When was Claude 3 Haiku released?

Claude 3 Haiku was released by Anthropic on Mar 4 2024.

When was Kimi K2 released?

Kimi K2 was released by Moonshot AI on Jul 11 2025.

Which scores higher on GPQA Diamond, Claude 3 Haiku or Kimi K2?

Kimi K2 leads on GPQA Diamond — Claude 3 Haiku 33.3% vs Kimi K2 75.1%.

Is Claude 3 Haiku or Kimi K2 open source?

Kimi K2 is an open-source / open-weight model released by Moonshot AI. Claude 3 Haiku is a proprietary model released by Anthropic.

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Home/Compare/Claude 3 Haiku vs Kimi K2

Claude 3 Haiku vs Kimi K2

0 vs 1 benchmarks won

	Anthropic Claude 3 Haiku	Moonshot AI Kimi K2
Overview
Company	Anthropic	Moonshot AI
Release date	Mar 4 2024	Jul 11 2025
Model type	—	—
Open source	No	Yes
Specifications
Parameters	—	1T
Context window	—	128k
Benchmarks
Coding SWE-Bench Verified	—	65.8%
Science GPQA Diamond	33.3%	75.1%Best
Timeline
Release gap	Claude 3 Haiku shipped 494 days before Kimi K2

Which is better: Claude 3 Haiku or Kimi K2?

Kimi K2 leads Claude 3 Haiku on 1 of the 1 benchmark they both report (GPQA Diamond). Claude 3 Haiku shipped 494 days before Kimi K2, so benchmark comparisons should account for the intervening progress.

Kimi K2 is an open-source / open-weight model; Claude 3 Haiku is proprietary.

On GPQA Diamond, Kimi K2 leads at 75.1% vs Claude 3 Haiku at 33.3%.

Frequently asked questions

When was Claude 3 Haiku released?: Claude 3 Haiku was released by Anthropic on Mar 4 2024.
When was Kimi K2 released?: Kimi K2 was released by Moonshot AI on Jul 11 2025.
Which scores higher on GPQA Diamond, Claude 3 Haiku or Kimi K2?: Kimi K2 leads on GPQA Diamond — Claude 3 Haiku 33.3% vs Kimi K2 75.1%.
Is Claude 3 Haiku or Kimi K2 open source?: Kimi K2 is an open-source / open-weight model released by Moonshot AI. Claude 3 Haiku is a proprietary model released by Anthropic.