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AI · head to head

AI21 Labs vs Captions

AI21 Labs logo

AI21 Labs

AI

Enterprise language AI solutions

From
Free
Rated
-
Full reviewWebsite
Captions logo

Captions

Video Production

AI video editor that automates post-production at scale

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; Captions credit rollover limited to 3x monthly maximum, forcing spending within quarters
  • They diverge on capability: AI21 Labs covers Jamba models, Captions covers AI Edit.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where AI21 Labs and Captions differ
AttributeAI21 LabsCaptions
Pricing modelusage-basedUnknown
PlatformsApi, CloudWeb, iOS, Android
CategoryAIVideo Production
Founded2017Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 Captions

  • AI Edit
  • Auto-Captions
  • AI Avatars
  • Eye Contact Correction
  • Background Noise Removal
  • Pause Trimming
  • Text-to-Edit
  • Royalty-Free Music

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 Captions
  • Building and optimising production AI agents with Maestronot Captions
  • Routing between models to control cost and accuracynot Captions
  • Long-horizon agentic tasks needing stateful workspacesnot Captions

Captions

  • Rapid video production for social media content at scalenot AI21 Labs
  • Converting long-form recordings into short-form clipsnot AI21 Labs
  • Adding captions and translations for global audience reachnot AI21 Labs
  • Cleaning up podcast and interview audio automaticallynot AI21 Labs
  • Building library of branded videos with consistent stylingnot 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

Captions

  • Credit rollover limited to 3x monthly maximum, forcing spending within quarters
  • Free plan provides limited editing capability, requiring immediate paid upgrade
  • Minimum 3-day refund window and 10-20 percent credit usage threshold restricts refunds
  • Per-credit pricing model increases costs for high-volume video production
  • Enterprise plan requires custom negotiation with no transparent pricing

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

Captions

Free
  • FreeFree
    • Basic editing tools
    • Trim functionality
    • Transitions
  • Max$24.99/month
    • 500 AI credits per month
    • AI Edit styles
    • Digital twins and custom AI actors
  • Scale 1x$69.99/month
    • 1,400 AI credits per month
    • Everything in Max
    • Sophisticated generative AI model access
  • Scale 2x$139.99/month
    • 2,800 AI credits per month
    • Everything in Max
    • Sophisticated generative AI model access

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 Captions if

  • You need ai edit.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want auto-captions.
Captions review

Questions people ask

Is AI21 Labs or Captions better?
Neither clearly leads. AI21 Labs starts at Free and Captions at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, AI21 Labs or Captions?
AI21 Labs starts at Free and Captions at Free.
Does AI21 Labs or Captions run on more platforms?
AI21 Labs runs on Api, Cloud. Captions runs on Web, iOS, Android.
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 Captions is typically brought in for.
What can AI21 Labs do that Captions cannot?
AI21 Labs covers Jamba models, Long context, RAG engine, Writing tools. Captions covers AI Edit, Auto-Captions, AI Avatars, Eye Contact Correction.

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
Captions: What is the price of the Max plan?

The Max plan costs $24.99 per month and includes 500 AI credits per month, AI Edit styles, digital twins, chat-based editor, and custom B-roll.

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
Captions: How many languages are supported for captions?

Captions supports 100+ languages for auto-caption generation with 100+ caption style options.

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
Captions: Can I use Captions on mobile devices?

Yes, Captions is available on iOS App Store and Google Play for mobile editing, along with the web-based editor.

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
Captions: What does the Scale pricing tier include?

Scale plans offer 1,400, 2,800, or 5,600 AI credits per month at $69.99, $139.99, and $279.99 respectively, with everything in Max plus access to sophisticated generative AI models.

Source
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