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MamayLM v2.0: Ukrainian LLMs and the Free Mamay AI Chat

INSAIT released Gemma 3–based 12B and 27B models with Ukrainian support, multimodal features, and infrastructure hosted in Ukraine.

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In brief

The MamayLM team at INSAIT Institute launched a second generation of Ukrainian LLMs — MamayLM v2.0 on Gemma 3 (12B and 27B) plus the public Mamay AI chat. Models and services target the Ukrainian language and local infrastructure.

What happened

According to DOU, MamayLM v2.0 builds on Google’s Gemma 3 in two sizes: 12B and 27B. The 27B build is described as the largest open model in the line tuned for Ukrainian. Ukrainian and English are supported, with text and image inputs; versus v1, instruction following, localization, and multimodal tasks improved.

Mamay AI is a free public chat on MamayLM v2.0: text, images, audio, web search, reasoning modes, and long documents. Weights and access live on the MamayLM site; infrastructure for related services (including Lapathoniia) is physically hosted in Ukraine.

For developers, the signal is clear: local open-weight models for niche languages can compete on domain quality, not just parameter count.

Why it matters

Ukrainian products often rely on English-first LLMs plus translation post-processing. A specialized fine-tuned model can improve tone, terminology, and local context. Open 27B weights enable self-hosting, RAG, and experiments without a single foreign API dependency.

In-country infrastructure cuts latency for users and simplifies data residency for public sector and local business.

In practice

  1. Benchmark Mamay AI against your current chat stack on typical Ukrainian prompts (support, docs, code).
  2. For self-hosting, review Gemma 3 licensing and GPU needs for 27B.
  3. For RAG, test long-context behavior and citation quality with web search enabled.
  4. Watch INSAIT updates — the line may anchor vertical fine-tunes (education, healthcare, gov services).
  5. Do not skip security review: “local model” does not replace PII filtering and prompt auditing.

Takeaway

MamayLM v2.0 is a meaningful step for Ukrainian open-source AI: large weights, multimodality, and a public chat. The DOU announcement matters for teams building in Ukrainian or seeking alternatives to Western-only APIs.