# TestingCatalog — Kimi K3.1 is prepared for upcoming release after Arena testing

- Company: TestingCatalog (testingcatalog.com)
- Announced: 2026-10-23T09:00:38+00:00
- Category: new-model
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://www.testingcatalog.com/kimi-k3-1-spotted-testing-arena/
- Record: https://forck.live/items/27059-kimi-k3-1-is-prepared-for-upcoming-release-after-arena-testing
- Subject: AI models / agents / unreleased features
- Open weights: yes
- Models affected: Kimi K3.1, Kibitz, Kimi K3, GPT-6 Astra, Claude Fable 5.1, Opus 5.5, GPT-6.1 Sol Max, Sonnet, GPT-6.1 Terra, Fable 5.5
- Pricing: GPT6 ASTRA 5,738 BLOCKS • $5.31; KIMI K3.1 13,707 BLOCKS • $0.38

Moonshot appears close to releasing Kimi K3.1, after an anonymous model called Kibitz drew attention on Arena and the company published a teaser for the upcoming launch. Arena's own account told users a new model from @Kimi_Moonshot is coming, and X user Chris claimed it will arrive before Tuesday next week as a low-cost, state-of-the-art open-source model. Chris shared a comparison asking each model to "build what you think you look like in Minecraft," in which GPT-6 Astra placed 5,738 blocks at a cost of $5.31 while Kimi K3.1 placed 13,707 blocks for $0.38. Other early outputs showed a 3D helicopter with takeoff and landing, assembly and exploded views built in under 15 minutes, and one user found Kibitz noticeably faster than Claude Fable 5.1 in a 3D test, rating the result close to Opus 5.5 Medium. Those results come from one-shot Arena battles, so the report cautions they should be treated with scepticism until a model card appears. The pattern echoes Kimi K3, which was spotted on Arena under the codename Kivine in July and launched within days on July 16 as a 2.8-trillion-parameter model with a 1M-token context window, priced at $3 input and $15 output per million tokens, with open weights following on July 27.

## Evidence

Verbatim from https://www.testingcatalog.com/kimi-k3-1-spotted-testing-arena/:

> Kimi k3.1 (Kibitz on Arena) will release before Tuesday next week. It will be a state of the art Open Source model at low cost. “build what you think you look like in Minecraft” GPT6 ASTRA 5,738 BLOCKS • $5.31 KIMI K3.1 13,707 BLOCKS • $0.38

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Record: https://forck.live/items/27059-kimi-k3-1-is-prepared-for-upcoming-release-after-arena-testing
Catalogue: https://forck.live/llms.txt
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