DeepSeek R1-0528 vs GPT-5.3-Codex-Spark
DeepSeek DeepSeek R1-0528 | OpenAI GPT-5.3-Codex-Spark | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | May 28 2025 | Feb 12 2026 |
| Access | Open Weight | Proprietary |
| Specifications | ||
Context window | — | 128k |
| 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. | 8% | — |
| Timeline | ||
| Release gap | DeepSeek R1-0528 shipped 260 days before GPT-5.3-Codex-Spark | |
Which is better: DeepSeek R1-0528 or GPT-5.3-Codex-Spark?
DeepSeek R1-0528 and GPT-5.3-Codex-Spark don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek R1-0528 shipped 260 days before GPT-5.3-Codex-Spark, so benchmark comparisons should account for the intervening progress.
DeepSeek R1-0528 is open weight, while GPT-5.3-Codex-Spark is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek R1-0528 and GPT-5.3-Codex-Spark don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek R1-0528 was released by DeepSeek on May 28 2025.
GPT-5.3-Codex-Spark was released by OpenAI on Feb 12 2026.
DeepSeek R1-0528 is an open weight model released by DeepSeek. GPT-5.3-Codex-Spark is a proprietary model released by OpenAI.
Other comparisons
DeepSeek R1-0528 vs Claude Sonnet 5GPT-5.3-Codex-Spark vs Claude Sonnet 5DeepSeek R1-0528 vs Gemini OmniGPT-5.3-Codex-Spark vs Gemini OmniDeepSeek R1-0528 vs Muse Spark 1.1GPT-5.3-Codex-Spark vs Muse Spark 1.1DeepSeek R1-0528 vs Grok 4.5GPT-5.3-Codex-Spark vs Grok 4.5DeepSeek R1-0528 vs Mistral Medium 3.5GPT-5.3-Codex-Spark vs Mistral Medium 3.5DeepSeek R1-0528 vs Kimi K2.7 CodeGPT-5.3-Codex-Spark vs Kimi K2.7 Code