When was Claude 3.5 Haiku released?

Claude 3.5 Haiku was released by Anthropic on Oct 22 2024.

When was Kimi K2 (0905) released?

Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.

Which is better at coding, Claude 3.5 Haiku or Kimi K2 (0905)?

Kimi K2 (0905) leads on SWE-Bench Verified — Claude 3.5 Haiku 40.6% vs Kimi K2 (0905) 65.8%.

Which scores higher on GPQA Diamond, Claude 3.5 Haiku or Kimi K2 (0905)?

Kimi K2 (0905) leads on GPQA Diamond — Claude 3.5 Haiku 41.6% vs Kimi K2 (0905) 75.1%.

Is Claude 3.5 Haiku or Kimi K2 (0905) open source?

Kimi K2 (0905) is an open-source / open-weight model released by Moonshot AI. Claude 3.5 Haiku is a proprietary model released by Anthropic.

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Home/Compare/Claude 3.5 Haiku vs Kimi K2 (0905)

Claude 3.5 Haiku vs Kimi K2 (0905)

0 vs 2 benchmarks won

	Anthropic Claude 3.5 Haiku	Moonshot AI Kimi K2 (0905)
Overview
Company	Anthropic	Moonshot AI
Release date	Oct 22 2024	Sep 5 2025
Model type	—	—
Open source	No	Yes
Specifications
Parameters	—	1T
Context window	—	256k
Benchmarks
Coding SWE-Bench Verified	40.6%	65.8%Best
Science GPQA Diamond	41.6%	75.1%Best
Timeline
Release gap	Claude 3.5 Haiku shipped 318 days before Kimi K2 (0905)

Which is better: Claude 3.5 Haiku or Kimi K2 (0905)?

Kimi K2 (0905) leads Claude 3.5 Haiku on 2 of the 2 benchmarks they both report (SWE-Bench Verified, GPQA Diamond). Claude 3.5 Haiku shipped 318 days before Kimi K2 (0905), so benchmark comparisons should account for the intervening progress.

Kimi K2 (0905) is an open-source / open-weight model; Claude 3.5 Haiku is proprietary.

On SWE-Bench Verified, Kimi K2 (0905) leads at 65.8% vs Claude 3.5 Haiku at 40.6%. On GPQA Diamond, Kimi K2 (0905) leads at 75.1% vs Claude 3.5 Haiku at 41.6%.

Frequently asked questions

When was Claude 3.5 Haiku released?: Claude 3.5 Haiku was released by Anthropic on Oct 22 2024.
When was Kimi K2 (0905) released?: Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.
Which is better at coding, Claude 3.5 Haiku or Kimi K2 (0905)?: Kimi K2 (0905) leads on SWE-Bench Verified — Claude 3.5 Haiku 40.6% vs Kimi K2 (0905) 65.8%.
Which scores higher on GPQA Diamond, Claude 3.5 Haiku or Kimi K2 (0905)?: Kimi K2 (0905) leads on GPQA Diamond — Claude 3.5 Haiku 41.6% vs Kimi K2 (0905) 75.1%.
Is Claude 3.5 Haiku or Kimi K2 (0905) open source?: Kimi K2 (0905) is an open-source / open-weight model released by Moonshot AI. Claude 3.5 Haiku is a proprietary model released by Anthropic.