Model Comparison
GPT-5.4 nano (Non-Reasoning)
vs. Grok 4.1 Fast (Non-reasoning)
Comparing 2 AI models · 10 benchmarks · OpenAI, xAI
Recommended Pick
xA Grok 4.1 Fast (Non-reasoning) 9 metric wins Strongest on: Input price, Output price, TTFT
Lowest Price
Grok 4.1 Fast (Non-reasoning)
$0.00/1M input price
Best Reasoning
Grok 4.1 Fast (Non-reasoning)
30.8 reasoning score
Blends available reasoning benchmarks
Best for Coding
GPT-5.4 nano (Non-Reasoning)
27.9 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Grok 4.1 Fast (Non-reasoning) is ∞x cheaper on input tokens than GPT-5.4 nano (Non-Reasoning).
Reasoning gap
Grok 4.1 Fast (Non-reasoning) leads GPT-5.4 nano (Non-Reasoning) by 5.0 points on reasoning.
Coding gap
GPT-5.4 nano (Non-Reasoning) leads Grok 4.1 Fast (Non-reasoning) by 8.4 points on coding.
Top-pick rationale
Grok 4.1 Fast (Non-reasoning) wins 9 measurable categories, including Input price, Output price, TTFT, Latency.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-5.4 nano (Non-Reasoning)
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Grok 4.1 Fast (Non-reasoning)
xAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | Op GPT-5.4 nano (Non-Reasoning) | Top Pick xA Grok 4.1 Fast (Non-reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.20/1M | $0.00/1M |
| Output Cost | $1.25/1M | $0.00/1M |
| Blended (3:1) | $0.46/1M | — |
| Specifications | ||
| Organization | OpenAI | xAI |
| Release Date | Mar 17, 2026 | Nov 19, 2025 |
| Performance & Speed | ||
| Throughput | 157.8 tok/s | — |
| TTFT | 555ms | — |
| Latency | 555ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 25.9 | 30.8 |
| Intelligence | 17.6 | 16.9 |
| Coding | 27.9 | 19.5 |
| Math | — | 34.3 |
| Standard Benchmarks | ||
| GPQA | 55.8% | 63.7% |
| MMLU Pro | — | 74.3% |
| HLE | 4.2% | 5.0% |
| LiveCodeBench | — | 39.9% |
| AIME 2025 | — | 34.3% |
| SciCode | 35.2% | 29.6% |
| LCR | 24.7% | 22.0% |
| IFBench | 32.7% | 36.5% |
| TAU-bench v2 | 34.8% | 63.7% |
| TerminalBench Hard | 24.2% | 14.4% |
Key Takeaways
Grok 4.1 Fast (Non-reasoning) offers the best value at $0.00/1M, making it ideal for high-volume applications and cost-conscious projects.
Grok 4.1 Fast (Non-reasoning) has the strongest reasoning profile with a 30.8 reasoning score, combining the available reasoning-heavy benchmarks.
GPT-5.4 nano (Non-Reasoning) reaches a 27.9 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-5.4 nano (Non-Reasoning)
- Code generation
- Software development
Grok 4.1 Fast (Non-reasoning)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
