Model Tracker
SeamlessM4T
SeamlessM4T is an AI model made by Meta. Meta released it on 22 August 2023. It is generally available. It takes text, audio and returns text, audio.
SeamlessM4T is an AI model made by Meta. Meta released it on 22 August 2023. It is generally available. It takes text, audio and returns text, audio. Its weights are open. Its licence is CC BY-NC 4.0.
- Released
- 22 August 2023 — ai.meta.com, read 16 October 2026
- Status
- Generally available — github.com, read 16 October 2026
- Takes
- Text, Audio — huggingface.co, read 16 October 2026
- Returns
- Text, Audio — huggingface.co, read 16 October 2026
- Open weights
- Yes — huggingface.co, read 16 October 2026
- Licence
- CC BY-NC 4.0 — ai.meta.com, read 16 October 2026
- Context window
- Not confirmed: The maker's pages reviewed do not print a context-window value for SeamlessM4T.
- Longest answer
- Not confirmed: The maker's pages reviewed do not print a standard maximum-output token limit for SeamlessM4T.
- Knowledge cutoff
- Not confirmed: The maker's pages reviewed do not state a knowledge-cutoff date for SeamlessM4T.
- API price, input
- Not confirmed: The maker's pages reviewed do not publish a standard API input price for SeamlessM4T.
- API price, output
- Not confirmed: The maker's pages reviewed do not publish a standard API output price for SeamlessM4T.
- Where
- Downloadable weights — ai.meta.com, read 16 October 2026
- Parameters
- Not confirmed: the figure is not printed in its sentence (a sum or a figure the page does not give)
- Model card
- Not confirmed: two readings disagree: https://huggingface.co/facebook/seamless-m4t-large and https://ai.meta.com/research/publications/seamlessm4t-massively-multilingual-multimodal-machine-translation/
Questions
When was SeamlessM4T released?
Meta released SeamlessM4T on 22 August 2023.
Is SeamlessM4T still available?
Yes: it is generally available, as Meta states it.
Are the weights of SeamlessM4T open?
Yes: Meta publishes the weights of SeamlessM4T for download.
What is the licence of SeamlessM4T?
The licence of SeamlessM4T is CC BY-NC 4.0, as Meta names it.
What does SeamlessM4T take and return?
SeamlessM4T takes text, audio and returns text, audio.
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Sources
- Seamless Communication - AI at Meta (read 16 October 2026)
- Bringing the world closer together with a foundational multimodal model for speech translation (read 16 October 2026)
- seamless_communication/docs/m4t/README.md at main (read 16 October 2026)
- facebook/seamless-m4t-large (read 16 October 2026)