Model Comparison
GPT-5 (minimal)
vs. Grok 4.3 (high)
Comparing 2 AI models · 12 benchmarks · OpenAI, xAI
Recommended Pick
xA Grok 4.3 (high) 14 metric wins Strongest on: Value, Output price, Blended price
Best Value
Grok 4.3 (high)
100.0 value score
59.4 reasoning / $1.56/1M
Lowest Price
GPT-5 (minimal)
$1.25/1M input price
Best Reasoning
Grok 4.3 (high)
59.4 reasoning score
Blends available reasoning benchmarks
Best for Coding
Grok 4.3 (high)
41.0 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 4.3 (high) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Speed gap
Grok 4.3 (high) generates about 1.9x as many tokens per second as GPT-5 (minimal).
Reasoning gap
Grok 4.3 (high) leads GPT-5 (minimal) by 19.0 points on reasoning.
Coding gap
Grok 4.3 (high) leads GPT-5 (minimal) by 16.0 points on coding.
Top-pick rationale
Grok 4.3 (high) wins 14 measurable categories, including Value, Output price, Blended price, Throughput.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-5 (minimal)
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Grok 4.3 (high)
xAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | Op GPT-5 (minimal) | Top Pick xA Grok 4.3 (high) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.25/1M | $1.25/1M |
| Output Cost | $10.00/1M | $2.50/1M |
| Blended (3:1) | $3.44/1M | $1.56/1M |
| Specifications | ||
| Organization | OpenAI | xAI |
| Release Date | Aug 7, 2025 | Apr 30, 2026 |
| Performance & Speed | ||
| Throughput | 90.3 tok/s | 171.3 tok/s |
| TTFT | 907ms | 20424ms |
| Latency | 907ms | 20424ms |
| Composite Indices | ||
| Value Score | 30.9 | 100.0 |
| Reasoning Score | 40.4 | 59.4 |
| Intelligence | 23.9 | 53.2 |
| Coding | 25.0 | 41.0 |
| Math | 31.7 | — |
| Standard Benchmarks | ||
| GPQA | 67.3% | 90.1% |
| MMLU Pro | 80.6% | — |
| HLE | 5.4% | 35.0% |
| LiveCodeBench | 55.8% | — |
| MATH 500 | 86.1% | — |
| AIME 2025 | 31.7% | — |
| AIME (Original) | 36.7% | — |
| SciCode | 38.8% | 47.3% |
| LCR | 25.0% | 64.3% |
| IFBench | 45.6% | 81.3% |
| TAU-bench v2 | 67.0% | 97.7% |
| TerminalBench Hard | 18.2% | 37.9% |
Key Takeaways
GPT-5 (minimal) offers the best value at $1.25/1M, making it ideal for high-volume applications and cost-conscious projects.
Grok 4.3 (high) has the strongest reasoning profile with a 59.4 reasoning score, combining the available reasoning-heavy benchmarks.
Grok 4.3 (high) reaches a 41.0 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 (minimal)
- Cost-sensitive applications
- High-volume processing
Grok 4.3 (high)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
