FireRedTTS
Open foundation TTS built for industry-grade speech generation.
About
FireRedTTS is an open-source LLM-empowered foundation TTS system from Xiaohongshu's FireRedTeam, with pretrained checkpoints and inference code released in September 2024 and a technical report on arXiv (2409.03283). It pairs an acoustic language model with a flow-matching decoder and has since grown into a family spanning dialogue synthesis (FireRedTTS-2) and instruction-guided voice design (FireRedTTS3).
The original release is strongest on Chinese and English; the team's newer versions widen language coverage substantially. Documentation leans heavily on Chinese-language examples, which can slow down English-first integrators.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 7/10
Scored 7/10 (verified tier, metrics-v1). Evidence: Paper (arXiv 2409.03283), official GitHub repo, press coverage of FireRedTTS-2; Quality claims for v2/v3 are team-reported; Manual review: solid open foundation TTS lineage; docs skew Chinese-language. License: Open-sourced with checkpoints and inference code; check the FireRedTeam/FireRedTTS repo for exact license terms.
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 7.0/10
- Maintenance · recency, releases, issue load
- 7.0/10
- Openness · license + docs
- 7.0/10
- Manual review · sanity read + red-flag check
- 7.0/10
- · Paper (arXiv 2409.03283), official GitHub repo, press coverage of FireRedTTS-2
- · Quality claims for v2/v3 are team-reported
- · Manual review: solid open foundation TTS lineage; docs skew Chinese-language