GPT-5.4 Pro vs Grok 4.20
Compare OpenAI and xAI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
GPT-5.4 Pro
Grok 4.20
Cost Differences
Grok 4.20 costs less than GPT-5.4 Pro
Feature Comparison
| Feature | GPT-5.4 Pro | Grok 4.20 |
|---|---|---|
| Provider | OpenAI | xAI |
| Input Price | $30.00/1M tokens | $2.00/1M tokens |
| Output Price | $180.00/1M tokens | $6.00/1M tokens |
| Context Window | 1,050,000 tokens | 2,000,000 tokens |
| Max Output | 131,072 tokens | 131,072 tokens |
| Category | reasoning | reasoning |
| Capabilities | textvisioncodereasoning | textvisionreasoningcode |
| Release Date | 3/6/2026 | 2/17/2026 |
GPT-5.4 Pro vs Grok 4.20: Which Should You Choose?
Choosing between GPT-5.4 Pro and Grok 4.20 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 — 93% cheaper than GPT-5.4 Pro. Meanwhile, Grok 4.20 offers a significantly larger context window at 2,000,000 tokens vs 1,050,000 for GPT-5.4 Pro.
These models come from different providers — OpenAI and xAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with OpenAI, switching to xAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
Both models are in the reasoning category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: Grok 4.20 would save you roughly $34,500.00/month compared to GPT-5.4 Pro. For startups and indie developers, that difference can be significant.
Output costs matter too. GPT-5.4 Pro charges $180.00/1M output tokens vs $6.00 for Grok 4.20. 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 GPT-5.4 Pro when:
- • You're already using OpenAI's API ecosystem
Choose Grok 4.20 when:
- • Budget is a primary concern
- • You need a larger context window (2,000,000 tokens)
- • You're already using xAI's API ecosystem
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
GPT-5.4 Pro (OpenAI)
Grok 4.20 (xAI)
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