Grok 4.7 vs GPT-6 Luna
Grok 4.7 is from SpaceXAI, released September 21, 2026. GPT-6 Luna is from OpenAI, released September 22, 2026.
- LMArena Elo1443 vs 1443. Both rated 1443 on LMArena.
- Input per 1M$2 vs $0.10. GPT-6 Luna costs 95% less per million input tokens.
- Output per 1M$6 vs $0.50. GPT-6 Luna costs 92% less per million output tokens.
- Context window500k vs 1.05M. GPT-6 Luna takes 110% more context in one request.
Prices are the vendors’ published API rates; Elo is LMArena’s text board. Each figure is dated on its model page.
Interactive Comparison
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$2 / $6 per million tokens | $0.10 / $0.50 per million tokens | |
|---|---|---|
| Identity | ||
| Developer | SpaceXAI | OpenAI |
| Released | Sep 2026 | Sep 2026 |
| Status | GA | GA |
| Licence | Proprietary | Proprietary |
| Self-hostable | No | No |
| Cost | ||
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $3.000 / 1M tokens | $0.200 / 1M tokens |
| Input price | $2.000 / 1M tokens | $0.100 / 1M tokens |
| Output price | $6.000 / 1M tokens | $0.500 / 1M tokens |
| Cached input | — | $0.01 per 1M tokens |
| Batch discount | — | 50% (Batch and Flex) |
| Capacity | ||
| Context window | 500k tokens | 1,050,000 tokens |
| Max output | No text output limit | 128k tokens |
| Long-context surcharge | — | Prompts over 272K input tokens: 2x input and cache rates, 1.5x output |
| Capability | ||
| Vision in | Yes | Yes |
| Audio in | No | No |
| Function calling | Yes | Yes |
| Structured output | Yes | Yes |
| Extended reasoning | Yes | Yes |
| Web search | Yes | Yes |
| Code execution | Yes | Yes |
| Access | ||
| API | Yes | Yes |
| Chat app | Yes | Yes |
| Cloud marketplaces | Google Cloud Vertex AI, Microsoft Foundry | — |
| Fine-tuning | No | No |
| Measured quality | ||
| LMArena Elo | 1443 (checked Oct 2026) | 1443 (checked Oct 2026) |
| LMArena rank | Rank 90 | Rank 91 |
| GPQA Diamond | 93 · xhigh effort | 90 · max effort |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 481 | 7215 |
