GPT-4 Turbo Preview 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 Turbo Preview and Grok 4.5.
GPT-4 Turbo Preview
The preview GPT-4 model with improved instruction following, JSON mode, reproducible outputs, parallel function calling, and more. Training data: up to Dec 2023. **Note:** heavily rate limited by OpenAI while...
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 Turbo Preview | Grok 4.5 |
|---|---|---|
| Provider | OpenAI | xAI |
| Context Window | 128,000 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 | 2024-01-25 | 2026-07-08 |
API Pricing Comparison
Input Price per Million Tokens
GPT-4 Turbo Preview
$10.00
Grok 4.5
$2.00
Output Price per Million Tokens
GPT-4 Turbo Preview
$30.00
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 Turbo Preview Quirks & Gotchas
No developer gotchas reported.
Grok 4.5 Quirks & Gotchas
No developer gotchas reported.