Private by default, End-to-end encrypted, Verified enclave, Unlinkable payments
Joined October 2026
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Thinkr has now bought back and burned 7,182,607 $THKR for expired holder vouchers, or 0.72% of the supply.
That took three burns since 28 Oct, worth $251.70 in total. Today's burn alone took 1,649,139 THKR.
Check each transaction at thinkr.sh/holders
The first buyback burned 4,663,203 THKR on 28 Oct: robin.etherscan.io/tx/0x33a6…
The second burned 870,265 THKR on 30 Oct: robin.etherscan.io/tx/0x2e61…
The third burned 1,649,139 THKR today: robin.etherscan.io/tx/0x9fdd…
Our last recap said Zcash top-ups and a public SDK come next. Both shipped within a day, and holders of 1M $THKR got free chats in Private mode as well.
In the app:
- A wallet that holds 1M $THKR for 24 hours gets up to 100 free chats a day on DeepSeek V4.1 Flash, GPT-OSS 120B, and Gemma 4 31B. Prove it once in Settings, on the Vouchers page, by burning 100 THKR. Your browser then takes blind passes, so a spent pass does not show which wallet took it.
- Zcash top-ups opened in Settings, and USDG followed the same way. Send any amount to the address made for your top-up, and it joins your balance to the cent. For USDG, any wallet on Robinhood Chain works, and you connect no wallet and sign nothing.
For developers:
- The Thinkr API refuses any chat that your machine did not encrypt first.
- An API key holds its own credit, moved from your balance in the app.
- The SDK is public on npm and GitHub, with a Postman collection that runs one chat in three requests.
- The blind passes and the new claim contract are public in the proxy, issuer, and contracts repos.
On chain:
- The burn address holds 72,476,863 $THKR, or 7.25% of the supply.
- Holder vouchers earned so far are worth $758.17 of credit, across 226 wallets since launch.
- A claim of holder vouchers now burns 100 THKR, down from 1,000, through a new contract verified on Sourcify.
Without encryption, your chat never gets processed on the Thinkr API.
Your machine verifies the enclave and encrypts the chat first.
The API receives nothing but ciphertext, and the enclave holds the one key that opens it.
The answer comes back encrypted, and your machine decrypts it.
This video runs one chat from start to finish in Postman.
Install the SDK from npm: npmjs.com/package/@thinkr/sd…
Read its code and get the Postman collection on GitHub: github.com/thinkrsh/thinkr-s…
The Thinkr API is running, and only encrypted chats get through.
We tested it in Postman: 6 models of Private mode with their prices, the credit on a key, and the remote attestation of the enclave all answered. Every server between you and the model sees ciphertext.
API keys are ready in the app, each with a limit in dollars from your balance. The SDK that encrypts your chats is coming next.
NVIDIA, Google Cloud, Cohere, and Brave all moved more AI into enclaves in October.
Thinkr's Private mode already runs that way: a TEE, remote attestation, and encryption from your browser to the enclave.
thinkr.sh/blog/ai-privacy-ne…
Since yesterday, Thinkr has added calls, passkey accounts, and a second buyback burn.
In the app:
- Calls opened in Private mode. Pick a voice and talk, and your speech reaches an enclave encrypted.
- Accounts now run on a passkey. Sign in on a new device, and the chats and credit come back.
- Your account and your balance moved to the foot of the sidebar.
- Holder vouchers can now be claimed under Vouchers in Settings, with a pasted wallet and 1,000 THKR to burn.
On chain:
- A second buyback burn removed 870,265 $THKR from supply and took the burn address to 71,472,578 THKR, or 7.15% of the supply.
- Wallets holding $THKR have earned $726.11 of Thinkr credit so far, up $84.97 from our last recap.
On thinkr.sh:
- The Holders page now shows its totals in dollars and the holder pool wallet, with 516.99 USDG in it: thinkr.sh/holders
- Every explorer link on the site opens Etherscan.
In the code:
- The public issuer repo gained the code for top-ups in Monero and Zcash.
Next:
- Top-ups in Monero and Zcash go live in the app.
- The SDK of the Inference API goes public, so holder vouchers can pay for API calls from your own code.
- Buyback burns continue as expired holder vouchers fund them.
Private mode on Thinkr now takes calls.
What happens to your voice:
1. The enclave proves what it runs with remote attestation, and your browser verifies that proof before the call opens.
2. Your browser encrypts each turn with HPKE (RFC 9180).
3. In trusted execution environments (TEEs), Voxtral Small 24B hears you and GPT-OSS 120B answers.
4. The recording is dropped once it becomes text.
The chat of the call stays on your device.
You can now claim $THKR holder vouchers right inside the Thinkr app, without connecting your wallet.
Paste the address that holds your THKR, then send 1,000 THKR from that wallet to the address the app shows.
The contract burns it and sends anything above 1,000 back. You can check the claim contract here: robin.etherscan.io/address/0…
Accounts now open with a passkey too, so your chats, credit, and claims follow you to every device.
The Thinkr issuer signs every note of credit without ever seeing it.
Before it signs, your browser puts a blind on the note, with RSA blind signatures from RFC 9474 (SHA-384, PSS).
Once the blind comes off, the proxy verifies the signature and accepts the note once. Nothing in it leads to the wallet that paid.
Thinkr credit earned by $THKR holders now totals $641.14, in 1,603 holder vouchers.
Since launch, 206 wallets have earned them. Today's pool of holder credit is $105.69, up from $78.42 yesterday.
On chain:
- The first buyback burn took 4.66M THKR out of supply, worth the $184.54 of holder vouchers that wallets left unclaimed when they sold.
- Each expired holder voucher now funds a buyback burn. A voucher expires when it stays unclaimed for 14 days, or when its wallet stays under 100K THKR for 24 hours.
- The burn address now holds 69,789,356 THKR, 6.98% of all THKR, up 5,284,705 since our last recap.
In the app:
- Think now sits next to + in the message box. Turn it off when you want the answer right away.
- Web search now runs in chats on ZDR and Open, up to 3 searches an answer at $0.00875 each.
On the site:
- The Holders page lists every earning wallet, the THKR counted for it, and each buyback burn with its transaction: thinkr.sh/holders