CloudSurf Software builds Surfspace — the AI workspace that turns chats into apps from any device — and trains CloudSurf models: small, US-trained, open-weight models for function calling and agentic tool use, released under Apache-2.0.

Models

• CloudSurf-4B-FC — Gemma-4 E4B (4B active / ~8.0B total params) fine-tuned for function calling. BFCL V4 FULL, official harness, 3-seed mean: 55.73 vs 34.81 for the stock base — above the published small-model class bar (51.40). Self-run numbers with full settings disclosure; leaderboard submission open at gorilla PR #1357.

Evidence, not just claims

Every score we publish ships with the raw artifacts to check it:

• CloudSurf-4B-FC-bfcl-results — raw BFCL V4 result files for our runs and the stock baselines, with per-category scores.
• tau2-trajectories-cloudsurf-4b-fc — full τ²-bench evaluation trajectories backing our leaderboard submission, open at tau2-bench PR #480.

Model cards disclose both comparison frames, measured eval-noise bands, and known limitations.

Links

• Product: surf.space
• Company: cloudsurf.com