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AI · head to head

AI21 Labs vs Wordtune

AI21 Labs logo

AI21 Labs

AI

Enterprise language AI solutions

From
Free
Rated
-
Full reviewWebsite
Wordtune logo

Wordtune

AI

AI writing companion for better text

From
Free
Rated
-
Full reviewWebsite

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.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which AI21 Labs and Wordtune actually diverge.

Attributes where AI21 Labs and Wordtune differ
AttributeAI21 LabsWordtune
Pricing modelusage-basedfreemium
PlatformsApi, CloudWeb, Browser-extension

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (AI), 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
    • 10 USD credits
    • 7-day trial period
    • No credit card required
  • Pay As You Go$undefined/mo
    • Usage-based pricing model
    • Access to all Foundation model APIs and SDK
    • Unlimited seats
  • Custom Plan$undefined/mo
    • Volume discounts on token pricing
    • Premium API rate limits
    • Private cloud hosting option

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.
AI21 Labs review

Choose Wordtune if

  • You need rewriting.
  • You want to start without paying.
  • You work on Web, Browser-extension.
  • You also want tone adjustment.
Wordtune review

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.

Answered from the vendors’ own pages

AI21 Labs: How much do AI21's Jamba Mini and Jamba Large models cost?

Jamba Mini costs $0.2 per 1M input tokens and $0.4 per 1M output tokens. Jamba Large is priced at $2 per 1M input tokens and $8 per 1M output tokens. Both models use usage-based billing with no monthly minimums.

Source
Wordtune: How long is the free trial and when am I charged?

The free trial lasts 3 days from purchase. You must provide payment information upfront but won't be charged until the trial ends. You can cancel anytime before the trial ends without charges.

Source
AI21 Labs: Does AI21 offer a free trial?

Yes, AI21 provides a free trial with 10 USD in credits for 7 days, no credit card required. The trial grants access to all Foundation models via API and SDK.

Source
Wordtune: Do you offer refunds?

No refunds are offered, but you can cancel your subscription before the next billing cycle or before your trial ends.

Source
AI21 Labs: How do AI21's custom plans and volume discounts work?

Custom plans with volume discounts are available for enterprises but require contacting sales. These plans can include premium API rate limits, private cloud hosting, priority support, dedicated account managers, and expert consultancy.

Source
Wordtune: What payment methods do you accept?

Wordtune accepts all major credit cards, debit cards, Apple Pay, Google Pay, and PayPal.

Source
AI21 Labs: What does AI21 mean by 30% token efficiency savings?

AI21 claims their tokenization delivers approximately 30% more text per token compared to other providers, which can reduce effective costs by roughly 30%. This applies primarily to English-language text averaging 1 word or 6 characters per token.

Source
Wordtune: Are there discounts for students or nonprofits?

Yes, students and educators with valid .edu emails, and nonprofit employees qualify for a 30% discount on both annual and monthly plans.

Source
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