Estimated spend for typical coding and autonomous agent workloads based on published per-token rates:
Claude Fable 5 · 10M In + 2M Out—Gemini 3.8 Flash High · 10M In + 2M Out—Billing ModelPrepaid · $0 Hard Stop
When to Route to Claude Fable 5 vs Gemini 3.8 Flash High
Because Newton’s exposes both claude-fable-5-1 and gemini-3.8-flash-high behind the same API key and base URL, engineering teams frequently combine both models in the same workflow: