Cheapest AI Tools Right Now: $0, $8, $9, $20 and Pay-Per-Token
Start with the cheapest useful tier for your work: ChatGPT Free, Claude Free and Gemini Free cost $0, ChatGPT Go is $8/month, and the standard plans are $20. For programmatic use, budget APIs can be cheaper still: DeepSeek V4 Flash is $0.05/$0.16 per 1M tokens, GPT-5.4 nano is $0.20/$1.25, Gemini 3.5 Flash Lite is $0.30/$2.50 and Claude Haiku 4.5 is $1/$5. Casual users should stay free; daily chat users should buy one plan; builders should meter tokens and compare the API break-even before subscribing.
Plans and Pricing
Free Tier — ChatGPT, Claude, Gemini
$0/monthAll three major providers offer capable free tiers on current models. ChatGPT Free gives capped access to OpenAI's current lineup. Claude Free provides Claude Sonnet 5 with daily limits. Gemini Free runs in the Gemini app with usage caps. Start here before paying for anything.
Best for
Casual users, students and anyone testing AI before committing. If you use AI fewer than five times a day, one free tier covers it.
Not for
Daily professional use; caps will interrupt you. Also not for AI inside Gmail and Docs, which needs Google AI Pro.
Cursor Free / GitHub Copilot Free
$0/monthBoth coding tools have real free tiers with monthly completion and chat caps. Cursor Free trials the AI editor; GitHub Copilot Free works inside VS Code and JetBrains. The best free AI for developers.
Best for
Developers who want AI coding help without a subscription. Enough for hobbyist and part-time development.
Not for
Professional developers coding all week; the free allowances run out mid-month.
DeepSeek V4 Flash (API)
$0.05 / 1M input, $0.16 / 1M output (typically $1–5/month)Frontier-class quality at the lowest list price in the catalogue. DeepSeek V4 Pro ($0.66 / $1.98) covers harder reasoning and coding. Requires an API key or a third-party interface; the DeepSeek web chat is free.
Best for
Developers and technical users who want near-flagship quality at a small fraction of GPT-5.5 or Claude Sonnet 5 prices. Ideal for RAG, classification and high-volume pipelines.
Not for
Non-technical users who need a ready-made interface, or teams with data-residency rules that exclude China-hosted APIs.
Groq (Llama via API)
Under $2/month typicalVery fast inference on open models such as Llama 4 Scout and Llama 4 Maverick. Groq's hardware makes it the fastest option for real-time products; see the vendor page for current per-token rates.
Best for
Speed-critical applications, real-time AI products and developers who need fast inference at low cost.
Not for
Tasks needing frontier reasoning; Llama 4 trails GPT-5.5 and Claude Opus 5 on the hardest problems.
Rytr
$9/monthThe cheapest dedicated AI writing tool with a real interface. Rytr at $9/month covers short-form content: social posts, product descriptions, ad copy and subject lines. Verify current limits at rytr.me.
Best for
Budget content creators who want a writing interface for short-form work under a monthly character cap.
Not for
Long-form blog writers or anyone needing high-volume generation; the cap bites quickly.
Writesonic
$20/monthBest-value dedicated AI writing tool. Writesonic at $20/month covers articles, ad copy, email sequences and social copy on current frontier models, at well under half of Jasper Creator's $49. Verify current pricing at writesonic.com.
Best for
Freelancers, solopreneurs and small content teams who want a full writing interface without the Jasper premium.
Not for
Marketing teams that need enforced brand voice across many writers; Jasper's brand-voice tooling is stronger for that.
ChatGPT Plus / Claude Pro / Google AI Pro
$20/month each ($19.99 for Google AI Pro)The three frontier subscriptions: ChatGPT Plus (GPT-5.5 and GPT-5.4), Claude Pro (Claude Sonnet 5 and Opus 5) and Google AI Pro (Gemini 3.1 Pro plus Workspace integration). ChatGPT Go at $8 is the budget step below Plus. General-purpose assistants rather than writing tools, but the output quality usually exceeds dedicated tools because they run the newest models.
Best for
Daily users who need AI for writing plus research, coding or analysis. Claude Pro stands out for prose; Google AI Pro for Gmail and Docs users.
Not for
Users who only need writing templates (use Writesonic or Rytr) or developers (the API is cheaper).
Subscription prices and API rates verified against the models.json catalogue on 11 September 2026. Groq and Rytr limits change; verify on the vendor page before buying.
What is the cheapest AI tool that is still useful?
For occasional use, the free tiers of ChatGPT, Claude and Gemini at $0. For daily chat on a budget, ChatGPT Go at $8. For API users, DeepSeek V4 Flash at $0.05/$0.16 per 1M tokens is the lowest list price among frontier-class models, with GPT-5.4 nano ($0.20/$1.25) and Gemini 3.5 Flash Lite ($0.30/$2.50) close behind if you need OpenAI or Google hosting. The $20 subscriptions are worth it only if you use AI daily and hit free-tier limits; $20 on the API buys roughly 5M input plus 1M output tokens of Claude Sonnet 5, or several hundred million tokens of DeepSeek V4 Flash. Price your own usage in the calculator.
Frequently Asked Questions
What is the cheapest AI subscription available?
ChatGPT Go at $8/month is the cheapest frontier chat plan, and Rytr at $9/month is the cheapest dedicated writing tool. The standard tier is $20: ChatGPT Plus, Claude Pro, Perplexity Pro, Cursor Pro and Writesonic, with Google AI Pro at $19.99. The free tiers of ChatGPT, Claude and Gemini cover casual use at $0.
Can I use a powerful AI for under $5/month?
Yes, via API. DeepSeek V4 Flash at $0.05/$0.16 per 1M tokens runs a moderate workload for $1–5 a month; GPT-5.4 nano ($0.20/$1.25), Gemini 3.5 Flash Lite ($0.30/$2.50) and Claude Haiku 4.5 ($1/$5) are the equivalents from the big three. All need an API key or a client app.
Is free AI good enough for professional work?
Often, yes. If you use AI fewer than five to ten times a day, free tiers on current models are sufficient. Paid tiers mainly buy higher limits, priority and extra features, not a different class of model.
What is the cheapest dedicated AI writing tool?
Rytr at $9/month is the cheapest paid writing tool; Writesonic at $20/month is the best-value option for volume. Both sit on the same frontier models as Jasper, which charges $49/month for Creator.
Is Writesonic cheaper than Jasper?
Yes. Writesonic is $20/month against Jasper Creator at $49/month. The difference pays for Jasper's brand-voice templates and team features, not better model output.
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