Poolside Laguna S 2.1 free on OpenRouter and Vercel AI Gateway
Poolside’s coding-agent model Laguna S 2.1 has free endpoints on both OpenRouter and Vercel AI Gateway. The free tier offers roughly 256K–262K tokens of context—handy for trying the model before paying for the ~1M-context version.
The briefing
Poolside’s Laguna S 2.1 is an open-weight model built for software engineering and agentic coding. It has about 118B total parameters with 8B active, and scores around 70.2% on Terminal-Bench 2.1. OpenRouter and Vercel AI Gateway both offer a free endpoint so you can try it on real repositories first.
What you can use
The free and paid entries serve the same Laguna S 2.1 model; the main difference is context length. On OpenRouter the free model ID is poolside/laguna-s-2.1:free with about 262K tokens of context. On Vercel AI Gateway the free model ID is poolside/laguna-s-2.1-free with about 256K tokens of context. Both support tool calling, bill input and output at $0, and apply rate limits.
Don’t confuse the free tier with the paid namesake: on Vercel, poolside/laguna-s-2.1 offers about 1M tokens of context and is billed normally. If you use the free endpoint, the platform may use your inputs and outputs to train and improve models.
How to use it
- OpenRouter: sign in, pick
poolside/laguna-s-2.1:freeon the model page, and call it through the OpenAI-compatible API. - Vercel AI Gateway: run
npx vercel ai-gateway setup, then set the model topoolside/laguna-s-2.1-freein your client.
Official pages: OpenRouter free model · Vercel AI Gateway free model.