Model Comparison
GPT-5.2 (xhigh)
vs. Grok 4.20 0309 (Reasoning)
Comparing 2 AI models · 10 benchmarks · OpenAI, xAI
Recommended Pick
Op GPT-5.2 (xhigh) 9 metric wins Strongest on: Input price, Reasoning, Intelligence
Best Value
Grok 4.20 0309 (Reasoning)
100.0 value score
55.7 reasoning / $3.00/1M
Lowest Price
GPT-5.2 (xhigh)
$1.75/1M input price
Best Reasoning
GPT-5.2 (xhigh)
75.0 reasoning score
Blends available reasoning benchmarks
Best for Coding
GPT-5.2 (xhigh)
48.7 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
Grok 4.20 0309 (Reasoning) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
GPT-5.2 (xhigh) is 1.1x cheaper on input tokens than Grok 4.20 0309 (Reasoning).
Speed gap
Grok 4.20 0309 (Reasoning) generates about 2.2x as many tokens per second as GPT-5.2 (xhigh).
Reasoning gap
GPT-5.2 (xhigh) leads Grok 4.20 0309 (Reasoning) by 19.3 points on reasoning.
Coding gap
GPT-5.2 (xhigh) leads Grok 4.20 0309 (Reasoning) by 6.5 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-5.2 (xhigh)
OpenAI
TTFT
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Time
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tok/s
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Tokens
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Cost
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Grok 4.20 0309 (Reasoning)
xAI
TTFT
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Time
—
tok/s
—
Tokens
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Cost
—
Which answer was more useful?
Full Comparison
| Metric | Top Pick Op GPT-5.2 (xhigh) | xA Grok 4.20 0309 (Reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.75/1M | $2.00/1M |
| Output Cost | $14.00/1M | $6.00/1M |
| Blended (3:1) | $4.81/1M | $3.00/1M |
| Specifications | ||
| Organization | OpenAI | xAI |
| Release Date | Dec 11, 2025 | Mar 10, 2026 |
| Performance & Speed | ||
| Throughput | 80.6 tok/s | 175.2 tok/s |
| TTFT | 115688ms | 13254ms |
| Latency | 115688ms | 13254ms |
| Composite Indices | ||
| Value Score | 84.0 | 100.0 |
| Reasoning Score | 75.0 | 55.7 |
| Intelligence | 51.3 | 48.5 |
| Coding | 48.7 | 42.2 |
| Math | 99.0 | — |
| Standard Benchmarks | ||
| GPQA | 90.3% | 88.5% |
| MMLU Pro | 87.4% | — |
| HLE | 35.4% | 30.0% |
| LiveCodeBench | 88.9% | — |
| AIME 2025 | 99.0% | — |
| SciCode | 52.1% | 44.7% |
| LCR | 72.7% | 59.0% |
| IFBench | 75.4% | 82.9% |
| TAU-bench v2 | 84.8% | 96.5% |
| TerminalBench Hard | 47.0% | 40.9% |
Key Takeaways
GPT-5.2 (xhigh) offers the best value at $1.75/1M, making it ideal for high-volume applications and cost-conscious projects.
GPT-5.2 (xhigh) has the strongest reasoning profile with a 75.0 reasoning score, combining the available reasoning-heavy benchmarks.
GPT-5.2 (xhigh) reaches a 48.7 coding index, making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
GPT-5.2 (xhigh)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
Grok 4.20 0309 (Reasoning)
- General-purpose AI
- Versatile applications
