Estimated spend for typical coding and autonomous agent workloads based on published per-token rates:
Claude Sonnet 5.5 · 10M In + 2M Out$4.00Gemini 3.8 Flash High · 10M In + 2M Out—Billing ModelPrepaid · $0 Hard Stop
When to Route to Claude Sonnet 5.5 vs Gemini 3.8 Flash High
Because Newton’s exposes both claude-sonnet-5-5 and gemini-3.8-flash-high behind the same API key and base URL, engineering teams frequently combine both models in the same workflow: