GPT-5.2 Chat 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-5.2 Chat and Grok 4.5.
GPT-5.2 Chat
GPT-5.2 Chat (AKA Instant) is the fast, lightweight member of the 5.2 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on...
Grok 4.5
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
Technical Specifications
| Specification | GPT-5.2 Chat | 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 | 2025-12-10 | 2026-07-08 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5.2 Chat
$1.75
Grok 4.5
$2.00
Output Price per Million Tokens
GPT-5.2 Chat
$14.00
Grok 4.5
$6.00
Want to test both models live?
Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.
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-5.2 Chat Quirks & Gotchas
No developer gotchas reported.
Grok 4.5 Quirks & Gotchas
No developer gotchas reported.