Laguna S 2.1
#19 in Open-Source LLMsPoolside · v2.1 · since 21. Juli 2026 · 6× · last seen Jul 23, 2026
39
Momentum
Laguna S 2.1 is an open-weight language model (Mixture-of-Experts) released by poolside with 118 billion total parameters, of which only about 8 billion are activated per token. It is designed for agentic coding and long-horizon tasks, supports a context window of up to 1 million tokens, and is distributed under the open OpenMDW-1.1 license. The model was announced on July 21, 2026, and is available via Hugging Face, Poolside's API, and OpenRouter, among others.
Momentum trend
24.04.23.07.
Features
| Key Benchmark (%) | 40.4% on DeepSWE; 70.2% on Terminal-Bench 2.1 |
| Context Window (Tokens) | up to 1,048,576 tokens (1M) |
| License | OpenMDW-1.1 (open, free to use) |
| Multimodality | Text only (no multimodality reported) |
| Platform | Hugging Face, Poolside API, OpenRouter, Baseten, Vercel AI Gateway; local via vLLM, SGLang, Ollama, GGUF/MLX |
| Price per 1M Tokens | $0.10 input / $0.20 output per 1M tokens (free endpoint also available) |
| Release Date | July 21, 2026 |