Is Simba 3.5 state of the art?Pending benchmarks.Announced Oct 21, 2026; no independent results yet.
Speechify's text-to-speech model that speaks 48 languages under a single model id, with every catalog voice and cloned voices usable in any of them. Available in the Speechify API on every plan, with streaming, WebSocket and word timestamps. No open weights.
The details so far
- Lab
- Speechify
- Announced
- Oct 21, 2026
- API
- Live · simba-3.5
- Open weights
- Closed
- Task
- Text-to-speech, 48 languages in one model (up from 6 in Simba 3.0 Multilingual)
- Voices
- Every voice in the catalog speaks all 48 languages, cloned voices included; a voice keeps the accent of the recording it was made from
- Output
- 24 kHz audio; speech, streaming and WebSocket endpoints with word timing marks; SSML pauses and speaking rate
- Price
- $10 per 1M characters at launch on the Starter plan (list $20), until Nov 21, 2026
- Status
- Speechify's recommended model from Oct 21, 2026; Simba 3.2 (streaming English) and Simba 3.0 remain available
Tags marked unsure are not stated on the lab's own pages.
What would let us call it
Verdicts use only independent boards we already track. Two consecutive snapshots are required before any crown.
- Publicly announced with a source
- Usable by the public (API or weights)
- Listed on an independent board we track
- Enough results for a rank in a category
- Holds across two snapshots (crowns only)
What the lab claims
Self-reported. Shown for context; not used in any verdict.
Lab claim: listeners preferred Simba 3.5 over Simba 3.2 in 63% of blind English comparisons (95% CI 60–67%), and over Simba 3.0 Multilingual in 62% across six locales (95% CI 56–67%).
Lab claim: 1.8× Simba 3.2's speech throughput per serving instance and 72 ms time to first audio at the 95th percentile under production load.
Sources
LABSimba 3.5 launch page (Speechify)speechify.ai/launch/simba-3-5 · Oct 21, 2026LABSimba 3.5 fact sheet (PDF)speechify.ai/reports/simba-3-5-fact-sheet.pdf · Oct 21, 2026LABSpeechifyAI announcement on Xx.com/SpeechifyAI/status/2112892450234589517 · Oct 21, 2026Tracking continues until an independent board lists it.