Grok 4.7 vs GPT-6 Astra
Grok 4.7 is from SpaceXSI, released September 21, 2026. GPT-6 Astra is from OpenAI, released September 3, 2026.
- LMArena Elo1441 vs 1476. GPT-6 Astra is 2.4% ahead on LMArena Elo.
- Input per 1M$2 vs $10. Grok 4.7 costs 80% less per million input tokens.
- Output per 1M$6 vs $50. Grok 4.7 costs 88% less per million output tokens.
- Context window500k vs 1.05M. GPT-6 Astra 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 | $10 / $50 per million tokens | |
|---|---|---|
| Identity | ||
| Developer | SpaceXSI | 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 | $20.000 / 1M tokens |
| Input price | $2.000 / 1M tokens | $10.000 / 1M tokens |
| Output price | $6.000 / 1M tokens | $50.000 / 1M tokens |
| Cached input | — | $1 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 | — | Yes - prompts over 272K input tokens are priced at 2x input and cache rates and 1.5x output for the full request |
| Capability | ||
| Vision in | Yes | Yes |
| Audio in | No | No |
| Function calling | Yes | — |
| Structured output | Yes | — |
| Extended reasoning | Yes | — |
| Web search | Yes | — |
| Code execution | Yes | — |
| Access | ||
| API | Yes | Yes |
| Chat app | Yes | Yes |
| Cloud marketplaces | Google Cloud Vertex AI, Microsoft Foundry | — |
| Fine-tuning | No | — |
| Measured quality | ||
| LMArena Elo | 1441 (checked Nov 2026) | 1476 (checked Nov 2026) |
| LMArena rank | Rank 96 | Rank 37 |
| GPQA Diamond | 93 · xhigh effort | 96 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 480 | 74 |
