Software · head to head
AI21 Labs vs Wordtune
The short version
- Each has a real cost: AI21 Labs the free allowance is $10 of credit lasting 7 days rather than an ongoing free tier; Wordtune the free Basic plan is limited to 10 rewrites and AI suggestions per day
- They diverge on capability: AI21 Labs covers Jamba models, Wordtune covers Rewriting.
Where they differ
Only the attributes on which AI21 Labs and Wordtune actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown), founded (2017).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in AI21 Labs
- Jamba models
- Long context
- RAG engine
- Writing tools
- REST API
- Amazon Bedrock
- Cloud platforms
- Api support
Only in Wordtune
- Rewriting
- Tone adjustment
- Sentence expansion
- Summarization
- Browser extension
- Microsoft Word
- Google Docs
- Web support
What people use each for
The jobs each tool is most often brought in to do.
AI21 Labs
- Running long-context tasks on the Jamba model familynot Wordtune
- Building and optimising production AI agents with Maestronot Wordtune
- Routing between models to control cost and accuracynot Wordtune
- Long-horizon agentic tasks needing stateful workspacesnot Wordtune
Wordtune
- Rewriting and paraphrasing emails, articles and messagesnot AI21 Labs
- Summarizing long text or video into shorter formnot AI21 Labs
- Grammar and spelling correction inside a browser extensionnot AI21 Labs
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
AI21 Labs
- The free allowance is $10 of credit lasting 7 days rather than an ongoing free tier
- Jamba Large is $2 per million input tokens and $8 per million output, so output-heavy work costs four times as much as input
- Volume discounts, private cloud hosting and higher rate limits require a custom plan
- Standard rate limits are not published
Wordtune
- The free Basic plan is limited to 10 rewrites and AI suggestions per day
- The free Basic plan is limited to 3 AI summarizations per month
- The Advanced plan caps usage at 30 rewrites per day and 15 AI summarizations per month
- SAML SSO, centralized billing and business support are excluded from all three self-serve plans (Basic, Advanced and Unlimited)
- The advertised $4.89 and $6.99 per month rates are billed annually; paying monthly costs $6.99 and $9.99
- Wordtune does not offer refunds, only cancellation before the next billing cycle
- The free trial lasts 3 days and requires payment information before it starts
Pricing, plan by plan
AI21 Labs
Free- Free TrialFree
- Limited usage
- API access
- Jamba$0.2/per-million-input-tokens
- 256K context
- Hybrid architecture
Wordtune
Free- FreeFree
- 10 rewrites/day
- Basic features
- Plus$9.99/month
- Unlimited rewrites
- All features
- Unlimited$14.99/month
- Unlimited everything
- Priority support
Which should you pick?
Choose AI21 Labs if
- You need jamba models.
- You want to start without paying.
- You work on Api, Cloud.
- You also want long context.
Choose Wordtune if
- You need rewriting.
- You want to start without paying.
- You work on Web, Browser-extension.
- You also want tone adjustment.
Questions people ask
- Is AI21 Labs or Wordtune better?
- Neither clearly leads. AI21 Labs starts at Free and Wordtune at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, AI21 Labs or Wordtune?
- AI21 Labs starts at Free and Wordtune at Free.
- Does AI21 Labs or Wordtune run on more platforms?
- AI21 Labs runs on Api, Cloud. Wordtune runs on Web, Browser-extension.
- Can I use AI21 Labs for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is AI21 Labs best used for?
- AI21 Labs is most often used for running long-context tasks on the jamba model family, building and optimising production ai agents with maestro, routing between models to control cost and accuracy, long-horizon agentic tasks needing stateful workspaces. Of those, running long-context tasks on the jamba model family and building and optimising production ai agents with maestro are not what Wordtune is typically brought in for.
- What can AI21 Labs do that Wordtune cannot?
- AI21 Labs covers Jamba models, Long context, RAG engine, Writing tools. Wordtune covers Rewriting, Tone adjustment, Sentence expansion, Summarization.
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