Moonshot ships Kimi K3.1 Pro; full weights still due November 4
October 25: Interconnects hosts say weights follow about two weeks of exclusive access, cite mixed quality and a roughly 20-point Terminal-Bench Science gap versus GPT-6 Astra, and call a paid-promotion screenshot uncorroborated.
Kimi K3.1 Pro is live on Moonshot and reseller APIs, while full weights remain promised for November 4.
Moonshot AI released Kimi K3.1 Pro, a post-trained mixture-of-experts model it describes as 2.8 trillion parameters with 104 billion active and a 1-million-token context, plus a Highspeed tier said to be 2–3× faster at twice the price except cached input. Standard Moonshot pricing is $2 per million input tokens and $10 output. The Decoder says Artificial Analysis scores it 55, three points behind Claude Opus 5.5 at 58. Simon Willison, The Decoder, and Latent Space say weights stay unpublished until November 4, 2026; Hacker News and MarkTechPost describe the model as open-weight now. Vani lists a cheaper API and, on October 25, a Soft-Derisked variant; Moonshot and Vani cite different hallucination drops.
- Highspeed is 2–3× faster and costs twice as much, except cached input.
- Moonshot reports 65.7% on Terminal-Bench 4.0; The Decoder says K3 scored 13%.
- After cyber-data removal, Moonshot says xdev-bench-hard fell from 90.5% to 81.0%.
- Vani API is $1.40 input and $7 output; Soft-Derisked is $5 input and $7 output.
- Hallucination claims: 23.4% to 8.3% (Moonshot) versus 23.35% to 6.85% (Vani).
- Latent Space: eighth in Code Arena WebDev at 1,692; Cyber Index 64%, second.
Timeline
dated events in the reporting · oldest first- Oct 23, 2026Kimi K3.1 Pro and Highspeed go live on Kimi products. · Hacker News
- Oct 24, 2026Vani lists Kimi K3.1 Pro on chat and its API. · Vani AI
- Oct 25, 2026Vani adds a Soft-Derisked K3.1 Pro listing. · Vani AI
- Nov 4, 2026Moonshot plans to release the full model weights. · The Decoder
What each outlet adds
beyond the shared facts- The DecoderParameter split, price cut, cyber-data cleaning, and AA 55 versus 58.
- Simon WillisonWeights still closed; Highspeed twice price; parity with GPT-6.1 Sol.
- Latent SpaceArena and Cyber Index ranks, plus Kimi Hosted Agents.
- Vani AIReseller pricing and an 18-plus Soft-Derisked API variant.
- InterconnectsMixed quality impressions and an uncorroborated paid-promotion claim.
- Vendors
- Moonshot AIKimiMoonshotVani
- Organizations
- Artificial AnalysisVaniMoonshotAnthropic
- Countries
- China
Coverage
oldest first · one row per article · UTC- · 2d ago
Hacker News · AIFirst report
Kimi introduces K3.1 Pro, a 3T model with 1M context
The model and a faster Highspeed variant are live in Kimi products now; full weights are promised by November 4.
- · 2d ago
The Decoder
Moonshot releases Kimi K3.1 Pro, fourth on AA index
A planned November 4 weights release would, Moonshot says, make it the top open model, 3 points behind Claude Opus 5.5.
- · 2d ago
Simon Willison
Moonshot puts Kimi K3.1 Pro on the Kimi API
Weights stay closed until a promised November 4 release; a faster tier costs twice as much.
- · 1d ago
MarkTechPost
Moonshot AI releases open-weight Kimi K3.1 Pro
The title lists 2.8T total parameters, 104B active parameters, and a 1 million-token context.
- · 1d ago
Latent Space
Moonshot launches Kimi K3.1 Pro; weights promised November 4
The 2.8T mixture-of-experts model, with 104B active parameters, scored 55 on Artificial Analysis; the API is live but weights are not.
- · 1d ago
Vani AI
Kimi K3.1 Pro is available on Vani Chat and API
Moonshot says unsupported claims fell from 23.35% to 6.85%, with open weights planned for early November.
- · 10h ago
Vani adds Kimi K3.1 Pro Soft-Derisked to chat and API
API pricing is $5 per million input tokens and $7 for output, with an 18-plus confirmation in chat.
- · 8h ago
Interconnects
Podcast weighs mixed reaction to Kimi K3.1 Pro benchmarks
Hosts say weights are due by November 4 after about two weeks of exclusive access, with quality impressions still mixed.