Estimated spend for typical coding and autonomous agent workloads based on published per-token rates:
Claude Opus 4.5 (20251101) · 10M In + 2M Out—GPT-6.1 Sol · 10M In + 2M Out—Billing ModelPrepaid · $0 Hard Stop
When to Route to Claude Opus 4.5 (20251101) vs GPT-6.1 Sol
Because Newton’s exposes both claude-opus-4-5-20251101 and gpt-6.1-sol behind the same API key and base URL, engineering teams frequently combine both models in the same workflow:
Primary Planning & ArchitectureClaude Opus 4.5 (20251101) (claude-opus-4-5-20251101)
High-Volume Execution & VerificationGPT-6.1 Sol (gpt-6.1-sol)