When was Claude Haiku 4.5 released?

Claude Haiku 4.5 was released by Anthropic on Oct 15 2025.

When was Kimi K2 Thinking released?

Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.

Which is better at coding, Claude Haiku 4.5 or Kimi K2 Thinking?

Claude Haiku 4.5 leads on SWE-Bench Verified — Claude Haiku 4.5 73.3% vs Kimi K2 Thinking 71.3%.

Is Claude Haiku 4.5 or Kimi K2 Thinking open source?

Kimi K2 Thinking is an open-source / open-weight model released by Moonshot AI. Claude Haiku 4.5 is a proprietary model released by Anthropic.

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Home/Compare/Claude Haiku 4.5 vs Kimi K2 Thinking

Claude Haiku 4.5 vs Kimi K2 Thinking

1 vs 0 benchmarks won

	Anthropic Claude Haiku 4.5	Moonshot AI Kimi K2 Thinking
Overview
Company	Anthropic	Moonshot AI
Release date	Oct 15 2025	Nov 6 2025
Model type	—	—
Open source	No	Yes
Specifications
Parameters	—	1T
Context window	—	256k
Benchmarks
Coding SWE-Bench Verified	73.3%Best	71.3%
Science GPQA Diamond	73%	—
Timeline
Release gap	Claude Haiku 4.5 shipped 22 days before Kimi K2 Thinking

Which is better: Claude Haiku 4.5 or Kimi K2 Thinking?

Claude Haiku 4.5 leads Kimi K2 Thinking on 1 of the 1 benchmark they both report (SWE-Bench Verified). Claude Haiku 4.5 shipped 22 days before Kimi K2 Thinking, so benchmark comparisons should account for the intervening progress.

Kimi K2 Thinking is an open-source / open-weight model; Claude Haiku 4.5 is proprietary.

On SWE-Bench Verified, Claude Haiku 4.5 leads at 73.3% vs Kimi K2 Thinking at 71.3%.

Frequently asked questions

When was Claude Haiku 4.5 released?: Claude Haiku 4.5 was released by Anthropic on Oct 15 2025.
When was Kimi K2 Thinking released?: Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.
Which is better at coding, Claude Haiku 4.5 or Kimi K2 Thinking?: Claude Haiku 4.5 leads on SWE-Bench Verified — Claude Haiku 4.5 73.3% vs Kimi K2 Thinking 71.3%.
Is Claude Haiku 4.5 or Kimi K2 Thinking open source?: Kimi K2 Thinking is an open-source / open-weight model released by Moonshot AI. Claude Haiku 4.5 is a proprietary model released by Anthropic.