How to choose an AI for your small business.

Emails, proposals and reports: what to check before you pay, and how not to confuse API charges with subscriptions.

Facts below come from the datasets on this site, last updated 29 Oct 2026, 14:36 UTC. Interpretation is labelled as ours. We have not tested these products hands-on.

What the evidence shows

• For business emails and everyday work, our rules currently surface: Gemini 4 Argon, Claude Opus 5, Claude Opus 5.5, Kimi K3. The ranking uses Arena votes on business and management prompts, with instruction-following and overall votes as support.
• These tests do not cover your documents, your industry's wording, spreadsheets, or what happens to your data. They do not measure privacy terms.
• No verified subscription prices are available to us. API prices are charged per use by developers and are not the price of a monthly subscription.

Our interpretation

For routine writing, the useful question is whether a cheaper option is good enough, which only a trial on your own work can settle. We suggest comparing two candidates on the same three real tasks.

What to do next

1. Run the business and everyday work result.
2. Read each maker's pricing page and terms yourself, including how your content is used.
3. Test your top two on a real email, a summary and a proposal, then decide.