Can I use Claude without an account?
Yes. Claude Opus 5.5, Claude Sonnet 5.5, Claude Haiku 5.5, Claude Opus 5, Claude Sonnet 5, and Claude Haiku 4.5 run with zero data retention, and the free trial opens them with no account.
With zero data retention, the provider reads your chat to answer it and promises by contract to keep nothing. Thinkr's proxy writes none of it to disk.
Claude Fable 5.1 and Claude Fable 5 take credit.
| Model | Mode | Price |
|---|---|---|
| Claude Opus 5.5 | ZDR | $3.00 in / $15.00 out per 1M tokens |
| Claude Sonnet 5.5 | ZDR | $2.50 in / $12.50 out per 1M tokens |
| Claude Haiku 5.5 | ZDR | $0.07 in / $0.37 out per 1M tokens |
| Claude Opus 5 | ZDR | $3.75 in / $18.75 out per 1M tokens |
| Claude Sonnet 5 | ZDR | $1.50 in / $7.50 out per 1M tokens |
| Claude Haiku 4.5 | ZDR | $1.25 in / $6.25 out per 1M tokens |
| Claude Fable 5.1 | Open | $7.50 in / $37.50 out per 1M tokens |
| Claude Fable 5 | Open | $7.50 in / $37.50 out per 1M tokens |
More questions.
- Is DeepSeek private on Thinkr?In Private mode, yes. DeepSeek V4.1 Flash runs inside an enclave that your browser verifies, so neither Thinkr nor DeepSeek can read the chat.Read the answer
- Which AI models run in a TEE?Private mode runs six open-weight models inside a trusted execution environment (TEE) that your browser verifies before each chat: GPT-OSS 120B, DeepSeek V4.1 Flash, Kimi K3, GLM-5.3, Gemma 4 31B, and Llama 3.3 70B.Read the answer
- What is zero data retention (ZDR)?Zero data retention (ZDR) is a promise of a provider to keep no prompts and no answers. The provider reads your chat to answer it, then keeps nothing, by contract.Read the answer