Lowest useful planFree
Free tierYes — genuinely usable
Value score85/100
CategoryResearch & Chat
Best forMath and logic for $0
( RESEARCH & CHAT — VALUE SCORE 85/100 )
Free frontier reasoning model — best for math and logic for $0. Unsponsored facts: what it costs, whether the free tier is enough, and what to pick instead.
( FAQ )
Yes — DeepSeek is free to use. Its free tier is genuinely usable for real work, not a demo.
DeepSeek is free. Many free tools add paid plans later — verify current pricing on the official site before committing.
DeepSeek is best for math and logic for $0. Free frontier reasoning model. It scores 85/100 on our value-per-dollar scale, which weighs capability against what you actually pay.
SOME LINKS MAY BE AFFILIATE LINKS — THEY NEVER CHANGE THE RANKING. PRICES APPROXIMATE, VERIFY ON TOOL SITES.