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Claude 2.1 vs Kimi K1.5

Anthropic Claude 2.1 vs Moonshot AI Kimi K1.5 — side-by-side specs.

Anthropic
Claude 2.1
Moonshot AI
Kimi K1.5
Overview
CompanyAnthropicMoonshot AI
Release dateNov 21 2023Jan 20 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
128k
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapClaude 2.1 shipped 426 days before Kimi K1.5

Which is better: Claude 2.1 or Kimi K1.5?

Claude 2.1 and Kimi K1.5 do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Claude 2.1 shipped 426 days before Kimi K1.5, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

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 2.1 released?
Claude 2.1 was released by Anthropic on Nov 21 2023.
When was Kimi K1.5 released?
Kimi K1.5 was released by Moonshot AI on Jan 20 2025.

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