Grok 4.5 vs o3 Deep Research
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 Grok 4.5 and o3 Deep Research.
Grok 4.5
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
o3 Deep Research
o3-deep-research is OpenAI's advanced model for deep research, designed to tackle complex, multi-step research tasks. Note: This model always uses the 'web_search' tool which adds additional cost.
Technical Specifications
| Specification | Grok 4.5 | o3 Deep Research |
|---|---|---|
| Provider | xAI | OpenAI |
| Context Window | 500,000 tokens | 200,000 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 | 2026-07-08 | 2025-10-10 |
API Pricing Comparison
Input Price per Million Tokens
Grok 4.5
$2.00
o3 Deep Research
$10.00
Output Price per Million Tokens
Grok 4.5
$6.00
o3 Deep Research
$40.00
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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.
Grok 4.5 Quirks & Gotchas
No developer gotchas reported.
o3 Deep Research Quirks & Gotchas
No developer gotchas reported.