Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Grok 4.20
o1 Pro
Cost Differences
o1 Pro costs more than Grok 4.20
Feature Comparison
| Feature | Grok 4.20 | o1 Pro |
|---|---|---|
| Provider | xAI | OpenAI |
| Input Price | $2.00/1M tokens | $150.00/1M tokens |
| Output Price | $6.00/1M tokens | $600.00/1M tokens |
| Context Window | 2,000,000 tokens | 200,000 tokens |
| Max Output | 131,072 tokens | 100,000 tokens |
| Category | reasoning | flagship |
| Capabilities | textvisionreasoningcode | textvisioncodereasoning |
| Release Date | 2/17/2026 | 12/17/2024 |
Grok 4.20 vs o1 Pro: Which Should You Choose?
Choosing between Grok 4.20 and o1 Pro depends on your priorities: cost efficiency, context length, or raw capability. Grok 4.20 is the more affordable option at $2.00/1M input tokens — 99% cheaper than o1 Pro. Meanwhile, Grok 4.20 offers a significantly larger context window at 2,000,000 tokens vs 200,000 for o1 Pro.
These models come from different providers — xAI and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with xAI, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Grok 4.20 is a reasoning model while o1 Pro is flagship. This means they're optimized for different workloads. Grok 4.20 is built for complex tasks that require deeper reasoning, while o1 Pro offers better value for routine operations.
Output costs matter too. Grok 4.20 charges $6.00/1M output tokens vs $600.00 for o1 Pro. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Grok 4.20 has the edge here at $6.00/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Grok 4.20 when:
- • Budget is a primary concern
- • You need a larger context window (2,000,000 tokens)
- • You need longer outputs (up to 131,072 tokens)
- • You're already using xAI's API ecosystem
Choose o1 Pro when:
- • You're already using OpenAI's API ecosystem
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Grok 4.20 (xAI)
o1 Pro (OpenAI)
Start using Grok 4.20 today
Sign Up for xAI →Start using o1 Pro today
Sign Up for OpenAI →