GPT-6.1 Terra vs GPT-6 Astra
GPT-6.1 Terra is from OpenAI. GPT-6 Astra is from OpenAI. GPT-6.1 Terra costs $5.00 per million output tokens. GPT-6 Astra costs $50.00. GPT-6 Astra leads on the Epoch Capabilities Index: GPT-6.1 Terra scores 168.1 and GPT-6 Astra scores 169.1. A typical request, about 1,000 words in and 400 words out, costs $0.0038 on GPT-6.1 Terra and $0.038 on GPT-6 Astra.
Prices updated . Benchmarks updated .
| GPT-6.1 Terra | GPT-6 Astra | |
|---|---|---|
| Lab | OpenAI | OpenAI |
| You send / 1M | $1.00 | $10.00 |
| It replies / 1M | $5.00 | $50.00 |
| Context | 1.05M | 1.05M |
| Launched | 2026-10-26 | 2026-09-04 |
| Weights | Closed | Closed |
| Typical request | $0.0038 | $0.038 |
| ECI | 168.1 | 169.1 |
| GPQA | 94.3% | 95.8% |
| ARC-AGI-2 | n/a | 95.0% |
| HLE | n/a | 54.8% |
| AIME | 100.0% | 100.0% |
| SimpleQA | 57.3% | 75.6% |
| CritPt | 28.0% | 31.7% |
| Arena | n/a | 1,441 |
| Arena web | 1,673 | 1,773 |
Which is cheaper?
GPT-6.1 Terra costs less to run: $5.00 per million output tokens, against $50.00 for GPT-6 Astra. Input tokens are $1.00 per million for GPT-6.1 Terra and $10.00 per million for GPT-6 Astra. A typical request, about 1,000 words in and 400 words out, costs $0.0038 on GPT-6.1 Terra and $0.038 on GPT-6 Astra.
Which scores higher?
GPT-6 Astra scores higher on Epoch Capabilities Index: 169.1 against 168.1 for GPT-6.1 Terra. 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 Astra scores higher on Epoch Capabilities Index (169.1 vs 168.1). GPT-6.1 Terra costs less at $5.00 per million output tokens. Context is 1.05M for GPT-6.1 Terra and 1.05M for GPT-6 Astra. Use the model pages for every score on file, including lab-reported numbers.
FAQ
Which is cheaper, GPT-6.1 Terra vs GPT-6 Astra?
GPT-6.1 Terra costs less to run: $5.00 per million output tokens, against $50.00 for GPT-6 Astra. Input tokens are $1.00 per million for GPT-6.1 Terra and $10.00 per million for GPT-6 Astra. A typical request, about 1,000 words in and 400 words out, costs $0.0038 on GPT-6.1 Terra and $0.038 on GPT-6 Astra.
Which scores higher, GPT-6.1 Terra vs GPT-6 Astra?
GPT-6 Astra scores higher on Epoch Capabilities Index: 169.1 against 168.1 for GPT-6.1 Terra. 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-6.1 Terra vs GPT-6 Astra?
GPT-6 Astra scores higher on Epoch Capabilities Index (169.1 vs 168.1). GPT-6.1 Terra costs less at $5.00 per million output tokens. Context is 1.05M for GPT-6.1 Terra and 1.05M for GPT-6 Astra. 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.