
- Openness · license + docs
- 2.0/10
- Manual review · sanity read + red-flag check
- 8.0/10
- · eleven_flash_v2_5: 32 languages, provider-claimed ~75ms latency — model-inference only per ElevenLabs' own docs
- · Full ElevenLabs voice surface: instant + professional cloning, voice settings, language_code enforcement
- · Mature Python/JS SDKs + CLI; credit-based plans with monthly free character allowance
- · Release date approximate — provider never published a precise v2.5 launch date