o3vsGrok 4.20 Beta
o3 | Grok 4.20 Beta | |
|---|---|---|
| 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. | 26% | 56%Best |
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. | — | 53.3% |
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. | — | 1475 |
| Overview | ||
| Company | OpenAI | SpaceXAI |
| Release date | Apr 16 2025 | Feb 17 2026 |
| Access | Proprietary | Proprietary |
Which is better: o3 or Grok 4.20 Beta?
Grok 4.20 Beta leads o3 on 1 of the 1 benchmark they both report (BullshitBench v2). o3 shipped 307 days before Grok 4.20 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 4.20 Beta leads at 56% vs o3 at 26%.
Frequently asked questions
o3 was released by OpenAI on Apr 16 2025.
Grok 4.20 Beta was released by SpaceXAI on Feb 17 2026.
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