GPT-5-CodexvsGrok 4.3 Beta
GPT-5-Codex | Grok 4.3 Beta | |
|---|---|---|
| Benchmarks | ||
BullshitBench v2Nonsense detection — Given 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. | 39% | 50% |
| Overview | ||
| Company | OpenAI | SpaceXAI |
| Release date | Sep 15 2025 | Apr 17 2026 |
| Access | Proprietary | Proprietary |
Frequently asked questions
Grok 4.3 Beta leads GPT-5-Codex on 1 of the 1 benchmark they both report (BullshitBench v2). GPT-5-Codex shipped 214 days before Grok 4.3 Beta, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On BullshitBench v2, Grok 4.3 Beta leads at 50% vs GPT-5-Codex at 39%.
GPT-5-Codex was released by OpenAI on Sep 15 2025.
Grok 4.3 Beta was released by SpaceXAI on Apr 17 2026.
Other comparisons
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