GPT-6 Sol vs GPT 5.6 Sol
GPT-6 Sol is from OpenAI, released September 22, 2026. GPT 5.6 Sol is from OpenAI, released July 9, 2026.
- LMArena Elo1456 vs 1484. GPT 5.6 Sol is 1.9% ahead on LMArena Elo.
- Input per 1M$2 vs $4. GPT-6 Sol costs 50% less per million input tokens.
- Output per 1M$10 vs $20. GPT-6 Sol costs 50% less per million output tokens.
- Context window1,050,000 vs 1.05M. Both hold 1,050,000 tokens of context.
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 / $10 per 1M tokens | $4 / $20 per 1M tokens | |
|---|---|---|
| Identity | ||
| Developer | OpenAI | OpenAI |
| Released | Sep 2026 | Jul 2026 |
| Status | GA | — |
| Licence | Proprietary | Proprietary |
| Self-hostable | No | No |
| Cost | ||
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $4.000 / 1M tokens | $8.000 / 1M tokens |
| Input price | $2.000 / 1M tokens | $4.000 / 1M tokens |
| Output price | $10.000 / 1M tokens | $20.000 / 1M tokens |
| Cached input | $0.20 per 1M tokens | 0.40 |
| Batch discount | 50% (Batch and Flex) | — |
| Capacity | ||
| Context window | 1,050,000 tokens | 1.05M tokens |
| Max output | 128k tokens | 128,000 tokens |
| Long-context surcharge | Prompts over 272K input tokens: 2x input and cache rates, 1.5x output | Prompts over 272K input tokens bill at 2x input and 1.5x output for the whole request |
| Capability | ||
| Vision in | Yes | — |
| Audio in | No | — |
| Function calling | Yes | — |
| Structured output | Yes | — |
| Extended reasoning | Yes | — |
| Web search | Yes | — |
| Code execution | Yes | — |
| Access | ||
| API | Yes | — |
| Chat app | Yes | — |
| Fine-tuning | No | — |
| Measured quality | ||
| LMArena Elo | 1456 (checked Oct 2026) | 1484 (checked Oct 2026) |
| LMArena rank | Rank 66 | Rank 20 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 364 | 186 |
