Models · OpenAI

GPT-OSS 120B, run in Paris by Scaleway.

GPT-OSS 120B is an open-weight model by OpenAI that works with text, released under the Apache-2.0 licence. On Evanesca, Scaleway runs it in Paris: your prompts are processed in France, and Evanesca keeps no copy of them. If Scaleway does not answer, OVHcloud takes over, in Europe too.

Checked on 20 Oct 2026

GPT-OSS 120B

by OpenAI · Apache-2.0

Paris, France Checks 5/6

Input / M: €0.252
Output / M: €1.008
Quick question: €0.0005

Prices per million tokens, VAT included. Quick question: 300 tokens in, 400 out.

The model at a glance

Maker: OpenAI
Licence: Apache-2.0
Size: 117B (5.1B active) parameters
Context: Not verified yet
Type: Text
Tool calling: Yes measured by a real call
Reasoning: Yes — it thinks before answering those tokens are billed as output
Run by: Scaleway Scaleway SAS, Paris — iliad group, no US parent Fallback: OVHcloud
Where it runs: Paris, France
Checks: 5/6 · Security ✕ Passed: Licence, Provenance, GDPR, Benchmarks and Live test
Price: €0.252 per million input tokens · €1.008 per million output tokens VAT included; reasoning tokens count as output
Open weights: Yes published by the maker: an operator can run the model
Model card: huggingface.co/openai/gpt-oss-120b

Where your prompts go

Here is the route of a message sent to GPT-OSS 120B, end to end. No call to the model leaves Europe: not as a backup, not when servers are busy.

From your browser to EvanescaEvanesca passes your message straight on to Scaleway. It stores neither the prompt nor the answer: both stay in memory only while the answer is written.
Scaleway, ParisScaleway runs GPT-OSS 120B in Paris, France. It is a French company with no US parent: out of the CLOUD Act's direct reach. Scaleway may keep and read requests that cause errors or look abusive, for up to 14 days (Scaleway's data privacy page).
Back to you, with its passportThe answer comes back with its passport: model, operator, country, and what was kept. Your history lives in your browser; about this message, Evanesca keeps only billing data — tokens and cost.

What it costs

€0.252 per million input tokens and €1.008 per million output tokens, VAT included. Three typical exchanges on GPT-OSS 120B:

COST OF AN EXCHANGE · VAT INCLUDED
Example	Tokens in	Tokens out	Cost
A quick question	300	400	€0.0005
A long document to summarise	15,000	800	€0.0046
A message late in a long conversation	40,000	2,000	€0.0121

€2 of credit covers about 4,100 quick questions on this model. Reasoning tokens count as output, so a model that thinks first can cost more than these examples. The exact cost of each answer shows under it. All prices.

Licence

OpenAI publishes GPT-OSS 120B under the Apache-2.0 licence. Apache-2.0 is a permissive open-source licence: it allows commercial use.

The official model card is the reference.

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Every model, with its operator and where it runs

Frequently asked questions

Where does GPT-OSS 120B run on Evanesca?

In Paris, France, on Scaleway's servers. Scaleway is a French company with no US parent, so your prompts stay out of the CLOUD Act's direct reach. If Scaleway does not answer, OVHcloud takes over, in France too. No call to the model leaves Europe: not as a backup, not when servers are busy.

Does Evanesca keep what I send to GPT-OSS 120B?

No. The prompt and the answer stay in memory only while the answer is written, and your history lives in your browser; about your messages, Evanesca keeps only billing data — tokens and cost. Scaleway may keep and read requests that cause errors or look abusive, for up to 14 days (Scaleway's data privacy page).

How much does GPT-OSS 120B cost?

€0.252 per million input tokens and €1.008 per million output tokens, VAT included. A quick question — 300 tokens in, 400 out — costs about €0.0005. There is no subscription: credit starts at €2.

Can GPT-OSS 120B call tools?

Yes: a real call through Scaleway returned proper tool calls (function calling).

Which licence is GPT-OSS 120B under?

Apache-2.0. Apache-2.0 is a permissive open-source licence: it allows commercial use.

Which checks has GPT-OSS 120B passed?

5 of 6: Licence, Provenance, GDPR, Benchmarks and Live test. Missing: Security — not checked yet, or checked without meeting the pass mark. Its passport shows the same stamps; how each check works.

Does OpenAI see what I type?

No. OpenAI published the weights, and Scaleway runs them in France: your prompts go to Scaleway's servers, not to OpenAI.