Europe is building its own.
Across the continent the will has arrived: fund the labs, own the stack, stop renting the core of your economy from somewhere else. Mimir is that instinct turned into a concrete artifact — a real model, on a real plan.
mimir-ai.eu · the counsel
Mimir
The counsel of a sovereign Europe.
A frontier coding model — built from scratch, in the open, on European ground. Own weights. Open data. Open licence.
Phase 0 signed · Data & Infra building · 8–9B dense · 3.5T tokens · EUPL-1.2
What Mimir is
A model you consult, not a service you rent.
In Norse myth, Mimir is the wisest of beings — the guardian of the well beneath the world-tree, whose counsel even Odin travelled to seek. That is the shape of this project: intelligence you go to for answers, that answers to you.
Mimir is a coding-specialist language model, roughly 8–9 billion parameters, trained from the ground up on open, European data. Not a fork of a foreign base. Not an API you depend on and hope stays switched on. Its weights are yours to hold, its training recipe is published for anyone to audit, and no single company — including the one building it — can decide what it becomes.
- Built for writing and understanding code
- Trained on open, EU-inclusive corpora + licence-clean distillation
- Released as an EU-resident API and open weights
- Governed by an open charter, not a shareholder
Why now
The best moment to build sovereign intelligence is this one.
Sovereignty is verified, not awarded.
A capability you depend on can be changed or switched off by a decision made elsewhere. The answer is not a better owner — it is weights you hold, a recipe you can read, and governance no one can quietly capture.
The tools are finally open enough.
Open European corpora and licence-clean teacher models make an 8–9B frontier build tractable at a fraction of from-random cost. What needed a nation-state budget a year ago now needs a disciplined plan and a well-chosen cluster.
The plan
Building a frontier model is 70% planning. This part is done.
Mimir follows Posture C: we train our own weights — sovereignty intact — while cutting compute four-to-six-fold by anchoring the data on open, EU-inclusive corpora and distilling from licence-clean European teacher models (Codestral-Mamba, Mistral-Nemo — both Apache-2.0). Not a foreign fork. Not a blank-slate money-pit. The disciplined middle path.
The whole build is written down — every step carries a what to do, a functional contract, and a technical realization — and continuously checked by CI. Two thirds of the work lives in Data and Evaluation; everything is staffed and sequenced around that truth.
5,088 buildable steps each with a functional contract
15 phases a dependency graph, not a straight line
125k H100-hours of compute ceiling 150k, EU cluster
4–6× less compute than training from random
The build, live
Descend the well.
There is no model yet — and that is the honest state of things. Mimir is mid-build. Phase 0 is signed and frozen; Data and Infrastructure are underway. The 5,088 steps below are the real, published plan, checked on every commit. Nothing here is a mock-up. You are watching a frontier model get built in public.
00 Scoping & Governance 81 steps Signed
Budget, quality gates and kill-criteria frozen. Signed 2026-06-13.
01 Compute & Infrastructure 89 steps Building
The training stack, from a local CUDA box to the H100 cluster.
02 Data 1,807 steps Building
Open, EU-inclusive corpora — sourced, deduplicated, decontaminated, sharded.
03 Tokenizer 86 steps Planned
A vocabulary tuned for code across European languages.
04 Architecture 77 steps Planned
The model itself — an 8–9B dense transformer.
⟡ Gate 1 Pretrain-readiness Infra, data, tokenizer and architecture all green. The one big, irreversible spend.
05 Pretraining 261 steps Planned
The main run. ~3.5T tokens on our own weights.
06 Evaluation 1,613 steps Planned
Built alongside the run, blocking at the first checkpoint.
07 Mid-training 26 steps Planned
Extending context and sharpening the base.
08 Post-training 218 steps Planned
Instruction-tuning and preference alignment on open, licence-clean data.
09 Safety 322 steps Planned
Dangerous-capability evaluations. The cyber-offense axis is the release-blocker.
⟡ Gate 2 Safety & release Dangerous-capability evals below threshold. No weights ship until this is green.
10 Tools & Agentic 167 steps Planned
Tool use and agent workflows.
11 Inference 134 steps Planned
Serving the model efficiently.
12 Deploy & API 77 steps Planned
An EU-resident API surface.
13 Monitoring 78 steps Planned
Observability and SLOs in production.
14 Docs & Release 52 steps Planned
Open weights, published data recipe, released to the world.
The promise
Keyless intelligence.
A model is keyless when it satisfies all three at once. This is the bar Mimir is built to clear — and the bar you should hold it to.
No one can change it under you
You hold the weights. No provider can alter, revoke, or re-police a model that already lives on your machine — however its maker’s policies drift, whoever acquires them, whatever a distant order demands.
Anyone can audit what shaped it
The data recipe and training code are published, not taken on faith. What went into Mimir is inspectable by anyone who wants to check — so its values are verifiable instead of promised.
No single party decides what it becomes
Releases are governed by threshold and gate, not by one organisation’s say-so. Not even the people building Mimir hold a master key over what it turns into.
Open by governance
Structured so no one can quietly take it.
The software’s promise has to hold for the project too. Funding that does not own it; a licence that survives a hostile fork; succession that needs no single person. The founders are a bootstrap, not a fixture.
- Licence
- EUPL-1.2 The European Union Public Licence — applied to the code, the tooling, the docs, and the model weights themselves.
- Built
- In the open The plan, the tooling and the training recipe are public from day one — not opened after the fact.
- Answers to
- A charter, not a shareholder Vendor-neutral by design. No single company can capture the project — including the one building it.
Part of something larger
Mimir is the counsel — the well you consult. It is built alongside Heimdallr, the watch: quiet infrastructure for the next generations, safe even from its makers.
Visit heimdallr.vision →Build the future
Europe’s sovereign coding model is being built in the open. Help build it.
Build it
The plan, the spec, and the tooling are open. Read the execution spine, pick a phase, open a pull request.
Open the repository →Follow it
Watch the build advance phase by phase. The status on this page is generated from the repository itself.
Track the build →Back it
Compute, counsel, or a hand on the build — if sovereign, open intelligence is your fight too, come talk.
Get in touch →