Kimi K2.5 | Epoch AI

ECI#71

148

Moonshot

Jan. 27, 2026

Open weights

Kimi K2.5 is an open-weights model from Moonshot, released January 27, 2026. It has an ECI score of 148 and ranks 71st of 254 tracked models. At the time of its release, it ranked 9th of 168 tracked models.

Kimi K2.5 vs select alternatives

Domain	Benchmark	Kimi K2.5 Moonshot Jan. 27, 2026 Open weights	Kimi K2 Thinking Moonshot Nov. 6, 2025 Open weights	GPT-5.4 Mini OpenAI Mar. 17, 2026 Closed weights	DeepSeek-V3.2 DeepSeek Dec. 1, 2025 Open weights
	ECI scoreBest score 169	148	146	149	146
	Ranking	#71	#88	#69	#84
Conceptual reasoning	ARC-AGI-2Best score 95%	12%	n/a	19%	4%
	ARC-AGI-1Best score 99%	65%	n/a	64%	57%
Mathematics	OTIS Mock AIME 2024-2025Best score 100%	92%	83%	89%	88%
Science	SciCodeBest score 67%	49%	n/a	52%	n/a
	GPQA DiamondBest score 96%	88%	84%	87%	83%
Software engineering	Text Arena (Coding)Best score 1820	1436	1337	1397	1325
	Terminal-Bench 2.0Best score 85%	43%	36%	n/a	40%
	WeirdML (v2)Best score 94%	46%	43%	60%	n/a
World knowledge	SimpleQA VerifiedBest score 76%	34%	n/a	29%	n/a

Model metadata

General
Organization	Moonshot
Release date	Jan. 27, 2026
Model accessibility	Open weights
Country	China
Knowledge cutoff	Unknown
Provider notes	Kimi K2.5: Visual Agentic Intelligence

Pricing
Input price	$0.551 / 1M tokens
Output price	$2.825 / 1M tokens

Training
Parameters	1.0e12
Training compute	5.8e24 FLOP
Training hardware	NVIDIA H800 SXM5
Training time	Unknown
Training dataset size	Unknown