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Claude 3 Opus vs Kimi-Dev

2 vs 0 benchmarks won

Anthropic
Claude 3 Opus
Moonshot AI
Kimi-Dev
Overview
CompanyAnthropicMoonshot AI
Release dateMar 4 2024Jun 2025
Model type
Open sourceNoYes
Specifications
Parameters
72B
Context window
Benchmarks
Science reasoning
GPQA Diamond
50.4%
Software engineering
SWE-Bench Verified
33%
Multimodal understanding
MMMU
Timeline
Release gapClaude 3 Opus shipped 454 days before Kimi-Dev

Which is better: Claude 3 Opus or Kimi-Dev?

Claude 3 Opus leads Kimi-Dev on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude 3 Opus shipped 454 days before Kimi-Dev, so benchmark comparisons should account for the intervening progress.

Kimi-Dev is an open-source / open-weight model; Claude 3 Opus is proprietary.

Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Claude 3 Opus released?
Claude 3 Opus was released by Anthropic on Mar 4 2024.
When was Kimi-Dev released?
Kimi-Dev was released by Moonshot AI on Jun 2025.
Is Claude 3 Opus or Kimi-Dev open source?
Kimi-Dev is an open-source / open-weight model released by Moonshot AI. Claude 3 Opus is a proprietary model released by Anthropic.

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