Today’s uploads on HuggingFace are led by a new Qwen3.5-based vision-language model and several robotics / fine-tuning checkpoints:

OpenRouter: New Models

  • Sakana: Fugu Ultra (sakana/fugu-ultra) — A brand-new model from Sakana AI featuring a massive 1M token context window. Pricing: $5/M prompt tokens. Sakana continues to explore biologically-inspired, sparse architectures for long-context inference.
  • Forsy-AI/agent-apprenticeship — An ecosystem where AI agents learn from real-world work through iterative workflow loops. Now at 928★, the top trending repo today in the agent training space.
  • sums001/Windows-Copilot-API — Reverse-engineered Windows Copilot into an OpenAI-compatible API, providing access to GPT-4 and GPT-5 models. 727★, Python. Rapid star growth (+50 since earlier today) signals huge demand for alternative API access to Microsoft’s frontier models.
  • raiyanyahya/recall — Gives Claude Code durable project memory, eliminating re-explanations every session. 528★, Python. A practical fix for one of the most frustrating issues in agentic coding workflows.
  • yo-WASSUP/Good-Badminton — AI-powered badminton Hawk-Eye system using computer vision for line-call accuracy. 513★, Python. Sports analytics continues to drive open-source innovation.
  • benchflow-ai/awesome-evals — A curated library of the best resources for building and evaluating AI agents: papers, blog posts, and benchmarks. 250★. Essential for anyone working on agent evaluation.

Limited-Time Free Models on OpenRouter

The following two models are still free on OpenRouter, expiring soon:

  • Anthropic: Claude Opus 4.6 (Fast) — 1M context window. Free until 2026-06-29 (2 days left). Standard pricing: $30/M prompt, $150/M completion tokens.
  • StepFun: Step 3.5 Flash — 262K context window. Free until 2026-06-29 (2 days left). Standard pricing: ~$0.09/M prompt, ~$0.30/M completion tokens.

That’s all for today’s AI news roundup — 18 items total across HuggingFace, GitHub, and OpenRouter.