Model comparison
GPT-5.4 Pro vs Grok 4.6
GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 56.8 on the Noometry Index. Grok 4.6 costs 23× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Last verified . 11 shared benchmarks.
Summary
- They share 11 benchmarks with published results for both. GPT-5.4 Pro scores higher in 3 categories and Grok 4.6 in 1 category; 4 gaps are clear of the uncertainty.
- The widest gap is in coding, where Grok 4.6 leads 58.0 to 42.6.
- The biggest single-benchmark swing is FrontierMath Tier 4: 58.5% for GPT-5.4 Pro and 31.7% for Grok 4.6.
- Grok 4.6 is cheaper at $2 / $6 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 500K.
Side by side
| GPT-5.4 Pro | Grok 4.6 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 58.8 | 56.8 |
| Released | 2026-03-05 | 2026-08-12 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 500K |
| Max output | 128K | 500K |
| Input $ / M tokens | $30 | $2 |
| Output $ / M tokens | $180 | $6 |
| Results tracked | 16 | 49 |
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Category by category
Coding Grok 4.6 leads
GPT-5.4 Pro: 42.6 (#89), Grok 4.6: 58.0 (#14)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| WeirdML | 57.4% | 67.3% |
| DeepSWE | — | 67.5% |
| FrontierCode | — | 48% |
| CursorBench | — | 41.4% |
| LMArena WebDev | — | 1620 |
| FrontierSWE | — | 25.3% |
| SciCode | — | 56.5% |
| LMArena Coding | — | 1464 |
| ALE-Bench | — | 1,508 |
Agentic & Tool Use Not comparable
GPT-5.4 Pro: —, Grok 4.6: 39.4 (#25)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| APEX-Agents | — | 65.3% |
| GDP.pdf | — | 17.2% |
| Vending-Bench 2 | — | 9,047 |
Reasoning GPT-5.4 Pro leads
GPT-5.4 Pro: 71.0 (#10), Grok 4.6: 61.3 (#18)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| ARC-AGI-2 | 83.3% | 67.1% |
| SimpleBench | 74.1% | 75.9% |
| ARC-AGI-1 | 94.5% | 87.5% |
| CritPt | 30% | 19.7% |
| Chess Puzzles | 58.6% | 40% |
| Epoch Capabilities Index | 159.12 | 156.48 |
| NYT Connections (extended) | — | 80% |
| EnigmaEval | 23.8% | — |
| EBR-Bench | — | 30.5% |
| LMArena Hard Prompts | — | 1445 |
| Mystery Game Puzzles | — | 34% |
| DTBench | — | 97.3% |
| LMCA | — | 48.5% |
Math GPT-5.4 Pro leads
GPT-5.4 Pro: 72.0 (#17), Grok 4.6: 66.8 (#19)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | 66% |
| FrontierMath Tier 4 | 58.5% | 31.7% |
| OTIS Mock AIME 2024-2025 | — | 99.2% |
| ProofBench | — | 51% |
| LMArena Math | — | 1416 |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |
Knowledge GPT-5.4 Pro leads
GPT-5.4 Pro: 68.3 (#6), Grok 4.6: 63.3 (#18)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| GPQA Diamond | 94.6% | 94% |
| SimpleQA Verified | 46.3% | 49.3% |
| Humanity's Last Exam | 44.3% | — |
| Vectara Hallucination Rate | 8.3% | — |
| LMArena Expert | — | 1463 |
Multimodal Not comparable
GPT-5.4 Pro: —, Grok 4.6: 43.9 (#18)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| LMArena Vision | — | 1265 |
| Blueprint-Bench 2 | — | 33.2% |
| Furniture Assembly | — | 40% |
| LMArena Document | — | 1452 |
Multilingual Not comparable
GPT-5.4 Pro: —, Grok 4.6: 53.3 (#67)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| LMArena Non-English | — | 1422 |
| LMArena Chinese | — | 1479 |
| LMArena French | — | 1458 |
| LMArena German | — | 1425 |
| LMArena Japanese | — | 1383 |
| LMArena Korean | — | 1395 |
| LMArena Russian | — | 1427 |
| LMArena Spanish | — | 1408 |
Instruction Following Not comparable
GPT-5.4 Pro: —, Grok 4.6: 75.6 (#59)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| LMArena Instruction Following | — | 1431 |
Long Context Not comparable
GPT-5.4 Pro: —, Grok 4.6: 44.4 (#62)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| LMArena Longer Query | — | 1453 |
Writing & Preference Not comparable
GPT-5.4 Pro: —, Grok 4.6: 62.5 (#77)
| Benchmark | GPT-5.4 Pro | Grok 4.6 |
|---|---|---|
| LMArena Text | — | 1427 |
| LMArena Creative Writing | — | 1430 |
| LMArena Multi-Turn | — | 1422 |
Frequently asked questions
Is GPT-5.4 Pro better than Grok 4.6?
GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 56.8 on the Noometry Index. Grok 4.6 costs 23× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.4 Pro or Grok 4.6?
Grok 4.6 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; GPT-5.4 Pro lists at $30 and $180.
Is GPT-5.4 Pro or Grok 4.6 better for coding?
Grok 4.6 scores higher on coding benchmarks: 58.0 versus 42.6 in the Noometry coding category.
Which has the bigger context window?
GPT-5.4 Pro does, with 1.05M tokens against 500K.
How many benchmarks do GPT-5.4 Pro and Grok 4.6 share?
11 benchmarks have published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and Grok 4.6 has 49.