Model comparison
GPT-4o vs Grok 4
Head-to-head evidence from 12 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-4o #165 (Supported); Grok 4 #50 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-4o and Grok 4 share 12 comparable benchmark results. 1 of 8 categories are comparable. 1 result is unique to GPT-4o; 4 to Grok 4.
Updated July 20, 2026- Shared results
- 12
- GPT-4o only
- 1
- Grok 4 only
- 4
- Comparable categories
- 1 / 8
Pick Grok 4 if you want the stronger benchmark profile. GPT-4o only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Confidence note. This is a partial-evidence comparison with 12 shared benchmark results across 6 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Grok 4 is clearly ahead on the BenchAlign aggregate, 60.42 to 41.49. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4's sharpest advantage is in mathematics, where it averages 15.3 against 0.3. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 0.345% to 19.655%.
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-4o | Δ | Grok 4 |
|---|---|---|---|
| Math | GPT-4o0.3 | Margin→ 15.0 | Grok 415.3 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 0.345%B 19.655%Winner: Grok 4Δ 19.3FrontierMath v2 (Tiers 1-3): GPT-4o scored 0.345%; Grok 4 scored 19.655%. Grok 4 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-4o | Grok 4 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-4o$2.5 input / $10 output | Grok 4Not available | A complete price comparison is not available. |
| Generation speedtokens per second | GPT-4o131 tok/s | Grok 454 tok/s | GPT-4o has the higher measured throughput. |
| First-answer latencyseconds to first token | GPT-4o0.81 s | Grok 415.60 s | GPT-4o reaches the first token sooner. |
| Context windowmaximum listed tokens | GPT-4o128K | Grok 4128K | Listed context windows are equal. |
Benchmark Deep Dive
Agentic2 benchmarks
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | GPT-4o | Grok 4 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 11.2% | 33.3% | Grok 4 leads |
| AA-GPQA DiamondSource | 54.3% | 87.7% | Grok 4 leads |
| AA-HLESource | 3.3% | 23.9% | Grok 4 leads |
| AA-Omniscience IndexSource | -10.7% | 3.8% | Grok 4 leads |
| AA-Omniscience AccuracySource | 19.7% | 41.4% | Grok 4 leads |
| AA-Omniscience Hallucination RateSource | 37.9% | 64.2% | GPT-4o leads |
MathGrok 4 wins2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-4o | Grok 4 | Result |
|---|---|---|---|
| AA-IFBenchSource | 34.3% | 53.7% | Grok 4 leads |
Frequently Asked Questions (2)
Which is better, GPT-4o or Grok 4?
Grok 4 is ahead on BenchLM's BenchAlign leaderboard, 60.42 to 41.49. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 0.345% and 19.655%.
Which is better for math, GPT-4o or Grok 4?
Grok 4 has the edge for math in this comparison, averaging 15.3 versus 0.3. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.
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