🧭 Aggregators (one key, many providers) · no card · provisional — added recently, two weeks of probes still to pass · live — last verified by a probe on 2026-09-17 · opper.ai · back to the whole list
EU-hosted gateway over 700+ models whose free models — Gemma 4 31B and Gemma 4 26B on Google’s route, Laguna S 2.1 and XS 2.1 through Poolside — answer an account with no card on file; every other model needs a card and credits
gemma-4-31b
The pricing FAQ: “Sign up needs no credit card: you get an API key straight away and the free models work in the playground and the API. Add a card to use premium models, pay-as-you-go with no minimum.” The llms.txt names one of them — “gemini/gemma-4-31b is a free model, so this call works before you add a card. It runs on a US-hosted route.” — and the model directory at opper.ai/models flags five rows free: gemini/gemma-4-31b, gemini/gemma-4-26b-moe, poolside/laguna-s-2.1, poolside/laguna-xs-2.1 and Talkie 1930, a 13B model trained on pre-1931 text. The keyless catalog publishes no price for them, and no page gives the free models a quota or a rate limit. Paid usage is billed at provider rates with “a 3% fee on credit purchases”. The operator is Opper Technology AB, in Sweden, on AWS Stockholm. Read 2026-09-17
https://api.opper.ai/v3/compatOPPER_API_KEY — get one at https://platform.opper.ai/settings/api-keysANTHROPIC_BASE_URL): https://api.opper.ai/v3/compatgemini/gemma-4-31b, gemini/gemma-4-26b-moe, poolside/laguna-s-2.1, poolside/laguna-xs-2.1gemini/gemma-4-31b is a free model, the free models work in the playground and the API; ids checked in https://api.opper.ai/v3/models?limit=0Generated from registry.yaml on 2026-09-18 and re-verified twice a week; the full list, the Atom feed and the machinery are at https://github.com/mvalentsev/awesome-free-ai-coding.