Model Comparison
Grok 3 mini Reasoning (high)
vs. GPT-5.5 (xhigh)
Comparing 2 AI models · 12 benchmarks · xAI, OpenAI
Recommended Pick
Op GPT-5.5 (xhigh) 10 metric wins Strongest on: Throughput, Intelligence, Coding
Best Value
Grok 3 mini Reasoning (high)
100.0 value score
69.2 reasoning / $0.35/1M
Lowest Price
Grok 3 mini Reasoning (high)
$0.30/1M input price
Best Reasoning
Grok 3 mini Reasoning (high)
69.2 reasoning score
Blends available reasoning benchmarks
Best for Coding
GPT-5.5 (xhigh)
59.1 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 3 mini Reasoning (high) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Grok 3 mini Reasoning (high) is 16.7x cheaper on input tokens than GPT-5.5 (xhigh).
Speed gap
GPT-5.5 (xhigh) generates about 1.3x as many tokens per second as Grok 3 mini Reasoning (high).
Reasoning gap
Grok 3 mini Reasoning (high) leads GPT-5.5 (xhigh) by 3.2 points on reasoning.
Coding gap
GPT-5.5 (xhigh) leads Grok 3 mini Reasoning (high) by 33.9 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Grok 3 mini Reasoning (high)
xAI
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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GPT-5.5 (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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Which answer was more useful?
Full Comparison
| Metric | xA Grok 3 mini Reasoning (high) | Top Pick Op GPT-5.5 (xhigh) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.30/1M | $5.00/1M |
| Output Cost | $0.50/1M | $30.00/1M |
| Blended (3:1) | $0.35/1M | $11.25/1M |
| Specifications | ||
| Organization | xAI | OpenAI |
| Release Date | Feb 19, 2025 | Apr 23, 2026 |
| Performance & Speed | ||
| Throughput | 55.8 tok/s | 70.7 tok/s |
| TTFT | 554ms | 43813ms |
| Latency | 36370ms | 43813ms |
| Composite Indices | ||
| Value Score | 100.0 | 3.0 |
| Reasoning Score | 69.2 | 66.0 |
| Intelligence | 32.1 | 60.2 |
| Coding | 25.2 | 59.1 |
| Math | 84.7 | — |
| Standard Benchmarks | ||
| GPQA | 79.1% | 93.5% |
| MMLU Pro | 82.8% | — |
| HLE | 11.1% | 44.3% |
| LiveCodeBench | 69.6% | — |
| MATH 500 | 99.2% | — |
| AIME 2025 | 84.7% | — |
| AIME (Original) | 93.3% | — |
| SciCode | 40.6% | 56.1% |
| LCR | 50.3% | 74.3% |
| IFBench | 45.9% | 75.9% |
| TAU-bench v2 | 90.4% | 93.9% |
| TerminalBench Hard | 17.4% | 60.6% |
Key Takeaways
Grok 3 mini Reasoning (high) offers the best value at $0.30/1M, making it ideal for high-volume applications and cost-conscious projects.
Grok 3 mini Reasoning (high) has the strongest reasoning profile with a 69.2 reasoning score, combining the available reasoning-heavy benchmarks.
GPT-5.5 (xhigh) reaches a 59.1 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
Grok 3 mini Reasoning (high)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
GPT-5.5 (xhigh)
- Code generation
- Software development
