Guide
Dessa AI FAQs: 15 Questions About Block's Voice Model, Answered
Search for Dessa AI and you will find the same fifteen questions asked again and again — about price, release dates, downloads, languages and safety. This page answers all of them in one place, using only facts verified against Block's official Dessa page and reputable October 2026 reporting. Where Block has not announced something, the answer says so plainly. That honesty is the point: a model this hyped attracts invented dates and fake access offers, and a straight “not announced” is more useful than a confident guess.
The fifteen questions
1. What is Dessa AI?
Dessa is Block's full-duplex, speech-to-speech voice model, announced October 23, 2026. Block says it was trained from scratch on human conversation audio only, with no text and no pretrained models, so it hears and produces emotion, timing and tone directly in sound.
2. Who built Dessa AI?
A small research lab inside Block, the company led by Jack Dorsey and parent of Square, Cash App, Bitkey and Proto. The lab was founded by former members of the Toronto startup Dessa, is led by Ragavan Thurairatnam, names six researchers and three interns on Block's page, and reports directly to Dorsey.
3. When was Dessa AI announced?
October 23, 2026, as a research preview with live demo recordings published on Block's official page at block.xyz/dessa.
4. Can I use Dessa AI today?
Almost certainly not. Dessa is not a public product. Early access goes first to a small group of AI safety researchers, and everyone else can join the public waitlist. There is no app, no public demo you can talk to and no download.
5. How do I join the Dessa AI waitlist?
Go to Block's official page, block.xyz/dessa, and use the sign-up there. It is free. That page is the only official place; anything else using Dessa's name to sell access is not Block. Our step-by-step waitlist guide covers the process and the fakes to avoid.
6. How much does Dessa AI cost?
Block has announced no pricing at all. There is no paid tier, no per-minute rate and no reseller program. If someone charges you for Dessa access, they are not selling you Dessa.
7. When is the Dessa AI release date?
Not announced. Block has given no public release date, and wider access will presumably depend on what the first safety testing finds.
8. Is there a Dessa AI API for developers?
Not announced. There is no documentation, no API key and no developer pricing. Developers who need realtime voice today have to use a rival that is actually available, while Dessa remains a preview.
9. Can I download Dessa AI or its weights?
No. Block has released no weights, model files or software download. Claims of a Dessa download, including on model hubs, are not from Block.
10. What computer can run Dessa AI?
Block says inference runs faster than real time locally on a MacBook Pro with an M4 Max chip or better. Block has announced no phone support and no other hardware list. That is a demonstrated capability, not a product you can install.
11. Was Dessa AI trained on text?
No, according to Block. It was trained from scratch on human conversation audio only, with no text and no pretrained models. Block says it learned language from hundreds of times fewer words than text large language models need, and was trained on a single NVIDIA GB200 NVL72 system.
12. What can Dessa AI do in conversation?
In Block's live, unsteered demo recordings, Dessa laughs mid-sentence, backchannels with “yeah” and “got it”, hears and produces sarcasm, sighs and emotion, finishes a speaker's sentence, adjusts its volume when asked, and holds a conversation with OpenAI's GPT-Live-1, with Block noting OpenAI is unaffiliated and has not endorsed Dessa. Reviewers found the demos mostly natural, with occasional awkwardness, including Dessa calling a speaker “Ronaldo”.
13. What languages does Dessa AI speak?
Block has not announced a language list. Because it learned from human conversation audio, language support is a natural question, but no verified list exists and this site will not invent one.
14. Is Dessa AI safe?
Block is treating safety as the gating question: safety researchers get access first to probe risks such as impersonation, deception and emotional manipulation. Block has published no safety evaluation results yet. We covered the risks and the fake-access scams in is Dessa AI safe?
15. How is Dessa different from ChatGPT Voice or Moshi?
Against ChatGPT Voice, Dessa removes text entirely, while ChatGPT is available today and backed by a text-trained model with far broader documented knowledge and tools — see Dessa vs ChatGPT Voice. Against Moshi, Dessa is speech-only and closed for now, while Moshi is built on a text model and released with open weights — see Dessa vs Moshi.
The one-page summary
Dessa is a research preview, not a product. It was announced on October 23, 2026 by a small Block lab reporting to Jack Dorsey. It is full-duplex and speech-only, trained on human conversation with no text, trained on a single NVIDIA GB200 NVL72, and capable — by Block's account — of running faster than real time on a MacBook Pro with an M4 Max chip or better. Safety researchers go first, the waitlist at block.xyz/dessa is free and open, and pricing, an API, weights, benchmarks, a parameter count and a release date have not been announced. Everything else you may have read with a date or a price attached should be treated as unverified until Block itself says it.
We update this page and our Dessa AI explainer whenever Block announces something that changes an answer. If you spot a claim elsewhere that contradicts this page, check whether it cites Block — and if it promises paid early access, a download or a token, it is not Block.
Sources: Block's official Dessa page (block.xyz/dessa); The Verge, TechCrunch and other October 2026 coverage summarised in DessaAI Daily's verified-facts record. News check on October 30, 2026 found no new official Block announcement changing any answer above.
Frequently asked questions
What is Dessa AI?
Dessa is Block's full-duplex, speech-to-speech voice model, announced October 23, 2026 and trained from scratch on human conversation audio only, with no text and no pretrained models.
How much does Dessa AI cost and when is it released?
Block has announced no pricing and no public release date. Dessa is a research preview; early access goes first to AI safety researchers and the waitlist at block.xyz/dessa is free.
Is there a Dessa AI API or download?
No. Block has announced no API and released no weights, download or app. Anything offering those today is not from Block.
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