In short
The DORA metrics still work now that AI writes a large share of the code, but only in pairs. Read a speed number, such as how often you deploy, only next to a stability number, such as how often a deployment fails.
AI now writes a large share of the code.
DORA's own reports from 2024 and 2025 show why reading a single delivery number on its own has stopped working.
DORA, short for DevOps Research and Assessment, is Google's research program on how companies build and ship software.
What follows covers what changed between those reports, which DORA metric misleads when read alone, and 3 changes for your next quarterly review.
Did AI make software delivery faster or less stable?
Both: DORA's 2025 report found that AI adoption is now linked to more delivery output and, at the same time, to less delivery stability.
DORA's 2025 report, State of AI-assisted Software Development, is based on survey answers from nearly 5,000 technology professionals. In DORA's 2025 survey, 90% said they use AI at work. Its announcement puts the result this way: "we observe a positive relationship between AI adoption on both software delivery throughput and product performance". It adds: "AI adoption does continue to have a negative relationship with software delivery stability."
Throughput means how many changes reach production in a period. Stability means how often a change fails and has to be fixed or rolled back.
JetBrains, a maker of programming tools, surveyed more than 15,000 developers in mid-2026. On average, the developers in JetBrains' 2026 survey said AI agents fully write about 47% of their code. Measured data on public code shows how fast AI help spread before that. Researchers at the Complexity Science Hub in Vienna checked public code on GitHub and reported in the journal Science in 2026. In the US, about 5% of Python functions were written with substantial AI help in 2022, and an estimated 29% by the end of 2024.
What were the DORA metrics built to tell you?
The DORA metrics are engineering metrics for how fast and how safely changes to a piece of software reach its users. They were always meant to be read together.
DORA's official guide to the metrics says they "are best suited for measuring one application or service at a time". For years DORA was known for 4 of them, often called the 4 key metrics or simply the DORA metrics. The latest version of the guide, updated in January 2026, lists 5. It describes the change as "shifting from the original four keys to the current five-metric model".
The guide groups 3 of them under throughput. Change lead time measures how long a change takes to go from a developer's finished code to running in production, in front of real users. Deployment frequency is how often you release a new version. When a deployment fails, failed deployment recovery time tells you how fast you recovered.
The guide groups the other 2 under instability. Change fail rate counts how often a deployment needs an urgent fix or a rollback. Deployment rework rate, the metric added to the original 4, counts the deployments nobody planned. The guide defines it as "the ratio of deployments that are unplanned but happen as a result of an incident in production".
The same guide explains why the metrics belong together: "speed and stability are not tradeoffs. In fact, we see that the metrics are correlated for most teams." Teams that shipped more often were usually also more stable. That link made the metrics a useful diagnosis: if speed rose and stability did not, something was wrong.
What changed between DORA's 2024 and 2025 reports?
DORA's 2024 and 2025 reports disagree about speed and agree about stability. AI adoption was linked to slightly lower throughput in 2024, to higher throughput in 2025, and to lower stability in both years.
The 2024 report, Accelerate State of DevOps Report 2024, was DORA's 10th annual report, published in October 2024. It opened its finding on AI adoption with "Contrary to our expectations, our findings indicate that AI adoption is negatively impacting software delivery performance." DORA's 2024 report estimated that every 25% increase in AI adoption was linked to 1.5% less delivery throughput. In the same 2024 estimate, it was also linked to about 7% less delivery stability. These are estimates from survey data, and DORA says so.
The report's explanation was the size of each change: "since AI allows respondents to produce a much greater amount of code in the same amount of time, it is possible, even likely, that changelists are growing in size." A changelist is one batch of code changes, like a pull request. The report adds that "DORA has consistently shown that larger changes are slower and more prone to creating instability". It also reminds readers of what it calls "the importance of small batch sizes".
The 2025 report reversed the first part of the 2024 finding and kept the second. AI adoption was now linked to higher throughput, and it was still linked to lower stability.
DORA's 2025 explanation is that "AI accelerates software development, but that acceleration can expose weaknesses downstream." Downstream means later in the delivery process, after the code is written. Without strong safeguards, which DORA calls control systems, "an increase in change volume leads to instability". DORA gives strong automated testing, mature version control practices and fast feedback loops as examples of such safeguards. Fast feedback means learning quickly when something breaks.
| What DORA reported | DORA 2024 report | DORA 2025 report |
|---|---|---|
| Delivery throughput | 1.5% lower for every 25% increase in AI adoption (an estimate) | Higher with more AI adoption (a positive relationship) |
| Delivery stability | About 7% lower for every 25% increase in AI adoption (an estimate) | Still lower with more AI adoption (a negative relationship) |
| DORA's explanation | Changes are probably growing in size | More change volume without strong control systems |
| Data behind it | Survey estimates, in DORA's 10th annual report | Survey answers from nearly 5,000 technology professionals |
Which DORA metric misleads when you read it alone?
A speed number, such as deployment frequency, misleads when you read it alone. Read it only next to a stability number, and read the stability number next to the safeguards behind it, such as your automated tests.
If your dashboard shows deployment frequency rising and you call that good news, you're reading only the number that improved. The number you're not reading is stability, and that's the one that shows the incidents. A metric that used to tell you what was wrong now only tells you where to look.
The likely reason for lower stability, as DORA's 2024 report suggested, is the size of each change. In 2026, researchers at Carnegie Mellon and Stanford measured it at one mid-sized company with 802 developers. The company had committed to doubling merged pull requests per engineer since mid-2025.
In that 2026 study, after developers started to use AI coding tools, their average pull request was about 37% larger. Each reviewer's load roughly doubled, and pull requests written with AI took about 20% longer from the first human review to merge. Pull requests got larger and their review took longer, which is the mechanism DORA's 2024 report suspected. Merge and revert rates held steady there, so the study shows the strain on review, not more failures.
In the same 2026 study, the share of pull requests with at least one human review fell from 89% to 68%. Over the same time, the share with a review by an AI tool rose from about 19% to about 84%.
Quality is the other half. Another 2026 study from Carnegie Mellon University used data from the code itself instead of a survey. Its researchers followed about 800 open-source projects that started to use the AI coding tool Cursor. They compared them with almost 1,400 similar projects that did not. In the first month, the projects added 3 to 5 times more lines of code, and after 2 months that gain was gone. In that study, warnings from code-checking tools rose 30%, code complexity rose 41%, and both stayed high.
An engineering analytics company looked at tool data from 22,000 developers for its 2026 report. It says something DORA doesn't: "High-performing engineering organizations, those with mature DevOps practices, high DORA metrics scores, and disciplined delivery processes, are experiencing the same downstream deterioration as everyone else." It gives this reason: "Perception lags reality. Telemetry does not." A survey records how people feel, and feelings change later than the facts. Numbers taken from the tools show the change as it happens.
DORA published its own warning next to its 2025 report. The companion document, the DORA AI Capabilities Model, names 7 capabilities a company needs, from a "clear and communicated AI stance" to a "user-centric focus". It finds that "in the absence of a user-centric focus, AI adoption can have a negative impact on team performance." I read that as a sign that adopting AI is a decision for the whole organization. Reading a single number on its own is a fast way to get that decision wrong.
I disagree with one part of how DORA describes what AI does to teams. Its 2025 report calls AI an amplifier: "AI doesn't fix a team; it amplifies what's already there." Good teams get better and struggling teams get worse. That's the strongest version of the idea, and it's mostly right.
But one engineering analytics company measured the good teams getting worse too. So I think the amplifier idea is true and also dangerous, because it lets a strong team believe it's safe. My rule: look at your stability numbers even when your team is good, and especially then.
3 changes for your next quarterly review
Make 3 changes: pair every speed number with a stability number, split numbers by AI help, and check your safeguards before buying more AI tools.
First, never report deployment frequency on its own. Put change fail rate right next to it, every time, so speed and stability are always read together. If your dashboard does not record change fail rate, someone has to link each failed deployment, urgent fix or rollback to the deployment that caused it.
Second, split your delivery numbers by whether AI helped write the change. Do it per service or per repository, the level DORA built these metrics for. That limit is DORA's own rule. Its 2024 report says the metrics "should be used at the application and service levels" and not to compare teams, "and certainly not to compare individuals." That rule is about delivery metrics, which describe a service, not the work of a person.
Splitting the numbers by AI help is the hard change. It needs 2 numbers your dashboard probably doesn't have. The first is which merged changes were written with AI help. The second is how many of those had to be corrected soon after.
I founded Aidealy, which makes software that measures the work engineering teams ship. Delivery tools measure how fast and how often you ship, and Aidealy shows that too. But its main focus is the people and AI agents who do the work, and the quality and lasting impact of what they ship, including the bugs that surface later. So a question such as which repositories had the most AI-assisted changes corrected within 30 days this quarter has an answer.
Third, before you buy more AI tools, check whether your automated tests and your rollback process can absorb much more change. No dashboard number answers this: the team has to review its tests and its rollback process by hand. DORA's 2025 finding is that without strong control systems, more change volume leads to instability. Its AI Capabilities Model also found that AI-assisted teams perform better when they use rollback often.
What the DORA metrics and reports cannot tell you
The numbers from DORA and the other studies cannot tell you what will happen in your organization, or whether the work was worth doing.
DORA's 2025 numbers are survey answers from nearly 5,000 people, and its 2024 figures are estimates. Both show that AI adoption and lower delivery stability moved together. The Carnegie Mellon studies measure code instead of asking people, but one company and a set of open-source projects are not the whole industry. I don't know whether these findings describe your team. Neither do their authors.
Your own stability number next to your own speed number is the only evidence here that's about your team. Even that only tells you how the work went. Whether the work was worth doing is a different question, and that judgment stays with you.
Sources
- DORA, Accelerate State of DevOps Report 2024, announcement
- DORA, State of AI-assisted Software Development 2025, announcement
- DORA, software delivery performance metrics guide
- DORA AI Capabilities Model
- LinearB, 2026 Software Engineering Benchmarks Report
- Faros AI, The AI Engineering Report 2026
- DX, State of AI Impact in Engineering, second quarter (Q2) 2026
- JetBrains, How Much Code Do Developers Really Let Agents Write?, 2026
- Daniotti, Wachs, Feng and Neffke, Who is using AI to code? Global diffusion and impact of generative AI, Science, 2026
- He, Agarwal, Denisov-Blanch, Azaletskiy, Koyejo and Vasilescu, AI Writes Faster Than Humans Can Review: A Longitudinal Study of an Enterprise 2x Mandate, 2026
- He, Miller, Agarwal, Kästner and Vasilescu, Speed at the Cost of Quality: How Cursor AI Increases Short-Term Velocity and Long-Term Complexity in Open-Source Projects, 2026
Watch the video on YouTube: https://www.youtube.com/watch?v=m37kcUhJXGM
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