Freesolo

Freesolo Flash is an agent-native post-training platform that lets AI engineers fine-tune small language models (SLMs) using their existing coding agents (Claude Code, Cursor, Codex). Instead of metered GPU-hour billing, Flash provides a single fixed-price quote for each training run, owns the model weights for the customer, and guarantees a deployable model with faster turnaround and significant cost savings over frontier model inference. The platform optimizes training throughput via custom CUDA kernels and positions itself as a developer tool for the long tail of routine inference tasks where SLMs can beat frontier models in latency, cost, and accuracy.