GPT-4 vs Grok 4.5
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for GPT-4 and Grok 4.5.
GPT-4
OpenAI's flagship model, GPT-4 is a large-scale multimodal language model capable of solving difficult problems with greater accuracy than previous models due to its broader general knowledge and advanced reasoning...
Grok 4.5
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Technical Specifications
| Specification | GPT-4 | Grok 4.5 |
|---|---|---|
| Provider | OpenAI | xAI |
| Context Window | 8,191 tokens | 500,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2023-05-28 | 2026-07-08 |
API Pricing Comparison
Input Price per Million Tokens
GPT-4
$30.00
Grok 4.5
$2.00
Output Price per Million Tokens
GPT-4
$60.00
Grok 4.5
$6.00
Want to test both models live?
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
GPT-4 Quirks & Gotchas
No developer gotchas reported.
Grok 4.5 Quirks & Gotchas
No developer gotchas reported.