Integration guide · Coding agent

Aider on EU-hosted open models

Run Aider, the terminal pair programmer, on EU-hosted open models: two environment variables and the openai/ prefix on the model name. OPENAI_API_BASE and OPENAI_API_KEY, or openai-api-base and openai-api-key in .aider.conf.yml.

Settings from the official documentation, checked on 12 October 2026. Not run end to end by us.

API format: OpenAI-compatible
Base URL: https://getfrontiereai.eu/api/v1
Where it goes: OPENAI_API_BASE and OPENAI_API_KEY, or openai-api-base and openai-api-key in .aider.conf.yml.
Your prompts: Straight from your machine to us

Setup

1.Point Aider at the gateway

Prefix the Frontière AI slug with openai/ so Aider routes it to the OpenAI-compatible base URL. Set the weak model as well: it writes commit messages and summaries.

bash

export OPENAI_API_BASE=https://getfrontiereai.eu/api/v1
export OPENAI_API_KEY=sk-front-...
aider --model openai/glm-5.2 --weak-model openai/qwen3.6-35b

2.Give it the right edit format

For a model it does not know, Aider falls back to rewriting whole files, which is slow and costly. Declare diff edits and the context window in two small files next to your project or in your home directory.

yaml

# .aider.model.settings.yml
- name: openai/glm-5.2
  edit_format: diff

# .aider.model.metadata.json
# { "openai/glm-5.2": { "max_input_tokens": 256000, "max_output_tokens": 32000,
#   "input_cost_per_token": 0, "output_cost_per_token": 0,
#   "litellm_provider": "openai", "mode": "chat" } }

Which model to pick

24 live models have tool calling measured by a real call through the gateway. Models labeled EU sovereign run at European providers; fast-access models are served through US-controlled infrastructure. Prices are per 100,000 tokens, margin and VAT included.

Model id	Provider	Label	Context	Input	Output
pixtral-12b	Scaleway	EU sovereign	131k	€0.0336	€0.0336
mistral-small-3.2-24b	Scaleway	EU sovereign	—	€0.0252	€0.0588
gemma-4-26b	AKI.IO	EU sovereign	256k	€0.0168	€0.084
gpt-oss-120b	Scaleway	EU sovereign	—	€0.0252	€0.1008
mistral-small-4-119b	Mistral AI	EU sovereign	262k	€0.0278	€0.1109
deepseek-v4-flash-0731	Scaleway	EU sovereign	256k	€0.0672	€0.1344
qwen3-coder-30b	Scaleway	EU sovereign	262k	€0.0336	€0.1344
llama-3.3-70b	Scaleway	EU sovereign	—	€0.1512	€0.1512
qwen3.6-35b	Scaleway	EU sovereign	262k	€0.042	€0.252
deepseek-v4.1-flash	AKI.IO	EU sovereign	1M	€0.1008	€0.3024
qwen3-235b	Scaleway	EU sovereign	—	€0.126	€0.378
apertus-v1.5-70b	Infomaniak	EU sovereign	100k	€0.1294	€0.462
qwen3.8-27b	Scaleway	EU sovereign	262k	€0.1008	€0.5544
qwen3.5-397b	Scaleway	EU sovereign	—	€0.1008	€0.6048
mistral-large-4	Mistral AI	EU sovereign	524k	€0.2514	€0.7725
glm-5.2	Scaleway	EU sovereign	256k	€0.3024	€0.924
glm-5.3	AKI.IO	EU sovereign	524k	€0.3024	€0.924
gemma-3-27b	OpenRouter	Fast access (US)	131k	€0.0135	€0.074
qwen3.8-flash	OpenRouter	Fast access (US)	—	€0.0252	€0.0773
glm-5.3-flash	Modal	Fast access (US)	1M	€0.0689	€0.2268
deepseek-v4-pro	OpenRouter	Fast access (US)	—	€0.2453	€0.5124
muse-spark-1.1	OpenRouter	Fast access (US)	—	€0.205	€0.6956
muse-spark-1.2	OpenRouter	Fast access (US)	—	€0.205	€0.6956
kimi-k3	Modal	Fast access (US)	1M	€0.4536	€2.268

Good to know

Aider edits files through text formats parsed from the reply, so tool calling is not required: more models of the catalog qualify.
The warning "Unknown context window size and costs" is harmless; the metadata file above silences it.

Where your prompts go

Aider calls the API directly from your machine. Its analytics are opt-in and, per its docs, never include code, chats or keys.

On our side, a model labeled EU sovereign runs at a European provider, and the gateway itself runs in Paris on Vercel, a US company — our privacy page says so. Billing keeps the model, the token counts and the amount, never the prompt or the reply.

Sovereignty →Privacy →

Sources

Official documentation, checked on 12 October 2026:

FAQ

Does Aider work with Frontière AI?

Yes. OPENAI_API_BASE and OPENAI_API_KEY, or openai-api-base and openai-api-key in .aider.conf.yml. The setting comes from Aider's official documentation, checked on 2026-10-12; we have not run it end to end.

Which Frontière AI model should I use with Aider?

One with measured tool calling, preferably labeled EU sovereign: pixtral-12b, mistral-small-3.2-24b, gemma-4-26b and gpt-oss-120b. The 24 candidates are listed on this page with their context window and price.

Do my prompts stay in Europe with Aider?

Aider calls the API directly from your machine. Its analytics are opt-in and, per its docs, never include code, chats or keys. On our side, a model labeled EU sovereign runs at a European provider, and the gateway itself runs in Paris on Vercel, a US company — our privacy page says so. Billing keeps the model, the token counts and the amount, never the prompt or the reply.

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