月之暗面发布 Kimi K3.1 Pro，API 上线并承诺 11 月 4 日前开放权重
Introducing Kimi K3.1 Pro
AI 导读
月之暗面今日在 Kimi API 上线 Kimi K3.1 Pro，暂未开放权重，但承诺 2026 年 11 月 4 日前发布完整模型权重。
摘要与补充说明
定价为输入 $2.00/百万 tokens、输出 $10/百万 tokens，与 GPT-6.1 Sol 相同，是 Claude Opus 5.5 的一半；另提供速度提升 2-3 倍、价格翻倍的 Highspeed 版本，输入 token 缓存命中价格不变。
同一新闻，精选展示《月之暗面发布 Kimi K3.1 Pro，Artificial Analysis 智能指数升至第四》
正文
23rd October 2026 - Link Blog
Introducing Kimi K3.1 Pro (via) Kimi K3.1 Pro landed on the Kimi API today - it's not yet open weights, but Moonshot promise "Full model weights will be released by Nov 4, 2026".
They're also offering a "Highspeed" version that's 2-3x faster, at twice the price (except for input token cache hits, which are priced the same).
The US dollar pricing is $2.00/million tokens for input and $10/million for output - the same as GPT-6.1 Sol and half the price of Claude Opus 5.5.
Moonshot's own benchmarks show Kimi as approximately level with Opus 5.5 and GPT-6 Astra - beating them on a few benchmarks, coming close on others.
Artificial Analysis scored Kimi at 55 - ahead of Claude Fable 5.1, GPT-6 Astra, and Gemini 4 Argon (all at 53) and behind only Claude Opus 5.5 (58).
This is the first time a (soon-to-be) open weight model has scored this highly against the frontier.
I tried it out via the Moonshot API using the llm openai endpoint command I added to LLM 0.32 back in August:
llm openai endpoint \
https://api.moonshot.ai/v1 \
--key kimi \
-m kimi-k3.1-pro \
"Generate an SVG of a pelican riding a bicycle" \
--responses \
-o reasoning_effort low \
> kimi-k3.1-pro-pelican-low.stdout.txt \
2> kimi-k3.1-pro-pelican-low.stderr.txt
llm openai endpoint can run prompts against any OpenAI-compatible endpoint but doesn't log the results, hence the extra options to save stdout and stderr (the reasoning trace).
Here are the pelicans I got for Kimi K3.1 Pro on the three reasoning levels it supports - low, medium, and max. This is max:
For comparison, I ran fresh pelicans against Kimi K3 on those three reasoning levels.