Claude Instant 1.2 vs Kimi K2 (0905)
Anthropic Claude Instant 1.2 | Moonshot AI Kimi K2 (0905) | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Aug 9 2023 | Sep 5 2025 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 1T |
Context window | — | 256k |
| Benchmarks | ||
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | — | 65.8% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 75.1% |
| Timeline | ||
| Release gap | Claude Instant 1.2 shipped 758 days before Kimi K2 (0905) | |
Which is better: Claude Instant 1.2 or Kimi K2 (0905)?
Claude Instant 1.2 and Kimi K2 (0905) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude Instant 1.2 shipped 758 days before Kimi K2 (0905), so benchmark comparisons should account for the intervening progress.
Claude Instant 1.2 is proprietary, while Kimi K2 (0905) is open weight.
Direct benchmark comparisons are unavailable — Claude Instant 1.2 and Kimi K2 (0905) don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude Instant 1.2 was released by Anthropic on Aug 9 2023.
Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.
Claude Instant 1.2 is a proprietary model released by Anthropic. Kimi K2 (0905) is an open weight model released by Moonshot AI.
Other comparisons
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