Terraform vs OpenTofu
Thirteen of fourteen models named Terraform first on the direct prompt; three named OpenTofu. Terraform was named by fourteen of the fourteen models and OpenTofu by thirteen and Terraform carries 87 labels and OpenTofu 57, so the shares are not directly comparable.
Named in four categories this edition.
Named in one category this edition.
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 infrastructure as code page.
By framing
TerraformFirst choices, of fourteen modelsOpenTofu
Across every category in the November 2026 Edition, Terraform and OpenTofu were named in the same answer 159 times, of the 233 answers naming Terraform and the 166 naming OpenTofu. In those answers OpenTofu took the first choice thirty-three times and Terraform sixty.
Every model, every framing
| 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 | | | | |
Terraform OpenTofu first choice named as an alternative argued againstblank: not namedEach cell is one answer, Terraform on the left and OpenTofu on the right.The direct prompt
Both were the first choice
3 of 14 modelsThe answer named them together, and the judge labeled each a first choice.Terraform first, OpenTofu an alternative
10 of 14 modelsOpenTofu was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
1 of 14 modelsThe answer put something else first and named one of the two as an alternative.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
Terraform49%#1 of 11OpenTofu37%#2 of 11Terraform58%#1 of 13OpenTofu31%#2 of 13Terraform62%#1 of 14OpenTofu18%#2 of 14What the models said about Terraform
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Avoid for tight budgets: Paid platforms like Terraform Enterprise, Pulumi Team, or Spacelift” Grok 4.20 · budget prompt · hard negative
“Terraform under the BSL license (if your org has restrictions)” GLM 4.7 FlashX · negative prompt · hard negative
“Why be cautious: If you are building a commercial product... the BSL license may restrict your use or introduce legal compliance risks.” Gemini 3.5 Flash · negative prompt · soft negative
“Preferred starters: Terraform (or OpenTofu, its open-source fork—use if concerned about HashiCorp's licensing shifts post-2023) for declarative multi-cloud.” Grok 4.20 · negative prompt · first choice
“For most budget-constrained companies, Terraform offers the best balance of features, flexibility, and cost (free), making it the industry standard.” Claude Haiku 4.5 · budget prompt · first choice
“Terraform (or OpenTofu if licensing matters) remains the safest default due to ecosystem maturity, hiring pool, and governance tooling” DeepSeek V4 Flash · scale prompt · first choice
What the models said about OpenTofu
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of six in this category shown.
“it is younger; validate support for niche providers, modules, CI/CD integrations, and state migrations before moving a large estate” Perplexity Sonar · negative prompt · soft negative
“Don't assume a Terraform-to-OpenTofu switch is completely frictionless.” GPT-6 Luna · negative prompt · soft negative
“the practical budget pick is: OpenTofu if you want Terraform compatibility with a permissive, truly open source license and zero software cost” Muse Glimmer 30B · budget prompt · first choice
“many cost-conscious teams are now choosing OpenTofu, which is an open-source fork of Terraform designed to ensure it stays forever free” Qwen 3.7 Flash · budget prompt · first choice
“For most budget-conscious companies, OpenTofu offers the best combination of zero licensing cost, mature features, multi-cloud support” MiniMax M2.5 · budget prompt · first choice
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.