A complete financial model costs a few cents on DeepSeek's rates. That is why the Pro plan's included monthly AI usage across every model, 7.5x what Lite carries, goes a long way here, without the meter Claude and ChatGPT add-ins put on you.
Denominated in DeepSeek V4 API rates and EBITDAI's measured cost per complete model build ($0.06).
| Per 1M tokens | DeepSeek V4-Flash | Claude Sonnet API |
|---|---|---|
| Input | $0.22 - $0.44 | $3.00 |
| Output | $0.66 - $1.32 | $15.00 |
Published API rates as of August 2026; DeepSeek shows off-peak/peak. Roughly 14-23x less per token.
Pro is $15/month, all-in: sign in and start modeling, remaining usage visible in the pane. 7.5x more usage than Lite across every model, and a complete model build on DeepSeek V4.1 Flash costs a few cents of it.
Connecting your own DeepSeek key is included on the Pro plan. Requests on that key go browser-direct to DeepSeek and DeepSeek bills you at its rates, while the plan's included usage stays available whenever you switch back. Key setup guide.
Yes, through EBITDAI. DeepSeek has no first-party Excel add-in; EBITDAI is the only agentic Excel add-in that runs DeepSeek's models, either on an EBITDAI plan or on your own DeepSeek API key, which the Pro plan supports.
Measured on real builds: a complete from-scratch model (for example a 6-year DCF) consumes a few cents of DeepSeek usage. The $15/month Pro plan includes 7.5x more usage than Lite across every model, and a complete build on DeepSeek V4.1 Flash costs a few cents of it.
DeepSeek publishes API rates of $0.22-0.44 per million input tokens and $0.66-1.32 per million output tokens (V4-Flash; the spread is off-peak versus peak hours), versus $3 and $15 for Claude Sonnet's API: 14-23x less per token. EBITDAI passes that economics through instead of reselling expensive lab tokens.
EBITDAI ships with a mechanical eval harness: models must produce error-free, correctly structured workbooks (three-statement builds, debt schedules, working capital, DCFs) before we ship them in a plan. DeepSeek V4 passes the full suite, including building a correct Tesla DCF from a blank workbook.
On a plan's included usage, requests route through EBITDAI's relay to DeepSeek, which processes them in the PRC; the relay stores nothing on paid plans, while free-plan conversations are logged and reviewed to improve the product. With your own DeepSeek key, which the Pro plan supports, your workbook goes directly from your machine to DeepSeek and never touches EBITDAI's servers. Full details on the Security page.
Pro is $15/month. Begin for free today; cancel anytime.
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