GPT-5.2 vs Grok 4 Fast
OpenAI GPT-5.2 | SpaceXAI Grok 4 Fast | |
|---|---|---|
| Overview | ||
| Company | OpenAI | SpaceXAI |
| Release date | Dec 11 2025 | Sep 2025 |
| Access | Proprietary | 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. | 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. | 80% | — |
Abstract reasoning ARC-AGI-2Puzzle-style tests of abstract reasoning and pattern-finding — the kind of thing people find easy but AIs often struggle with. Higher is better. | 52.9% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 92.4% | — |
Community preference Arena Elo (Text)Real people chat with two anonymous AIs side by side and vote for the answer they prefer. Votes become a chess-style Elo rating on arena.ai — it measures which AI people actually like, not test scores. Higher is better. | 1476 | — |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | 1405 | — |
| Timeline | ||
| Release gap | Grok 4 Fast shipped 101 days before GPT-5.2 | |
Which is better: GPT-5.2 or Grok 4 Fast?
GPT-5.2 and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok 4 Fast shipped 101 days before GPT-5.2, 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.
Direct benchmark comparisons are unavailable — GPT-5.2 and Grok 4 Fast don't publish scores on any of the same benchmarks.
Frequently asked questions
GPT-5.2 was released by OpenAI on Dec 11 2025.
Grok 4 Fast was released by SpaceXAI on Sep 2025.
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