We fine-tuned a 4B model on synthetic browser trajectories and benchmarked it against frontier APIs. The local model costs $0 per call and matches the cheap API tier statistically. The real lesson is not which model wins. It is that routing beats picking. Full article:…

This is the second post in our Architect-Editor series. The first one showed how we cut AI agent costs by 55% using a hybrid cloud and local model pipeline. This one goes under the hood and shows exactly how we configured it. Inside, you will find the full step-by-step…

Your batch jobs are running on real-time pricing. One suffix change that. openai/gpt-5.4-nano → openai/gpt-5.4-nano:flex Same model. Same quality. ~50% cheaper. docs.fastrouter.ai/explore-f…

You're paying for the same tokens on every request. The same system prompt. The same knowledge base. Every call, full price. Prompt Caching on FastRouter fixes this automatically. For most providers — OpenAI, DeepSeek, Gemini — zero code changes. Cache hits come back at…

Microsoft canceled Claude Code licenses because token costs were untenable. Uber burned its entire 2026 AI budget in four months. This week, we shipped something relevant: Claude Code now works with any model on FastRouter. Route it through DeepSeek, Gemini, Grok, OpenAI,…