Estimated spend for typical coding and autonomous agent workloads based on published per-token rates:
Gemini 3.8 Flash High · 10M In + 2M Out—GPT-5.6 Terra · 10M In + 2M Out—Billing ModelPrepaid · $0 Hard Stop
When to Route to Gemini 3.8 Flash High vs GPT-5.6 Terra
Because Newton’s exposes both gemini-3.8-flash-high and gpt-5.6-terra behind the same API key and base URL, engineering teams frequently combine both models in the same workflow:
Primary Planning & ArchitectureGemini 3.8 Flash High (gemini-3.8-flash-high)
High-Volume Execution & VerificationGPT-5.6 Terra (gpt-5.6-terra)