Model Comparison
o4-mini (high)
vs. Grok 4.5 (high)
Comparing 2 AI models · 12 benchmarks · OpenAI, SpaceXAI
Recommended Pick
SpGrok 4.5 (high)7 metric winsStrongest on: TTFT, Latency, Intelligence
Best Value
o4-mini (high)
100.0 value score
70.8 reasoning / $1.93/1M
Lowest Price
o4-mini (high)
$1.10/1M input price
Best Reasoning
o4-mini (high)
70.8 reasoning score
Blends available reasoning benchmarks
Best for Coding
Grok 4.5 (high)
72.4 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
o4-mini (high) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
o4-mini (high) is 1.8x cheaper on input tokens than Grok 4.5 (high).
Speed gap
o4-mini (high) generates about 1.6x as many tokens per second as Grok 4.5 (high).
Reasoning gap
o4-mini (high) leads Grok 4.5 (high) by 8.4 points on reasoning.
Top-pick rationale
Grok 4.5 (high) wins 7 measurable categories, including TTFT, Latency, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
o4-mini (high)
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Grok 4.5 (high)
SpaceXAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Chat with leading AI models
Use Claude, ChatGPT, Gemini alongside with EU-Hosted Models like Deepseek, Qwen & Kimi.
EU-hosted inference
Servers in Germany & Finland. Designed to meet strict GDPR and ISO 27001 compliance requirements.
Full Comparison
| Metric | Op o4-mini (high) | Top Pick Sp Grok 4.5 (high) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.10/1M | $2.00/1M |
| Output Cost | $4.40/1M | $6.00/1M |
| Blended (3:1) | $1.93/1M | $3.00/1M |
| Specifications | ||
| Organization | OpenAI | SpaceXAI |
| Release Date | Apr 16, 2025 | Jul 8, 2026 |
| Performance & Speed | ||
| Throughput | 187.8 tok/s | 116.8 tok/s |
| TTFT | 20814ms | 14061ms |
| Latency | 20814ms | 14061ms |
| Composite Indices | ||
| Value Score | 100.0 | 56.5 |
| Reasoning Score | 70.8 | 62.4 |
| Intelligence | 25.6 | 53.8 |
| Coding | — | 72.4 |
| Math | 90.7 | — |
| Standard Benchmarks | ||
| GPQA | 78.4% | 93.1% |
| MMLU Pro | 83.2% | — |
| HLE | 17.5% | 40.3% |
| LiveCodeBench | 85.9% | — |
| MATH 500 | 98.9% | — |
| AIME 2025 | 90.7% | — |
| AIME (Original) | 94.0% | — |
| SciCode | 46.5% | 54.1% |
| LCR | 55.0% | 67.7% |
| IFBench | 68.7% | — |
| TAU-bench v2 | 55.6% | — |
| TerminalBench Hard | 15.2% | — |
Key Takeaways
o4-mini (high) offers the best value at $1.10/1M,making it ideal for high-volume applications and cost-conscious projects.
o4-mini (high) has the strongest reasoning profile with a 70.8 reasoning score,combining the available reasoning-heavy benchmarks.
Grok 4.5 (high) reaches a 72.4 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
o4-mini (high)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
Grok 4.5 (high)
- Code generation
- Software development
