This post outlines five proven AWS strategies GenAI startups can use to secure NVIDIA GPU capacity, control costs, and maintain agility. We breakdown each option including pros and cons as well as advising on which strategies are ideal for specific use-cases.

Five Battle‑Tested Strategies for GenAI Startups

GenAI startups face an uphill battle when scaling their models: NVIDIA GPUs are powerful but scarce, and costs can spiral quickly. Whether you’re training foundational models or running high-throughput inference, GPU availability and price sensitivity directly impact your runway and product timelines.

Fortunately, AWS offers multiple strategic paths to secure NVIDIA GPU capacity reliably and affordably. In this post, we’ll unpack five battle-tested strategies that help technical founders and CTOs optimise their GPU spend without sacrificing agility.

 

Strategies Summarised:

#	Strategy	Ideal Use Case	Typical Savings	Commitment
1	On-Demand Instances	Immediate availability, unpredictable needs	None (highest flexibility)	None
2	Spot Instances	Fault-tolerant training, batch workloads	Up to 90%	None
3	Savings Plans/Reserved Instances	Steady-state inference, long-term use	Up to 45%	1-3 years
4	EC2 Capacity Blocks	Intensive, short-term training sprints	Predictable locked-in rates	1-182 days
5	SageMaker Training Plans & HyperPod	Managed clusters, hands-off training	All-inclusive fees, up to 40% faster epochs	Flexible durations

 

Strategy 1: On‑Demand Instances

What it is

The default pay‑as‑you‑go option: spin up a GPU‑backed EC2 instance in minutes, pay per second, shut it down whenever you’re done.

When to choose it

• Proof‑of‑concept immediate experiments where startup speed trumps cost
• Ad‑hoc debugging sessions that require interactive access
• Early‑stage teams validating model architectures before scaling

Pros & Cons

• Pros
  • Instant availability (if capacity exists)
  • Zero long‑term commitment
• Cons
  • Highest unit cost
  • Popular GPU types (H100, P6‑B200) may be out of stock in hot regions

 

Strategy 2: EC2 Spot Instances

What it is

EC2 Spot instances are spare EC2 capacity sold at up to 90 % discount off On‑Demand, but can be reclaimed by AWS with a two‑minute notice.

When to choose it

• Fault-tolerant workloads (training jobs with checkpointing)
• Batch processing, offline processing
• Cost-sensitive, flexible-timeline tasks
• CI/CD (ML Ops)

Pros & Cons

• Pros
  • Massive cost reduction
  • No term commitment
• Cons
  • Needs robust checkpointing and restart mechanisms
  • Popular GPU pools can evaporate during peak demand

 

 

Strategy 3: Savings Plans & Reserved Instances

What it is

Pre‑pay (all or partial) for a 1‑ or 3‑year usage commitment and lock in up to 45 % savings on predictable GPU fleets.

When to choose it

• Always‑on inference endpoints powering production APIs
• Finite, forecastable training clusters that run daily
• Stable training workloads

Pros & Cons

• Pros
  • Material discount on capacity you know you will use
  • Shielded from on‑demand price hikes
• Cons
  • Commitments hamper pivoting to newer silicon mid‑term
  • Unused reservations turn into sunk cost

 

Strategy 4: EC2 Capacity Blocks for ML

What it is

A reservation system that guarantees NVIDIA GPU clusters (including H100 and brand‑new P6‑B200) for 1‑ to 182‑day windows inside AWS UltraClusters.

When to choose it

• Deadline‑driven foundation‑model training sprints
• High‑volume inference bursts (marketing launches, demo days)

Pros & Cons

• Pros
  • Slam‑dunk capacity guarantee, no competing Spot revocations
  • Predictable fixed pricing over the block
  • Ultra‑low‑latency EFA fabric for multi‑GPU scaling
• Cons
  • Upfront spend, even if you finish early
  • Availability dependent on lead time in oversubscribed regions

 

Strategy 5: SageMaker Training Plans & HyperPod

What it is

A managed reservation that bundles GPUs, storage, orchestration, and combined with HyperPod’s distributed training libraries and resiliency into one up‑front fee, no cluster babysitting required.

When to choose it

• Prefer fully managed clusters or you’re already using AWS SageMaker
• Multi‑week, distributed training runs that fear “restart hell”
• Scenarios where engineer hours are scarcer than GPU hours

Pros & Cons

• Pros
  • Single line item pricing, no surprise run‑time add‑ons
  • HyperPod checkpointing & auto‑recovery protect long jobs
  • Can stitch two shorter reservations when a single long slot isn’t free, raising capacity odds
  • Distributed training libraries claim up to 40 % faster epochs versus DIY wiring
• Cons
  • Less control over low‑level networking tweaks
  • Not optimal for extremely short-term or highly variable GPU usage

 

 

Choosing Your Mix

No single lever fits the entire ML life‑cycle. A lean portfolio often looks like this:

Stage	Recommended Primary Option	Why
Research & Prototyping	On‑Demand + Spot	Fast iteration; no lock‑in
Large‑Scale Training	Capacity Blocks or SageMaker Plans	Guaranteed throughput during crunch
Continuous Inference	Savings Plans/SageMaker	Predictable traffic, long‑running endpoints
Overflow/Burst	Spot	Swap in when blocks finish early or queries spike

 

While Spot delivers unbeatable economics for bursty tasks, it can’t guarantee delivery dates. Capacity Blocks or managed SageMaker’s offering fill that gap by locking down a fixed cluster ahead of time. Savings Plans then trim the fat on always‑on inference. Shuffle workloads across these buckets as your model matures; the optimal mix today will morph once traffic stabilises or as next‑gen silicon (looking at you, Trn2) hits general availability.

Need help mapping this matrix to your actual Model Training or MLOps pipelines? Cloud Combinator is an AWS-certified partner specialising in GenAI scaling. Drop us a note and our architects will design the right GPU capacity blend and unlock promotional AWS credits to offset your production runs.