tokevenGemini Robotics ER 2 vs Grok 4.20 Reasoning
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Gemini Robotics ER 2
Fast / BudgetGrok 4.20 Reasoning
Mid-tierQuality
Task confidence comparison
Guidance
When to use Gemini Robotics ER 2 vs Grok 4.20 Reasoning
Choose Gemini Robotics ER 2 when...
- -Cost matters: 20% cheaper on input tokens
Choose Grok 4.20 Reasoning when...
- -You need a larger context window (1,000K vs 131.072K)
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
FAQ
When should I use Gemini Robotics ER 2 instead of Grok 4.20 Reasoning?
Gemini Robotics ER 2 and Grok 4.20 Reasoning perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Grok 4.20 Reasoning cheaper than Gemini Robotics ER 2?
Grok 4.20 Reasoning input costs $1.25/MTok, which is 25% more than Gemini Robotics ER 2 at $1.00/MTok.
What are the context window sizes for Gemini Robotics ER 2 and Grok 4.20 Reasoning?
Gemini Robotics ER 2 has a 131.072K token context window. Grok 4.20 Reasoning has a 1,000K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Other comparisons
How Gemini Robotics ER 2 and Grok 4.20 Reasoning stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.