Model Comparison
GPT-5.6 Luna (xhigh)
vs. Grok 4.6 (high)
Comparing 2 AI models · 4 benchmarks · OpenAI, SpaceXAI
Recommended Pick
SpGrok 4.6 (high)7 metric winsStrongest on: Reasoning, Intelligence, Coding
Best Value
GPT-5.6 Luna (xhigh)
100.0 value score
58.9 reasoning / $0.45/1M
Lowest Price
GPT-5.6 Luna (xhigh)
$0.20/1M input price
Best Reasoning
Grok 4.6 (high)
66.2 reasoning score
Blends available reasoning benchmarks
Best for Coding
Grok 4.6 (high)
76.8 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-5.6 Luna (xhigh) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
GPT-5.6 Luna (xhigh) is 10x cheaper on input tokens than Grok 4.6 (high).
Speed gap
GPT-5.6 Luna (xhigh) generates about 2.7x as many tokens per second as Grok 4.6 (high).
Reasoning gap
Grok 4.6 (high) leads GPT-5.6 Luna (xhigh) by 7.4 points on reasoning.
Coding gap
Grok 4.6 (high) leads GPT-5.6 Luna (xhigh) by 8.2 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-5.6 Luna (xhigh)
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Grok 4.6 (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 GPT-5.6 Luna (xhigh) | Top Pick Sp Grok 4.6 (high) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.20/1M | $2.00/1M |
| Output Cost | $1.20/1M | $6.00/1M |
| Blended (3:1) | $0.45/1M | $3.00/1M |
| Specifications | ||
| Organization | OpenAI | SpaceXAI |
| Release Date | Jul 9, 2026 | Aug 12, 2026 |
| Performance & Speed | ||
| Throughput | 145.1 tok/s | 53.6 tok/s |
| TTFT | 44818ms | 45246ms |
| Latency | 44818ms | 45246ms |
| Composite Indices | ||
| Value Score | 100.0 | 16.9 |
| Reasoning Score | 58.9 | 66.2 |
| Intelligence | 50.1 | 60.9 |
| Coding | 68.6 | 76.8 |
| Standard Benchmarks | ||
| GPQA | 89.5% | 94.9% |
| HLE | 37.0% | 42.9% |
| SciCode | 50.0% | 53.6% |
| LCR | 73.3% | 75.0% |
Key Takeaways
GPT-5.6 Luna (xhigh) offers the best value at $0.20/1M,making it ideal for high-volume applications and cost-conscious projects.
Grok 4.6 (high) has the strongest reasoning profile with a 66.2 reasoning score,combining the available reasoning-heavy benchmarks.
Grok 4.6 (high) reaches a 76.8 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-5.6 Luna (xhigh)
- Cost-sensitive applications
- High-volume processing
Grok 4.6 (high)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
