Signal SentrySearchUpdated Oct 28, 05:30 UTCAM Drop
Models · scorecard

Kimi K3.1 Pro

What the vendor claims, next to what independent boards measured. The two are never mixed in one column.

At a glance

Maker
MoonshotAI
Price per 1M tokens
$2 in · $10 out
Context window
1.05M
Input → output
text, image, video → text
Added to OpenRouter
Oct 23, 2026

Source: OpenRouter, as of Oct 28, 09:19 UTC. Model page on OpenRouter

What the vendor claims

Quoted word for word from the vendor's own launch post or model card. Claims, not measurements.

Scores the vendor claims, each with its source and the quoted line
BenchmarkClaimedSource
Terminal-Bench 4.0The source says: K3.1 Pro scores 65.7%, ahead of GPT-6 Astra (58.2%) and narrowly behind Claude Opus 5.5 (66.4%).65.7%Moonshot AI · Oct 23From Drop #044 · Sat, Oct 24 · Evening
BenchCADSetting: with toolsThe source says: K3.1 Pro scores 92.7% with tools, approaching the performance of Claude Opus 5.5 (96.2%) and GPT-6 Astra (95.9%).92.7%Moonshot AI · Oct 23From Drop #044 · Sat, Oct 24 · Evening
OfficeQA Pro v2The source says: K3.1 Pro achieves state-of-the-art results on OfficeQA Pro v2 (64.4)64.4Moonshot AI · Oct 23From Drop #044 · Sat, Oct 24 · Evening
Kimi Hallu Bench Hard, claim hallucination rateThe source says: its claim-level hallucination rate fell from 23.4% for K3 to 8.3%8.3%Moonshot AI · Oct 23From Drop #044 · Sat, Oct 24 · Evening
Terminal-Bench 4.0Setting: max reasoning, Claude Code harnessThe source says: K3.1 Pro scores 65.7%, ahead of GPT-6 Astra (58.2%) and narrowly behind Claude Opus 5.5 (66.4%).65.7%Moonshot AI · Oct 23From Drop #043 · Sat, Oct 24 · Morning

Independent results

Measured by independent sources (Epoch AI, LMArena, OpenRouter's benchmark runs, τ²-bench, Vectara), not by the vendor. "Listed as" is the source's own name for the model, so you can check our match.

Independent benchmark results for this model, each with its source and date
BoardResultRank
LMArena · WebDevListed as: Kimi K3.1 Pro (Max)LMArena (CC BY 4.0), as of Oct 27, 2026. Source1,695Arena score8

Price history

OpenRouter's list price per 1M tokens in each of our snapshots.

  • Output now $10
  • Input now $2

Unchanged across our 9 snapshots.

Show the numbers
This model's OpenRouter price in each of our snapshots
SnapshotInput $/1MOutput $/1M
Oct 28, 09:22 UTC$2$10
Oct 27, 16:03 UTC$2$10
Oct 27, 04:03 UTC$2$10
Oct 26, 16:04 UTC$2$10
Oct 26, 04:03 UTC$2$10
Oct 25, 16:04 UTC$2$10
Oct 25, 06:03 UTC$2$10
Oct 24, 15:04 UTC$2$10
Oct 24, 03:03 UTC$2$10

Source: OpenRouter, as of Oct 28, 09:22 UTC

In the Drops

Models

Kimi K3.1 Pro draws 994 HN points; Moonshot claims 65.7% on Terminal-Bench 4.0

Moonshot's launch post says K3.1 Pro scores 65.7% on Terminal-Bench 4.0, ahead of GPT-6 Astra's 58.2% and behind Claude Opus 5.5's 66.4%, and that it removed cyber-related training data for the open-weight release.

Why it matters: The vendor's own numbers put an open-weight model, with weights due by Nov 4, near closed models on agentic coding. Independent checks are still to come.

Moonshot AI · Oct 23Hacker News · discussion
From Drop #044 · Sat, Oct 24 · Evening