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AI · head to head

AI21 Labs vs Mistral AI

AI21 Labs logo

AI21 Labs

AI

Enterprise language AI solutions

From
Free
Free plan
Yes
Full reviewWebsite
Mistral AI logo

Mistral AI

Machine Learning

European AI lab with open models, API platform and Le Chat assistant

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only AI21 Labs has a free tier, so it costs nothing to try first.
  • Each has a real cost: AI21 Labs the free allowance is $10 of credit lasting 7 days rather than an ongoing free tier; Mistral AI smaller model selection compared to OpenAI; Mistral Medium 3.5 significantly more expensive than competing mid-tier models
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which AI21 Labs and Mistral AI actually diverge.

Attributes where AI21 Labs and Mistral AI differ
AttributeAI21 LabsMistral AI
Starting priceFreeOn request
Free tierYesNo
PlatformsApi, CloudWeb, API, Self-hosted, Cloud (AWS, Google Cloud, Azure, SAP, IBM, Snowflake, NVIDIA, Outscale)
CategoryAIMachine Learning
Founded2017Unknown

Identical on both: pricing model (usage-based), 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 Mistral AI

Nothing recorded that AI21 Labs does not also cover.

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

Mistral AI

  • EU-regulated workloads requiring data residency outside USnot AI21 Labs
  • Custom model training and domain-specific fine-tuningnot AI21 Labs
  • Multi-modal document processing with OCRnot AI21 Labs
  • Autonomous development with Vibe for Codenot 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

Mistral AI

  • Smaller model selection compared to OpenAI; Mistral Medium 3.5 significantly more expensive than competing mid-tier models
  • Batch processing only available at 50% discount, not free tier
  • No free tier; all API access requires payment

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

Mistral AI

On request
  • Mistral Small 4$0.15/per million input tokens
    • Multimodal
    • Multilingual
    • Apache 2.0 license
  • Mistral Small 4 output$0.6/per million output tokens
    • Same model
  • Mistral Large 3$0.5/per million input tokens
    • General-purpose flagship
  • Mistral Large 3 output$1.5/per million output tokens
    • Same model

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 Mistral AI if

  • You work on Web, API, Self-hosted, Cloud (AWS, Google Cloud, Azure, SAP, IBM, Snowflake, NVIDIA, Outscale).
Mistral AI review

Questions people ask

Is AI21 Labs or Mistral AI better?
Neither clearly leads. AI21 Labs starts at Free and Mistral AI at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, AI21 Labs or Mistral AI?
AI21 Labs has a free tier; the other does not. Paid plans start at Free for AI21 Labs and On request for Mistral AI.
Does AI21 Labs or Mistral AI run on more platforms?
AI21 Labs runs on Api, Cloud. Mistral AI runs on Web, API, Self-hosted, Cloud (AWS, Google Cloud, Azure, SAP, IBM, Snowflake, NVIDIA, Outscale).
Can I use AI21 Labs for free?
Yes. AI21 Labs has a free tier, so you can try it without paying. Mistral AI starts at On request.
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 Mistral AI is typically brought in for.
What can AI21 Labs do that Mistral AI cannot?
AI21 Labs covers Jamba models, Long context, RAG engine, Writing tools.

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
Mistral AI: How much does Mistral AI cost?

Mistral AI offers a free plan with 10 USD/month in API credits, Pro at 14.99 USD/month with 30 USD/month in credits, and Team at 24.99 USD per user/month with a 50 USD minimum.

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
Mistral AI: Is there a free plan?

Yes, Mistral AI includes a free plan with 10 USD/month in API credits, Studio access, and 100+ connectors for limited use.

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
Mistral AI: What are the API costs?

API pricing is per million tokens for most models with input and output charged separately; OCR costs per 1,000 pages; speech models charged per minute.

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
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