Moonshot AI Releases Kimi K3.1 Pro Model with 1M Context Window
Moonshot AI has launched its new Kimi K3.1 Pro large language model, marking the first entry in its K3.1 series. This release was widely reported across numerous outlets, with details largely stemming from Moonshot AI's own announcements, including a tech blog on alphaXiv. The model is confirmed to feature a 1-million token context window and is described as a Mixture-of-Experts (MoE) architecture with 2.8 trillion total and 104 billion active parameters. Moonshot AI claims Kimi K3.1 Pro rivals or surpasses Anthropic's Claude Opus 5.5 and GPT Astra 6 on specific benchmarks, particularly in coding, and is priced at half the cost of Claude Opus 5.5. However, there is a discrepancy among reports regarding the immediate availability of its "open weights," with some sources indicating a future release date.
12 articles from 12 outlets covered this story. Their coverage differs on 2 points. The underlying claim is sourced from a benchmark.
What do all outlets agree on?
12 outlets covered “Moonshot AI Releases Kimi K3.1 Pro Model with 1M Context Window”. All of them report the following:
- Moonshot AI released Kimi K3.1 Pro
- It is the first model in the K3.1 series
- It features a 1-million token context window
- It is a Chinese AI model
- It is an MoE model with 2.8 trillion total and 104 billion active parameters
- It is positioned to rival Anthropic's Claude Opus 5.5
- Moonshot AI claims it beats Claude Opus 5.5 and GPT Astra 6 on some benchmarks
- Moonshot AI claims it is priced at half of Claude Opus 5.5
Did outlets disagree about this?
Yes. Coverage of “Moonshot AI Releases Kimi K3.1 Pro Model with 1M Context Window” differs on 2 points. Each account below is how a different outlet described the same event:
Kimi K3.1 Pro is an open-weight model.
Kimi K3.1 Pro's open weights are due November 4.
Which outlets covered this?
All 12 articles found on this story, grouped by the stance of the piece. Every link goes to the original publisher.