DeepSeek-V4-Flash vs GPT-5.6 Sol
DeepSeek DeepSeek-V4-Flash | OpenAI GPT-5.6 Sol | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Apr 24 2026 | Jun 26 2026 |
| Access | Open Weight | Proprietary |
| 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. | 18% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 88.1% | — |
| Timeline | ||
| Release gap | DeepSeek-V4-Flash shipped 63 days before GPT-5.6 Sol | |
Which is better: DeepSeek-V4-Flash or GPT-5.6 Sol?
DeepSeek-V4-Flash and GPT-5.6 Sol don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek-V4-Flash shipped 63 days before GPT-5.6 Sol, so benchmark comparisons should account for the intervening progress.
DeepSeek-V4-Flash is open weight, while GPT-5.6 Sol is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek-V4-Flash and GPT-5.6 Sol don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek-V4-Flash was released by DeepSeek on Apr 24 2026.
GPT-5.6 Sol was released by OpenAI on Jun 26 2026.
DeepSeek-V4-Flash is an open weight model released by DeepSeek. GPT-5.6 Sol is a proprietary model released by OpenAI.
Other comparisons
DeepSeek-V4-Flash vs Claude Fable 5GPT-5.6 Sol vs Claude Fable 5DeepSeek-V4-Flash vs Gemini OmniGPT-5.6 Sol vs Gemini OmniDeepSeek-V4-Flash vs Muse SparkGPT-5.6 Sol vs Muse SparkDeepSeek-V4-Flash vs Grok 4.3 BetaGPT-5.6 Sol vs Grok 4.3 BetaDeepSeek-V4-Flash vs Mistral Medium 3.5GPT-5.6 Sol vs Mistral Medium 3.5DeepSeek-V4-Flash vs Kimi K2.7 CodeGPT-5.6 Sol vs Kimi K2.7 Code