Model comparison
GPT-5.2 vs Grok 3 [Beta]
Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.2 #64 (Estimated); Grok 3 [Beta] #171 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.2 and Grok 3 [Beta] share 2 comparable benchmark results. 1 of 8 categories are comparable. 26 results are unique to GPT-5.2; 0 to Grok 3 [Beta].
Updated July 20, 2026- Shared results
- 2
- GPT-5.2 only
- 26
- Grok 3 [Beta] only
- 0
- Comparable categories
- 1 / 8
Pick GPT-5.2 if you want the stronger benchmark profile. Grok 3 [Beta] only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-5.2 is clearly ahead on the BenchAlign aggregate, 58.43 to 40.43. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.2's sharpest advantage is in mathematics, where it averages 35.2 against 2.8. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 40.700% to 3.793%.
GPT-5.2 is the reasoning model in the pair, while Grok 3 [Beta] is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. GPT-5.2 gives you the larger context window at 400K, compared with 128K for Grok 3 [Beta].
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-5.2 | Δ | Grok 3 [Beta] |
|---|---|---|---|
| Math | GPT-5.235.2 | Margin← 32.4 | Grok 3 [Beta]2.8 |
| Agentic | GPT-5.255.7 | MarginNo overlap | Grok 3 [Beta]Not measured |
| Coding | GPT-5.270.6 | MarginNo overlap | Grok 3 [Beta]Not measured |
| Reasoning | GPT-5.252.9 | MarginNo overlap | Grok 3 [Beta]Not measured |
| Knowledge | GPT-5.292.4 | MarginNo overlap | Grok 3 [Beta]Not measured |
| Multimodal | GPT-5.280.4 | MarginNo overlap | Grok 3 [Beta]Not measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 40.700%B 3.793%Winner: GPT-5.2Δ 36.9FrontierMath v2 (Tiers 1-3): GPT-5.2 scored 40.700%; Grok 3 [Beta] scored 3.793%. GPT-5.2 wins this benchmark. - Source ↗
FrontierMath v2 (Tier 4)
MathA 18.800%B 0.000%Winner: GPT-5.2Δ 18.8FrontierMath v2 (Tier 4): GPT-5.2 scored 18.800%; Grok 3 [Beta] scored 0.000%. GPT-5.2 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.2 | Grok 3 [Beta] | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.2$1.75 input / $14 output | Grok 3 [Beta]Not available | A complete price comparison is not available. |
| Generation speedtokens per second | GPT-5.273 tok/s | Grok 3 [Beta]Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.2130.34 s | Grok 3 [Beta]Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.2400K | Grok 3 [Beta]128K | GPT-5.2 lists the larger context window. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding4 benchmarks
Reasoning3 benchmarks
Knowledge7 benchmarks
| Benchmark | GPT-5.2 | Grok 3 [Beta] | Result |
|---|---|---|---|
| GPQASource | 92.4% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 42.2% | — | Not comparable |
| AA-GPQA DiamondSource | 90.3% | — | Not comparable |
| AA-HLESource | 35.4% | — | Not comparable |
| AA-Omniscience IndexSource | -1.0% | — | Not comparable |
| AA-Omniscience AccuracySource | 43.8% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 79.7% | — | Not comparable |
MathGPT-5.2 wins3 benchmarks
Multimodal5 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-5.2 | Grok 3 [Beta] | Result |
|---|---|---|---|
| AA-IFBenchSource | 75.4% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, GPT-5.2 or Grok 3 [Beta]?
GPT-5.2 is ahead on BenchLM's BenchAlign leaderboard, 58.43 to 40.43. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 40.700% and 3.793%.
Which is better for math, GPT-5.2 or Grok 3 [Beta]?
GPT-5.2 has the edge for math in this comparison, averaging 35.2 versus 2.8. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.
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