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CI/CD platforms · October 2026 Edition

GitHub Actions vs GitLab CI/CD

Ten of fourteen models named GitHub Actions first on the direct prompt; two named GitLab CI/CD. Both were named by all fourteen models and GitHub Actions carries 68 labels and GitLab CI/CD 73, so the shares are not directly comparable.

GitHub Actions

endorsed leader

Named in one category this edition.

GitLab CI/CD

accepted challenger

Named in one category this edition.

First-choice share68%23%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.

Negative rate7%7%Negative labels as a share of the product's labels, 0 to 100.

Rank in category#1#2A position in a field of 10; printed, not drawn.

Labels6873A count; the two differ.

The two percentage rows are drawn on one 0 to 100 track, GitHub Actions reading right to left. Rank and label count are printed, not drawn.GitHub Actions vs CircleCI · GitHub Actions vs Buildkite · GitLab CI/CD vs CircleCI

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the CI/CD platforms page.

By framing

How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.

GitHub ActionsFirst choices, of fourteen modelsGitLab CI/CD

Direct102

Paraphrase87

Comparative112

Budget-constrained141

Scale-constrained63

Negative005 against GitHub Actions · 5 against GitLab CI/CD

Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.

Across every category in the October 2026 Edition, GitHub Actions and GitLab CI/CD were named in the same answer 196 times, of the 210 answers naming GitHub Actions and the 223 naming GitLab CI/CD. In those answers GitLab CI/CD took the first choice twenty-one times and GitHub Actions ninety-nine.

Every model, every framing

The eighty-four answers behind the chart above, one cell each: where GitHub Actions and GitLab CI/CD stood in it.

Model	Direct	Paraphrase	Comparative	Budget-constrained	Scale-constrained	Negative
Claude Haiku 4.5
GPT-5.4 mini
Gemini 3.5 Flash
Perplexity Sonar
Grok 4.20
Mistral Small
DeepSeek V4 Flash
Llama 4 Maverick
Qwen 3.7 Flash
Kimi K2
GLM 4.7 FlashX
MiniMax M2.5
GPT-6 Luna
Muse Glimmer 30B

GitHub Actions

GitLab CI/CD

first choice

named as an alternative

argued againstblank: not namedEach cell is one answer, GitHub Actions on the left and GitLab CI/CD on the right.

The direct prompt

The plain question, one answer per model, grouped by where GitHub Actions and GitLab CI/CD stood in it.

GitHub Actions first, GitLab CI/CD an alternative

10 of 14 modelsGitLab CI/CD was named in the answer but not as the choice, or not at all.

GPT-5.4 miniGitHub Actions alternatives: Azure Pipelines, CircleCI

Gemini 3.5 FlashGitHub Actions alternatives: Argo CD, GitLab CI/CD, Harness

Grok 4.20GitHub Actions alternatives: CircleCI, GitLab CI/CD

DeepSeek V4 FlashGitHub Actions alternatives: GitLab CI/CD

Qwen 3.7 FlashGitHub Actions alternatives: GitLab CI/CD

Kimi K2GitHub Actions alternatives: CircleCI, GitLab CI/CD

GLM 4.7 FlashXGitHub Actions alternatives: Azure Pipelines, CircleCI, GitLab CI/CD

MiniMax M2.5GitHub Actions alternatives: CircleCI, GitLab CI/CD

GPT-6 LunaGitHub Actions alternatives: Buildkite, CircleCI, GitLab CI/CD

Muse Glimmer 30BGitHub Actions alternatives: GitLab CI/CD

GitLab CI/CD first, GitHub Actions an alternative

2 of 14 modelsGitHub Actions was named in the answer but not as the choice, or not at all.

Perplexity SonarGitLab CI/CD alternatives: GitHub Actions

Mistral SmallCircleCI, GitLab CI/CD alternatives: Buildkite, JetBrains TeamCity

Neither was named

2 of 14 modelsThe answer made no first choice from these two in this category.

Claude Haiku 4.5no first choice

Llama 4 Maverickno first choice

Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.

Small business

GitHub Actions leads by sixty points.

GitHub Actions#1 of 9

GitLab CI/CD#2 of 9

The full small business standing →

Mid-marketThe figures above

GitHub Actions leads by forty-five points.

GitHub Actions#1 of 10

GitLab CI/CD#2 of 10

The full mid-market standing →

Enterprise

The order flips: GitLab CI/CD leads at enterprise.

GitLab CI/CD#1 of 12

GitHub Actions#2 of 12

The full enterprise standing →

What the models said about GitHub Actions

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.

“GitHub Actions workflows that trust third-party actions or pull-request code too much” GPT-6 Luna · negative prompt · soft negative

“This is currently the easiest place to start, but it can become the most expensive.” Qwen 3.7 Flash · negative prompt · soft negative

“Moderate Caution: GitHub Actions ... Common misconfigs in public pipelines” Grok 4.20 · negative prompt · soft negative

“"GitHub Actions is the right default for the vast majority of teams in 2026, and it's where I'd start unless you have a specific reason not to."” Muse Glimmer 30B · budget prompt · first choice

“If teams are already on GitHub, GitHub Actions is the de facto default: bundled with GitHub Enterprise, 20,000+ marketplace actions.” Muse Glimmer 30B · scale prompt · first choice

“GitHub Actions | Teams already on GitHub Enterprise | Native integration, 20,000+ marketplace actions, SOC 2 certified” Kimi K2 · scale prompt · first choice

What the models said about GitLab CI/CD

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.

“Over 810 hours, caused by faulty updates and overload of CI/CD services during periods of heavy traffic.” Muse Glimmer 30B · negative prompt · soft negative

“GitLab specifically warns about shared non-ephemeral runners and privileged containers” GPT-6 Luna · negative prompt · soft negative

“Vendor Lock-in Risk ... Self-hosted GitLab is notoriously resource-hungry.” Qwen 3.7 Flash · negative prompt · soft negative

“Some of the top recommendations include: 1. GitLab CI: A comprehensive CI/CD solution integrated within the GitLab DevSecOps platform.” Llama 4 Maverick · paraphrase prompt · first choice

“GitHub Actions or GitLab CI/CD offer the best combination of features, ease of use, and generous free tiers.” Kimi K2 · budget prompt · first choice

“GitHub Actions and GitLab CI/CD are the safest defaults if you're already on those ecosystems” DeepSeek V4 Flash · scale prompt · first choice

Also compared

GitHub Actions vs CircleCI GitHub Actions vs Buildkite GitLab CI/CD vs CircleCI GitLab CI/CD vs Buildkite All six head-to-head pages and the full CI/CD standing

Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.