DeepSeek-V4-Flash-0731vsgpt-oss-120b
DeepSeek-V4-Flash-0731 | gpt-oss-120b | |
|---|---|---|
| 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%Best | 11% |
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% | — |
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 | OpenAI |
| Release date | Jul 31 2026 | Aug 5 2025 |
| Access | Proprietary | Open Weight |
Which is better: DeepSeek-V4-Flash-0731 or gpt-oss-120b?
DeepSeek-V4-Flash-0731 leads gpt-oss-120b on 1 of the 1 benchmark they both report (BullshitBench v2). gpt-oss-120b shipped 360 days before DeepSeek-V4-Flash-0731, so benchmark comparisons should account for the intervening progress.
DeepSeek-V4-Flash-0731 is proprietary, while gpt-oss-120b is open weight.
On BullshitBench v2, DeepSeek-V4-Flash-0731 leads at 38% vs gpt-oss-120b at 11%.
Frequently asked questions
DeepSeek-V4-Flash-0731 was released by DeepSeek on Jul 31 2026.
gpt-oss-120b was released by OpenAI on Aug 5 2025.
DeepSeek-V4-Flash-0731 is a proprietary model released by DeepSeek. gpt-oss-120b is an open weight model released by OpenAI.
Other comparisons
DeepSeek-V4-Flash-0731vsClaude Opus 5gpt-oss-120bvsClaude Opus 5DeepSeek-V4-Flash-0731vsGemini 3.6 Flashgpt-oss-120bvsGemini 3.6 FlashDeepSeek-V4-Flash-0731vsMuse Spark 1.1gpt-oss-120bvsMuse Spark 1.1DeepSeek-V4-Flash-0731vsGrok 4.5gpt-oss-120bvsGrok 4.5DeepSeek-V4-Flash-0731vsMistral Medium 3.5gpt-oss-120bvsMistral Medium 3.5DeepSeek-V4-Flash-0731vsKimi K3gpt-oss-120bvsKimi K3