Vercel offers two ways to try InclusionAI's Ling 3.1 Flash free through October 13, 2026, with different consequences when the promotion ends. According to its changelog, the standard model identifier, inclusionai/ling-3.1-flash, begins billing afterward. The alternative, inclusionai/ling-3.1-flash-free, stops serving requests instead.
That choice gives developers a concrete way to control what happens after an experiment: continue service under paid usage, or stop rather than transition automatically to billing. Both identifiers access the model through AI Gateway during the promotion.
Key takeaways · AI-distilled
Ling 3.1 Flash from InclusionAI is a hybrid reasoning modelA model trained to think — generating extended internal reasoning before answering — trading time and tokens for accuracy on hard problems.Full definition → with 560B total parameters and 25B active per tokenThe chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.Full definition →, served with a 262K-token context windowThe maximum amount of text a model can consider at once — its working memory for the current conversation or task.Full definition → on AI Gateway.
Two model IDs behave differently after the free period ends on October 13, 2026: inclusionai/ling-3.1-flash starts billing, while inclusionai/ling-3.1-flash-free stops serving instead.
Vercel positions it for coding, multi-step analysis and tool-using agents with long documents and extended task histories, and it can be selected as the model in coding agents via AI Gateway's coding agents guide.
Terms in this piece · Glossary
reasoning model — A model trained to think — generating extended internal reasoning before answering — trading time and tokens for accuracy on hard problems.
context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.
token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
