Model comparison
GPT-5.5 Pro vs Grok 4.7
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 53.1 on the Noometry Index. Grok 4.7 costs 23× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Last verified . 9 shared benchmarks.
Summary
- They share 9 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and Grok 4.7 in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 57.8.
- The biggest single-benchmark swing is FrontierMath Tier 4: 78% for GPT-5.5 Pro and 17.1% for Grok 4.7.
- Grok 4.7 is cheaper at $2 / $6 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 500K.
Side by side
| GPT-5.5 Pro | Grok 4.7 | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 64.3 | 53.1 |
| Released | 2026-04-23 | 2026-09-21 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 500K |
| Max output | 128K | 500K |
| Input $ / M tokens | $30 | $2 |
| Output $ / M tokens | $180 | $6 |
| Results tracked | 14 | 39 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
GPT-5.5 Pro: —, Grok 4.7: 58.0 (#18)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| FrontierCode | — | 47.6% |
| CursorBench | — | 46.3% |
| LMArena WebDev | — | 1639 |
| FrontierSWE | — | 29.5% |
| SciCode | — | 57.8% |
| LMArena Coding | — | 1427 |
Agentic & Tool Use Not comparable
GPT-5.5 Pro: —, Grok 4.7: 36.7 (#37)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| APEX-Agents | — | 54.6% |
| GDP.pdf | — | 22.8% |
| Vending-Bench 2 | — | 10,537 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Grok 4.7: 49.1 (#40)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| CritPt | 30.6% | 18% |
| Chess Puzzles | 64% | 38% |
| DTBench | 96% | 96% |
| LMCA | 53.9% | 49.4% |
| Epoch Capabilities Index | 162.07 | 153.53 |
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| NYT Connections (extended) | — | 76.8% |
| ARC-AGI-1 | 96.5% | — |
| LMArena Hard Prompts | — | 1413 |
| Mystery Game Puzzles | — | 29% |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), Grok 4.7: 57.8 (#39)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | 53% |
| FrontierMath Tier 4 | 78% | 17.1% |
| OTIS Mock AIME 2024-2025 | 100% | 98.1% |
| ProofBench | — | 34% |
| LMArena Math | — | 1407 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.1 (#19), Grok 4.7: 62.8 (#22)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| GPQA Diamond | 93.9% | 92.7% |
| SimpleQA Verified | — | 56% |
| LMArena Expert | — | 1422 |
Multimodal Not comparable
GPT-5.5 Pro: —, Grok 4.7: 35.5 (#87)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| LMArena Vision | — | 1228 |
| Blueprint-Bench 2 | — | 32.5% |
| Furniture Assembly | — | 20.8% |
Multilingual Not comparable
GPT-5.5 Pro: —, Grok 4.7: 50.8 (#116)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| LMArena Non-English | — | 1389 |
| LMArena Chinese | — | 1455 |
| LMArena French | — | 1455 |
| LMArena Russian | — | 1397 |
| LMArena Spanish | — | 1400 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Grok 4.7: 74.1 (#105)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| LMArena Instruction Following | — | 1404 |
Long Context Not comparable
GPT-5.5 Pro: —, Grok 4.7: 43.1 (#104)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| LMArena Longer Query | — | 1413 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Grok 4.7: 70.0 (#24)
| Benchmark | GPT-5.5 Pro | Grok 4.7 |
|---|---|---|
| LMArena Text | — | 1399 |
| LMArena Creative Writing | — | 1391 |
| EQ-Bench Creative Writing | — | 2007 |
| LMArena Multi-Turn | — | 1393 |
Frequently asked questions
Is GPT-5.5 Pro better than Grok 4.7?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 53.1 on the Noometry Index. Grok 4.7 costs 23× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.5 Pro or Grok 4.7?
Grok 4.7 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; GPT-5.5 Pro lists at $30 and $180.
Which has the bigger context window?
GPT-5.5 Pro does, with 1.05M tokens against 500K.
How many benchmarks do GPT-5.5 Pro and Grok 4.7 share?
9 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Grok 4.7 has 39.