AI model comparison
GPT-6 Luna vs Grok 4.7
Side by side comparison of GPT-6 Luna and Grok 4.7 on pricing, benchmark scores, context window, and more.
GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol.
- Input / 1M
- $0.10
- Output / 1M
- $0.50
- Context
- 1.05M
Grok 4.7 is SpaceXAI's flagship model for coding, agentic tasks, and knowledge work, succeeding Grok 4.6.
- Input / 1M
- $2
- Output / 1M
- $6
- Context
- 500K
Comparing image generators? Compare image models
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
GPT-6 Luna
15.6x cheaper for a typical chat
Higher intelligence score
Grok 4.7
35 vs 27.8 on Artificial Analysis
Larger context window
GPT-6 Luna
1.05M vs 500K tokens
Newer release
GPT-6 Luna
Released September 22, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
GPT-6 Luna27.8Coding index
GPT-6 LunaNot availableAgentic index
GPT-6 LunaNot availablePricing
GPT-6 Luna vs Grok 4.7 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-6 Luna | |
|---|---|---|
| Input tokensPer 1M tokens | $0.10 | $2 |
| Output tokensPer 1M tokens | $0.50 | $6 |
| Cached input (read)Per 1M tokens | $0.01 | $0.50 |
| Cache writePer 1M tokens | $0.13 | Not available |
| Long-context pricingPer 1M tokens, for very long prompts | $0.20 in / $0.75 out above 272K | $4 in / $12 out above 200K |
| Web searchPer request | $0.01 | $0.005 |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
GPT-6 Luna$0.45Coding task
30K in, 4K out
GPT-6 Luna$5$2.30 cachedLong document summary
150K in, 2K out
GPT-6 Luna$16$2.50 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | GPT-6 Luna | |
|---|---|---|
| Context window | 1.05M tokens | 500K tokens |
| Max output | 128K tokens | 450K tokens |
| Input types | File, Image, Text | File, Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, None | Extra high, High, Medium, Low |
| Default reasoning effort | Medium | High |
| Release date | September 22, 2026 | September 21, 2026 |
Features
Supported features
API features available for each model.
| Metric | GPT-6 Luna | |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Not supported | Supported |
| Stop sequences | Not supported | Not supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
GPT-6 LunaView full model details- GPT-6 Luna vs DeepSeek V4.1 Flash 1017
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- GPT-6 Luna vs Claude Opus 5.5
- GPT-6 Luna vs Step 5 Preview
- GPT-6 Luna vs GLM 5.3
- GPT-6 Luna vs MiMo-V2.6-Flash
- GPT-6 Luna vs DeepSeek V4 Flash 0731
- GPT-6 Luna vs GPT-6.1 Sol
- GPT-6 Luna vs MiniMax M3.1 Flash
- GPT-6 Luna vs Hy3
- GPT-6 Luna vs Claude Haiku 5.5
- GPT-6 Luna vs DeepSeek V4 Flash 0423
- GPT-6 Luna vs GPT-6 Astra
- GPT-6 Luna vs Muse Spark 1.3 Contributor
- GPT-6 Luna vs Claude Sonnet 5.5
- GPT-6 Luna vs GPT-5.6 Luna
- GPT-6 Luna vs GPT-6.1 Terra
- GPT-6 Luna vs Gemini 4 Argon
- GPT-6 Luna vs Gemini 3.8 Flash
- GPT-6 Luna vs MiMo-V2.6-Pro
- GPT-6 Luna vs Solar Mini 4
- GPT-6 Luna vs Muse Spark 1.3
- GPT-6 Luna vs MiniMax M3
- GPT-6 Luna vs Qwen3.8 Max (0902)
- GPT-6 Luna vs DeepSeek V4 Pro 0813
- GPT-6 Luna vs Qwen3.8 Flash
- GPT-6 Luna vs Solar Pro 4
- GPT-6 Luna vs Mistral Large 4
- GPT-6 Luna vs DeepSeek V4 Pro 0423
- GPT-6 Luna vs Qwen3.8 27B
- GPT-6 Luna vs GPT-6 Luna Pro
- GPT-6 Luna vs Nemotron 3.5 Super VL
- GPT-6 Luna vs Gemma 4 31B
- GPT-6 Luna vs Qwen3.7 Flash
- GPT-6 Luna vs gpt-oss-120b
- GPT-6 Luna vs Gemma 4 26B A4B
- GPT-6 Luna vs Step 3.7 Flash
- GPT-6 Luna vs Gemini 2.5 Flash Lite
- GPT-6 Luna vs DeepSeek V3.2
- GPT-6 Luna vs gpt-oss-20b
- GPT-6 Luna vs GPT-4o-mini
- GPT-6 Luna vs GLM 5.3 FlashX
- GPT-6 Luna vs Qwen3.6 35B A3B
- GPT-6 Luna vs GPT-5.6 Luna Pro
- GPT-6 Luna vs Ling 3.1 Flash
- Grok 4.7 vs Claude Opus 5.5
- Grok 4.7 vs GPT-6 Astra
- Grok 4.7 vs Muse Spark 1.3
- Grok 4.7 vs Claude Haiku 5.5
- Grok 4.7 vs Qwen3.8 Max (0902)
- Grok 4.7 vs GLM 5.3
- Grok 4.7 vs Gemini 3.8 Flash
- Grok 4.7 vs MiMo-V2.6-Pro
- Grok 4.7 vs Step 5 Preview
- Grok 4.7 vs Hy4 preview
- Grok 4.7 vs GLM 5.2
- Grok 4.7 vs Claude Haiku 4.5
- Grok 4.7 vs Grok 4.6
Our take
GPT-6 Luna is 15.6x cheaper for a typical chat. Grok 4.7 scores higher on the Artificial Analysis Intelligence Index (35 vs 27.8). GPT-6 Luna has the larger context window (1.05M vs 500K tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is GPT-6 Luna or Grok 4.7 cheaper?
GPT-6 Luna is cheaper for a typical chat (2K input tokens and 500 output tokens). GPT-6 Luna costs $0.10 per 1M input tokens and $0.50 per 1M output tokens, while Grok 4.7 costs $2 per 1M input tokens and $6 per 1M output tokens.
Which has a bigger context window, GPT-6 Luna or Grok 4.7?
GPT-6 Luna supports up to 1.05M tokens of context, compared with 500K for Grok 4.7.
Is GPT-6 Luna smarter than Grok 4.7?
On the Artificial Analysis Intelligence Index, GPT-6 Luna scores 27.8 and Grok 4.7 scores 35, putting Grok 4.7 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use GPT-6 Luna and Grok 4.7 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GPT-6 Luna and Grok 4.7 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GPT-6 Luna and Grok 4.7 at the same time. Compare the answers side by side and keep the best one.