Model Comparison
Grok 4.3 (low)
vs. Grok Code Fast 1
Comparing 2 AI models · 10 benchmarks · xAI
Recommended Pick
xA Grok 4.3 (low) 10 metric wins Strongest on: Throughput, Reasoning, Intelligence
Lowest Price
Grok Code Fast 1
$0.00/1M input price
Best Reasoning
Grok 4.3 (low)
45.7 reasoning score
Blends available reasoning benchmarks
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Grok Code Fast 1 is ∞x cheaper on input tokens than Grok 4.3 (low).
Reasoning gap
Grok 4.3 (low) leads Grok Code Fast 1 by 8.0 points on reasoning.
Top-pick rationale
Grok 4.3 (low) wins 10 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Grok 4.3 (low)
xAI
TTFT
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Time
—
tok/s
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Tokens
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Cost
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Grok Code Fast 1
xAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | Top Pick xA Grok 4.3 (low) | xA Grok Code Fast 1 |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.25/1M | $0.00/1M |
| Output Cost | $2.50/1M | $0.00/1M |
| Blended (3:1) | $1.56/1M | — |
| Specifications | ||
| Organization | xAI | xAI |
| Release Date | Apr 30, 2026 | Aug 28, 2025 |
| Performance & Speed | ||
| Throughput | 145.6 tok/s | — |
| TTFT | 4986ms | — |
| Latency | 4986ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 45.7 | 37.7 |
| Intelligence | 35.4 | 21.6 |
| Math | — | 43.3 |
| Standard Benchmarks | ||
| GPQA | 84.3% | 72.7% |
| MMLU Pro | — | 79.3% |
| HLE | 17.3% | 7.5% |
| LiveCodeBench | — | 65.7% |
| AIME 2025 | — | 43.3% |
| SciCode | 41.9% | 36.2% |
| LCR | 64.0% | 48.3% |
| IFBench | 81.0% | 41.4% |
| TAU-bench v2 | 88.9% | 75.7% |
| TerminalBench Hard | 26.5% | 17.4% |
Key Takeaways
Grok Code Fast 1 offers the best value at $0.00/1M, making it ideal for high-volume applications and cost-conscious projects.
Grok 4.3 (low) has the strongest reasoning profile with a 45.7 reasoning score, combining the available reasoning-heavy benchmarks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Grok 4.3 (low)
- Complex reasoning tasks
- Research & analysis
Grok Code Fast 1
- Cost-sensitive applications
- High-volume processing
