Pyyan / Compare / Kimi K3.1 Pro vs GPT-6 Astra
Kimi K3.1 Pro vs GPT-6 Astra
2 of 5Language Models · verified 26 Oct 2026
Kimi K3.1 ProMoonshot AIcurrent
GPT-6 AstraOpenAIcurrent| Specification | Kimi K3.1 Pro | GPT-6 Astra |
|---|---|---|
| Summary | Frontier coding numbers at a fifth of the price, with the weights promised for November. | Saturates three of the benchmarks it reports, and ships disabled for enterprise. |
| Context | 1M | 1.05M |
| Input ($/Mtok) | $2 | $10 |
| Output ($/Mtok) | $10 | $50 |
| Licence | Closed for now, weights promised 4 Nov 2026 | Proprietary |
| Max output | 944K | 128K |
| Parameters | 3T class, exact count not published | Not published |
| Released | 23 Oct 2026 | 3 Sep 2026 |
| Model ID | kimi-k3.1-pro | gpt-6-astra |
| Category | Language Models | Language Models |
| Official | Moonshot AI ↗ | — |
Highlighted rows are where these differ.
Kimi K3.1 Pro
- 65.7% on Terminal-Bench 4.0 in Moonshot's own table, against 66.4% for Claude Opus 5.5 and 58.2% for GPT-6 Astra
- Claim-level hallucination rate down from 23.4% on K3 to 8.3%
- Cyber training data deliberately removed, which Moonshot says costs about nine points on xdev-bench-hard
- Full weights promised by 4 November 2026, so the licence is not yet knowable
Best for long-horizon coding when the budget is the constraint.
GPT-6 Astra
- 97.6% on FrontierMath Tier 4, 99.9% on ARC-AGI-3 and 100% on ExploitBench
- Above 272K input tokens the whole request reprices: input and cache at 2x, output at 1.5x
- Rolls out to OpenAI's Daybreak cyber programme first, and arrives switched off for enterprise
Best for hard reasoning and computer use.