When was Claude Opus 4.6 released?

Claude Opus 4.6 was released by Anthropic on Feb 5 2026.

When was Kimi K2 Thinking released?

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

Which is better at coding, Claude Opus 4.6 or Kimi K2 Thinking?

On SWE-Bench Verified (real-world software-engineering tasks), Claude Opus 4.6 leads — Claude Opus 4.6 scores 80.8% and Kimi K2 Thinking scores 71.3%.

Is Claude Opus 4.6 or Kimi K2 Thinking open source?

Kimi K2 Thinking is an open-source / open-weight model released by Moonshot AI. Claude Opus 4.6 is a proprietary model released by Anthropic.

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Claude Opus 4.6 vs Kimi K2 Thinking

2 vs 0 benchmarks won

	Anthropic Claude Opus 4.6	Moonshot AI Kimi K2 Thinking
Overview
Company	Anthropic	Moonshot AI
Release date	Feb 5 2026	Nov 6 2025
Model type	—	—
Open source	No	Yes
Specifications
Parameters	—	1T
Context window	—	256k
Benchmarks
Science reasoning GPQA Diamond	91.3%	—
Software engineering SWE-Bench Verified	80.8%	71.3%
Multimodal understanding MMMU	—	—
Timeline
Release gap	Kimi K2 Thinking shipped 91 days before Claude Opus 4.6

Which is better: Claude Opus 4.6 or Kimi K2 Thinking?

Claude Opus 4.6 leads Kimi K2 Thinking on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Kimi K2 Thinking shipped 91 days before Claude Opus 4.6, so benchmark comparisons should account for the intervening progress.

Kimi K2 Thinking is an open-source / open-weight model; Claude Opus 4.6 is proprietary.

On SWE-Bench Verified, Claude Opus 4.6 scores 80.8%, 9.5 points above Kimi K2 Thinking at 71.3%.

Frequently asked questions

When was Claude Opus 4.6 released?: Claude Opus 4.6 was released by Anthropic on Feb 5 2026.
When was Kimi K2 Thinking released?: Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.
Which is better at coding, Claude Opus 4.6 or Kimi K2 Thinking?: On SWE-Bench Verified (real-world software-engineering tasks), Claude Opus 4.6 leads — Claude Opus 4.6 scores 80.8% and Kimi K2 Thinking scores 71.3%.
Is Claude Opus 4.6 or Kimi K2 Thinking open source?: Kimi K2 Thinking is an open-source / open-weight model released by Moonshot AI. Claude Opus 4.6 is a proprietary model released by Anthropic.