DeepSeek-V4-Flash-0731vsKimi K2 (0905)
DeepSeek-V4-Flash-0731 | Kimi K2 (0905) | |
|---|---|---|
| Specifications | ||
Parameters | — | 1T |
Context window | — | 256k |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 38% | — |
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% |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 82.7% | — |
Personal tool use Toolathlon-VerifiedTests how well the AI uses everyday personal tools and apps to get things done — a human-checked version of Toolathlon. Higher is better. | 70.3% | — |
Cybersecurity CyberGymTests the AI on cybersecurity challenges — finding and exploiting software weaknesses inside a safe sandbox. Higher is better. | 76.7% | — |
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% |
Business workflows AutomationBenchTests whether the AI can run real multi-step business workflows — the kind of end-to-end office processes companies want to automate — from start to finish. Higher is better. | 25.1% | — |
| Overview | ||
| Company | DeepSeek | Moonshot AI |
| Release date | Jul 31 2026 | Sep 5 2025 |
| Access | Proprietary | Open Weight |
Which is better: DeepSeek-V4-Flash-0731 or Kimi K2 (0905)?
DeepSeek-V4-Flash-0731 and Kimi K2 (0905) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi K2 (0905) shipped 329 days before DeepSeek-V4-Flash-0731, so benchmark comparisons should account for the intervening progress.
DeepSeek-V4-Flash-0731 is proprietary, while Kimi K2 (0905) is open weight.
Direct benchmark comparisons are unavailable — DeepSeek-V4-Flash-0731 and Kimi K2 (0905) don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek-V4-Flash-0731 was released by DeepSeek on Jul 31 2026.
Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.
DeepSeek-V4-Flash-0731 is a proprietary model released by DeepSeek. Kimi K2 (0905) is an open weight model released by Moonshot AI.
Other comparisons
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