Estimated spend for typical coding and autonomous agent workloads based on published per-token rates:
Grok 4.20 Multi Agent 0309 · 10M In + 2M Out—GPT-6.1 Sol · 10M In + 2M Out—Billing ModelPrepaid · $0 Hard Stop
When to Route to Grok 4.20 Multi Agent 0309 vs GPT-6.1 Sol
Because Newton’s exposes both grok-4.20-multi-agent-0309 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 & ArchitectureGrok 4.20 Multi Agent 0309 (grok-4.20-multi-agent-0309)
High-Volume Execution & VerificationGPT-6.1 Sol (gpt-6.1-sol)