Model Comparison
GPT-5 (high)
vs. Grok 3
Comparing 2 AI models · 12 benchmarks · OpenAI, SpaceXAI
Recommended Pick
OpGPT-5 (high)20 metric winsStrongest on: Value, Input price, Output price
Best Value
GPT-5 (high)
100.0 value score
75.8 reasoning / $3.44/1M
Lowest Price
GPT-5 (high)
$1.25/1M input price
Best Reasoning
GPT-5 (high)
75.8 reasoning score
Blends available reasoning benchmarks
Best for Coding
GPT-5 (high)
37.8 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
GPT-5 (high) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
GPT-5 (high) is 3.2x cheaper on input tokens than Grok 3.
Reasoning gap
GPT-5 (high) leads Grok 3 by 28.8 points on reasoning.
Top-pick rationale
GPT-5 (high) wins 20 measurable categories, including Value, Input price, Output price, Blended price.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-5 (high)
OpenAI
TTFT
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Time
—
tok/s
—
Tokens
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Cost
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Grok 3
SpaceXAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
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Which answer was more useful?
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Full Comparison
| Metric | Top Pick Op GPT-5 (high) | Sp Grok 3 |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.25/1M | $4.00/1M |
| Output Cost | $10.00/1M | $20.00/1M |
| Blended (3:1) | $3.44/1M | $8.00/1M |
| Specifications | ||
| Organization | OpenAI | SpaceXAI |
| Release Date | Aug 7, 2025 | Feb 19, 2025 |
| Performance & Speed | ||
| Throughput | 112.4 tok/s | — |
| TTFT | 81675ms | — |
| Latency | 81675ms | — |
| Composite Indices | ||
| Value Score | 100.0 | 26.6 |
| Reasoning Score | 75.8 | 47.0 |
| Intelligence | 34.7 | 18.4 |
| Coding | 37.8 | — |
| Math | 94.3 | 58.0 |
| Standard Benchmarks | ||
| GPQA | 85.4% | 69.3% |
| MMLU Pro | 87.1% | 79.9% |
| HLE | 26.5% | 5.1% |
| LiveCodeBench | 84.6% | 42.5% |
| MATH 500 | 99.4% | 87.0% |
| AIME 2025 | 94.3% | 58.0% |
| AIME (Original) | 95.7% | 33.0% |
| SciCode | 42.9% | 36.8% |
| LCR | 75.6% | 54.7% |
| IFBench | 73.1% | 46.9% |
| TAU-bench v2 | 84.8% | 48.8% |
| TerminalBench Hard | 32.6% | 11.4% |
Key Takeaways
GPT-5 (high) offers the best value at $1.25/1M,making it ideal for high-volume applications and cost-conscious projects.
GPT-5 (high) has the strongest reasoning profile with a 75.8 reasoning score,combining the available reasoning-heavy benchmarks.
GPT-5 (high) reaches a 37.8 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 (high)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
Grok 3
- General-purpose AI
- Versatile applications
