Estimated spend for typical coding and autonomous agent workloads based on published per-token rates:
Claude Opus 5.5 · 10M In + 2M Out$8.00Gemini 3.8 Flash High · 10M In + 2M Out—Billing ModelPrepaid · $0 Hard Stop
When to Route to Claude Opus 5.5 vs Gemini 3.8 Flash High
Because Newton’s exposes both claude-opus-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:
Primary Planning & ArchitectureClaude Opus 5.5 (claude-opus-5-5)
High-Volume Execution & VerificationGemini 3.8 Flash High (gemini-3.8-flash-high)