Kimi K3

ModelOpen sourceActive

by Moonshot AI · family “kimi-k”

Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI. It is suited for complex coding, knowledge work, and long-horizon agentic workflows, and is particularly strong at... (description from the OpenRouter listing)

in: textin: imagein: videoout: textReasoningTool useStructured output

Epoch Capabilities Index

157.7 #12 of 268

90% CI 155.1 – 160.7

Listing ↗

Released

16 Jul 2026

Context window

1.05M tokens

Max output

944K tokens

Input $ / 1M tokens

$3.00

Output $ / 1M tokens

$15.0

Cached input $ / 1M

$0.30

Each benchmark shown separately with its own source

Benchmark results (16)

All benchmarks

Benchmark	Domain	Score	vs best recorded	Setting	Run	Source
Furniture Assembly	multimodal	34.2% ±6.1	41%	max	11 Sep 2026	Epoch ↗
LMCA	agents	52.7%	81%	max	—	External ↗
DTBench	reasoning	91.2%	93%	max	—	External ↗
Mystery Game Puzzles	games	26.0% ±4.4	31%	max	29 Jul 2026	Epoch ↗
Surface Evolver Bench	science	93.0%	98%	max	—	External ↗
FrontierMath-Tiers-1-3-v2-Private	math	72.2% ±2.7	77%	max	17 Jul 2026	Epoch ↗
FrontierMath-Tier-4-v2-Private	math	39.0% ±7.7	40%	max	17 Jul 2026	Eval log ↗
DeepSWE	coding	68.5%	92%	max	—	External ↗
Chess Puzzles	games	39.0% ±4.9	54%	max	16 Jul 2026	Epoch ↗
SimpleQA Verified	knowledge	50.6% ±1.6	67%	max	27 Aug 2026	Eval log ↗
ARC-AGI-2	reasoning	60.4%	64%	max	—	External ↗
WeirdML	coding	82.6% ±0.0	88%	max	—	External ↗
OTIS Mock AIME 2024-2025	math	97.2% ±1.1	97%	max	16 Jul 2026	Epoch ↗
SimpleBench	reasoning	60.7%	74%	max	—	External ↗
GPQA diamond	science	93.1% ±1.5	97%	max	16 Jul 2026	Epoch ↗
ARC-AGI	reasoning	94.5%	96%	max	—	External ↗

Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.

API list price over time

Price history

$ per 1M tokens

4 observations (OpenRouter listing + Internet Archive snapshots). History accumulates with every ingest run; a single point means no change has been observed yet.