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Case Study / GenAI

GenAI cost governance at a global bank.

Twenty four GenAI use cases. Eight figures of annual run rate. No FinOps coverage. This is how a global bank brought the rollout back inside finance and shaved 34 percent off run rate.

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A tier one global bank turned an eight figure GenAI run rate into a governed program in twelve weeks. Here is what worked and what did not.

Key takeaways

  • Eight figures of annual GenAI spend across twenty four use cases, none tagged or charged back.
  • Run rate trimmed by 34 percent in twelve weeks without slowing any use case in production.
  • Three vendor contracts renegotiated with new rate cards and model swap rights.
  • Single AI council stood up across finance, legal, security, and engineering.
  • Chargeback and unit economics targets in production for every use case.
  • Bank now runs a quarterly review against the same scorecard.
  • The biggest lever was model right sizing. Most use cases did not need the flagship model.

A tier one global bank engaged Redress Compliance to bring a sprawling GenAI rollout back under cost governance. Twenty four use cases were live or in pilot. Annual run rate had crossed eight figures. No team was tagging, charging back, or measuring unit economics.

Twelve weeks later, the bank had cut run rate by 34 percent without pulling any use case from production. The model below shows what was done, what worked, and what did not.

About the client

Tier one global bank

A retail and commercial bank operating in more than thirty countries with a top five capital position in its home region. Engineering organization of roughly twelve thousand people. AI adoption began in early 2024 with internal copilots, customer support assistants, and document analysis.

AI footprint at engagement start

Four foundation model vendors, eleven SaaS tools with embedded AI features, and seven internal hosted models. Two cloud providers carried most of the underlying compute.

  • Foundation model APIs. Two major vendors at scale, two smaller vendors in pilot.
  • Embedded AI in SaaS. Copilot, ServiceNow Now Assist, and Salesforce Einstein among others.
  • Internal models. Seven open source models running on managed GPU infrastructure across two regions.

The challenge

The problem was visibility, ownership, and the rate card. None of them existed.

No tagging, no chargeback

Spend rolled up under a generic cloud cost code. No team or use case attribution. Finance had a single growing line item. Engineering teams had no visibility into their own consumption.

Twenty four owners, no operator

Every use case had a sponsor. None of them owned cost. The AI center of excellence had charter but no budget authority. Procurement had signed the contracts and moved on.

Three large contracts on retail pricing

Two foundation model vendors were on standard rate cards. One had a basic enterprise discount that no one had renegotiated in eighteen months. The fourth had no contract at all, just credit card billing.

Run rate reduction by lever

Lever Use cases touched Saving Time to value
Model right sizing14$5.2M4 to 6 weeks
Prompt and context trim6$1.9M2 to 4 weeks
Rate card renegotiation3 contracts$3.4M8 to 12 weeks
Quota and caps24 use cases$0.6M2 weeks
Total verified savingAll in scope$11.1M12 weeks

Approach. Twelve week engagement

The work was sequenced into three four week phases. Visibility, levers, then controls.

Phase 1. Visibility (weeks 1 to 4)

Stood up tagging across every model call. Built the use case level dashboard. Surfaced unit economics for the top ten use cases. Reconciled vendor invoices against internal consumption logs.

Phase 2. Levers (weeks 5 to 8)

Model right sizing across fourteen use cases. Prompt and context trim across six. Rate card negotiation across three vendor contracts. Quota and alerting deployed across all twenty four use cases.

Phase 3. Controls (weeks 9 to 12)

Chargeback live across the engineering org. Unit economics targets per use case agreed and signed off by product leads. AI council convened with monthly cadence. Quarterly review framework handed to FinOps.

Twelve weeks. Twenty four use cases. Eleven million dollars. The biggest single lever was choosing the right model for the job.

Results

Run rate down 34 percent. Three contracts renegotiated. Governance model in production.

Financial impact

Annual run rate reduced by roughly eleven million dollars at exit. Two thirds came from model right sizing and prompt trim. One third came from rate card renegotiation. No use case slowed or stopped.

Contractual impact

Two foundation model contracts renegotiated with new rate cards, auto renew removed, and model swap rights added. One enterprise SaaS add on renegotiated to a usage based structure.

Operational impact

Tagging at the team and use case level on every model call. Showback dashboards live. Chargeback running with finance ownership. Unit economics targets in production for every use case.

Lessons learned

Three lessons every enterprise running a sprawling GenAI rollout should bank.

Tagging is the first dollar

Until every model call carries a team and use case tag, every conversation is a debate. With tagging, the conversation is a review of numbers.

Model choice beats prompt design

Prompt and context trim were valuable. Model right sizing was bigger. Most use cases simply did not need the flagship model the team had chosen by default.

Procurement and FinOps belong on the same call

The rate card renegotiation worked because procurement walked into the vendor meeting with FinOps usage data. Separately they were softer. Together they were credible.

Suggested reading

What to do next

  1. Pull a single run rate view across every active GenAI use case.
  2. Stand up tagging at the team and use case level.
  3. Identify the two or three use cases on flagship models that do not need them.
  4. Map every active GenAI contract against negotiated rate cards.
  5. Stand up a single AI council across finance, legal, security, and engineering.
  6. Run the engagement against a twelve week sequence. Visibility, levers, controls.
  7. Contact us when annual GenAI spend crosses one million dollars.

Frequently asked questions

Can you share the bank's name?

No. The engagement is covered by NDA. The pattern and the numbers are accurate, the identifying details are not.

Was the 34 percent reduction a one off?

No. It is in line with the savings we see across most enterprises with a sprawling GenAI rollout. The exact percentage varies by maturity of FinOps.

Did any use case slow down or stop?

No. Run rate fell while every use case stayed in production. Model right sizing actually improved latency in three cases.

How long did the engagement take?

Twelve weeks end to end. Visibility in weeks one to four, levers in weeks five to eight, controls in weeks nine to twelve.

What does this kind of engagement cost?

Engagement fees are dwarfed by realized savings. For an eight figure run rate, payback is typically inside the first quarter.

Can a smaller enterprise apply the same playbook?

Yes. The sequence works at any scale. Below one million dollars annual AI spend you can usually run it internally with this playbook as the reference.

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34%
Run Rate Reduction
24
Use Cases
12 wk
Engagement Length
$11M
Annual Saving
100%
Buyer Side

We were running twenty four AI experiments. Finance saw one growing line. Engineering saw twenty four growing teams. Both were right.

Group CIO
Global Bank, Tier 1
Deep Library

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