AI21 Labs tech stack
AI21 Labs builds mostly with Python. Its stack also includes vLLM, Kubernetes, DeepSpeed, FSDP. LLM is named in 4 of the 4 job postings AI21 Labs published in the last 12 months (100%). Counted by Alion from the job postings of AI21 Labs, updated Nov 13, 2026.
What programming languages does AI21 Labs use?
Python is named in 50% of job postings at AI21 Labs.
Python
2 50%
What frameworks and libraries does AI21 Labs use?
DeepSpeed is named in 50% of job postings at AI21 Labs, followed by FSDP (50%), JAX (50%), Megatron-LM (50%).
DeepSpeed
2 50%
JAX
2 50%
PyTorch
2 50%
SGLang
2 50%
TRL
2 50%
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What cloud and platforms does AI21 Labs use?
vLLM is named in 50% of job postings at AI21 Labs, followed by Kubernetes (50%).
vLLM
2 50%
Kubernetes
2 50%
What developer tools does AI21 Labs use?
SLURM is named in 50% of job postings at AI21 Labs, followed by TensorRT (50%).
What AI and ML technologies does AI21 Labs use?
LLM is named in 100% of job postings at AI21 Labs.
LLM
4 100%
Which engineering practices does AI21 Labs ask for?
Post-training is named in 75% of job postings at AI21 Labs, followed by AI Agents (75%), DPO (50%), GRPO (50%).
AI Agents
3 75%
Knowledge Distillation
2 50%
Mixture of Experts
2 50%
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How does your stack fit AI21 Labs?
How modern is the AI21 Labs stack?
AI21 Labs scores 66 out of 100 (Modern). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 1; legacy ones: 0.
How common is the AI21 Labs stack in its industry?
Share of the 527 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like AI21 Labs
Questions about the AI21 Labs tech stack
What programming languages does AI21 Labs use?
The languages named in AI21 Labs job postings are Python (50%), as a share of the 4 postings of the last 12 months.
Does AI21 Labs use DeepSpeed?
Yes. DeepSpeed is named in 2 of 4 job postings (50%) and required in 2 of them.
What cloud and platforms does AI21 Labs use?
The cloud and platforms named in AI21 Labs job postings are vLLM (2), Kubernetes (2) (postings in brackets).
Is the AI21 Labs tech stack changing?
No new technology has appeared in AI21 Labs job postings in the last six months.
How modern is the AI21 Labs tech stack?
AI21 Labs scores 66 out of 100 (Modern). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 1; legacy ones: 0.
How does Alion know the AI21 Labs tech stack?
Alion reads every job posting AI21 Labs publishes and tags the technologies each one names. The figures on this page count the 4 postings of the last 12 months and were updated on Nov 13, 2026.
Method and citation
Alion reads every job posting the company publishes and tags the technologies each one names. Shares count the postings of the last 12 months, open and closed; the company's own products are counted apart. How we count
Alion, "AI21 Labs tech stack: 28 technologies from 4 job postings", as of Nov 13, 2026. https://alion.io/company/ai21-labs/technologies