GPT-5.2vsGrok 4.20 Beta
GPT-5.2 | Grok 4.20 Beta | |
|---|---|---|
| API pricingUSD per 1M tokens · lower wins · base tier | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $1.75 | $1.25 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | $14.00 | $2.50 |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | $0.175 | $0.20 |
| 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. | 38% | 56% |
ARC-AGI-2Abstract reasoning — Puzzle-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% | 53.3% |
Arena Elo (Text)Community preference — 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 | 1475 |
| BenchmarksPublished by one model only | ||
SWE-Bench VerifiedCoding — Real 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% | — |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 92.4% | — |
Arena Elo (Code)Community preference (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. | 1419 | — |
| Overview | ||
| Company | OpenAI | SpaceXAI |
| Release date | Dec 11 2025 | Feb 17 2026 |
| Access | Proprietary | Proprietary |
Frequently asked questions
Grok 4.20 Beta leads GPT-5.2 on 2 of the 3 benchmarks they both report (BullshitBench v2, ARC-AGI-2, Arena Elo (Text)). Grok 4.20 Beta is cheaper on both input and output: $1.25 vs $1.75 per million input tokens, and $2.50 vs $14.00 per million output tokens. Figures are base-tier rates. GPT-5.2 shipped 68 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 GPT-5.2 at 38%. On ARC-AGI-2, Grok 4.20 Beta leads at 53.3% vs GPT-5.2 at 52.9%. On Arena Elo (Text), GPT-5.2 leads at 1476 vs Grok 4.20 Beta at 1475.
GPT-5.2 was released by OpenAI on Dec 11 2025.
Grok 4.20 Beta was released by SpaceXAI on Feb 17 2026.
Grok 4.20 Beta leads on ARC-AGI-2 — GPT-5.2 52.9% vs Grok 4.20 Beta 53.3%.
Grok 4.20 Beta is cheaper on both input and output: $1.25 vs $1.75 per million input tokens, and $2.50 vs $14.00 per million output tokens. Figures are base-tier rates. Rates are pay-as-you-go API prices verified on August 18, 2026.