GPT-6 Sol vs GPT-6 Luna
GPT-6 Sol is from OpenAI. GPT-6 Luna is from OpenAI. GPT-6 Sol costs $10.00 per million output tokens. GPT-6 Luna costs $0.500. GPT-6 Sol leads on the Epoch Capabilities Index: GPT-6 Sol scores 163.8 and GPT-6 Luna scores 156.8. A typical request, about 1,000 words in and 400 words out, costs $0.0076 on GPT-6 Sol and $0.0004 on GPT-6 Luna.
Prices updated . Benchmarks updated .
| GPT-6 Sol | GPT-6 Luna | |
|---|---|---|
| Lab | OpenAI | OpenAI |
| You send / 1M | $2.00 | $0.100 |
| It replies / 1M | $10.00 | $0.500 |
| Context | 1.05M | 1.05M |
| Launched | 2026-09-22 | 2026-09-22 |
| Weights | Closed | Closed |
| Typical request | $0.0076 | $0.0004 |
| ECI | 163.8 | 156.8 |
| GPQA | 94.3% | 90.5% |
| ARC-AGI-2 | 89.6% | 59.3% |
| HLE | n/a | n/a |
| AIME | 100.0% | 98.9% |
| SimpleQA | 60.7% | 41.4% |
| CritPt | 30.9% | 19.4% |
| Arena | 1,397 | 1,389 |
| Arena web | 1,678 | 1,579 |
Which is cheaper?
GPT-6 Luna costs less to run: $0.500 per million output tokens, against $10.00 for GPT-6 Sol. Input tokens are $2.00 per million for GPT-6 Sol and $0.100 per million for GPT-6 Luna. A typical request, about 1,000 words in and 400 words out, costs $0.0076 on GPT-6 Sol and $0.0004 on GPT-6 Luna.
Which scores higher?
GPT-6 Sol scores higher on Epoch Capabilities Index: 163.8 against 156.8 for GPT-6 Luna. That index is an independent composite from Epoch AI. Lab-reported scores are kept off this comparison. Context windows are 1.05M and 1.05M. Prices are US dollars per million tokens at current public rates.
Verdict
GPT-6 Sol scores higher on Epoch Capabilities Index (163.8 vs 156.8). GPT-6 Luna costs less at $0.500 per million output tokens. Context is 1.05M for GPT-6 Sol and 1.05M for GPT-6 Luna. Use the model pages for every score on file, including lab-reported numbers.
FAQ
Which is cheaper, GPT-6 Sol vs GPT-6 Luna?
GPT-6 Luna costs less to run: $0.500 per million output tokens, against $10.00 for GPT-6 Sol. Input tokens are $2.00 per million for GPT-6 Sol and $0.100 per million for GPT-6 Luna. A typical request, about 1,000 words in and 400 words out, costs $0.0076 on GPT-6 Sol and $0.0004 on GPT-6 Luna.
Which scores higher, GPT-6 Sol vs GPT-6 Luna?
GPT-6 Sol scores higher on Epoch Capabilities Index: 163.8 against 156.8 for GPT-6 Luna. That index is an independent composite from Epoch AI. Lab-reported scores are kept off this comparison. Context windows are 1.05M and 1.05M. Prices are US dollars per million tokens at current public rates.
What is the verdict for GPT-6 Sol vs GPT-6 Luna?
GPT-6 Sol scores higher on Epoch Capabilities Index (163.8 vs 156.8). GPT-6 Luna costs less at $0.500 per million output tokens. Context is 1.05M for GPT-6 Sol and 1.05M for GPT-6 Luna. Use the model pages for every score on file, including lab-reported numbers.
Open this pair in the comparison view
Sources and licenses
- OpenRouter: Prices, context windows, modalities and the model list come from the OpenRouter public API. Data: OpenRouter.
- Vercel AI Gateway: The no-training flag comes from the Vercel AI Gateway model list.
- models.dev: Lab launch dates, open-weights flags and knowledge cutoffs come from models.dev. Copyright (c) 2025 models.dev, MIT License.
- Epoch AI: Independent benchmark scores and the Epoch Capabilities Index (ECI) come from Epoch AI's Benchmarking Hub, used under CC BY 4.0. Epoch AI, Capabilities & benchmarking, epoch.ai/benchmarks. Scores Epoch marks as external keep their original license, and the source is named on each score.
- LMArena: Arena Elo (text, webdev and vision) comes from the LMArena leaderboard dataset (lmarena-ai/leaderboard-dataset), CC BY 4.0, leaderboard date 2026-10-28.
- Lab-reported scores, when an editor has added them, are the lab's own numbers. Each one links to the source and is labeled lab-reported. They are not used to rank the lists.
- What a score measures: the benchmark guide.