# GPT-5.6 Terra vs Grok-2 (Dec 2024)

> GPT-5.6 Terra is the stronger model overall, scoring 59.2 to 33.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-6-terra-vs-grok-2
- Last updated: 2026-10-12
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. GPT-5.6 Terra scores higher in 8 categories and Grok-2 (Dec 2024) in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.6 Terra leads 81.6 to 20.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 99.7% for GPT-5.6 Terra and 11.5% for Grok-2 (Dec 2024).

## Snapshot

| | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 59.2 | 33.7 |
| Rank | 17 | 239 |
| Context | 1.05M | — |
| Input $/M | $2 | — |
| Output $/M | $12 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.6 Terra: 57.7 (#19)
- Grok-2 (Dec 2024): 33.3 (#258)

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| WeirdML | 78.3% | 22.2% |
| LMArena Coding | 1484 | 1287 |
| DeepSWE | 69.6% | — |
| FrontierCode | 41.3% | — |
| CursorBench | 41.3% | — |
| LMArena WebDev | 1522 | — |
| SciCode | 55% | — |
| LiveBench Coding | — | 46.4% |
| ALE-Bench | 1,951 | — |

## Agentic & Tool Use

- GPT-5.6 Terra: 40.1 (#25)
- Grok-2 (Dec 2024): —

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| APEX-Agents | 58.2% | — |
| BALROG | 53.2% | — |
| GDP.pdf | 24.7% | — |
| Vending-Bench 2 | 7,343 | — |

## Reasoning

- GPT-5.6 Terra: 60.7 (#21)
- Grok-2 (Dec 2024): 16.9 (#299)

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| SimpleBench | 48.9% | 22.7% |
| LMArena Hard Prompts | 1468 | 1272 |
| DTBench | 93.3% | 65.2% |
| Epoch Capabilities Index | 159.62 | 130.48 |
| ARC-AGI-2 | 83.9% | — |
| Kagi LLM Benchmark | 51.3% | — |
| NYT Connections (extended) | 78.4% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30% | — |
| Chess Puzzles | 54% | — |
| LiveBench Reasoning | — | 54.8% |
| Mystery Game Puzzles | 35% | — |
| LiveBench Data Analysis | — | 54.5% |
| LMCA | 55% | — |
| Surface Evolver Bench | 83.8% | — |
| LiveBench | — | 54.3% |

## Math

- GPT-5.6 Terra: 81.6 (#12)
- Grok-2 (Dec 2024): 20.8 (#284)

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 99.7% | 11.5% |
| LMArena Math | 1466 | 1283 |
| FrontierMath (Tiers 1-3) | 86% | — |
| FrontierMath Tier 4 | 70.7% | — |
| ProofBench | 74% | — |
| LiveBench Math | — | 54.9% |
| MATH Level 5 | — | 63.5% |
| FrontierMath (Feb 2025 set) | — | 0.7% |

## Knowledge

- GPT-5.6 Terra: 61.2 (#30)
- Grok-2 (Dec 2024): 29.8 (#233)

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| GPQA Diamond | 93.3% | 53.8% |
| LMArena Expert | 1492 | 1254 |
| SimpleQA Verified | 43.2% | — |
| Confabulations | — | 20.1% |

## Multimodal

- GPT-5.6 Terra: 47.3 (#11)
- Grok-2 (Dec 2024): —

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Vision | 1271 | — |
| Blueprint-Bench 2 | 30.8% | — |
| Furniture Assembly | 54.2% | — |
| LMArena Document | 1472 | — |

## Multilingual

- GPT-5.6 Terra: 54.4 (#44)
- Grok-2 (Dec 2024): 43.1 (#188)

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Non-English | 1439 | 1282 |
| LMArena Chinese | 1513 | 1289 |
| LMArena French | 1471 | 1318 |
| LMArena German | 1460 | 1287 |
| LMArena Japanese | 1457 | 1244 |
| LMArena Korean | 1425 | 1237 |
| LMArena Russian | 1450 | 1286 |
| LMArena Spanish | 1448 | 1281 |

## Instruction Following

- GPT-5.6 Terra: 76.4 (#40)
- Grok-2 (Dec 2024): 66.9 (#202)

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Instruction Following | 1454 | 1270 |
| LiveBench Instruction Following | — | 69.6% |

## Long Context

- GPT-5.6 Terra: 44.4 (#68)
- Grok-2 (Dec 2024): 38.8 (#190)

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Longer Query | 1451 | 1276 |

## Writing & Preference

- GPT-5.6 Terra: 70.2 (#23)
- Grok-2 (Dec 2024): 48.6 (#198)

| Benchmark | GPT-5.6 Terra | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Text | 1447 | 1305 |
| LMArena Creative Writing | 1410 | 1284 |
| LMArena Multi-Turn | 1449 | 1290 |
| Short-Story Creative Writing | — | 63.6% |
| EQ-Bench Creative Writing | 1855 | — |
| EQ-Bench 4 | 1234 | — |
| LiveBench Language | — | 45.6% |

## FAQ

### Is GPT-5.6 Terra better than Grok-2 (Dec 2024)?

GPT-5.6 Terra is the stronger model overall, scoring 59.2 to 33.7 on the Noometry Index.

### Is GPT-5.6 Terra or Grok-2 (Dec 2024) better for coding?

GPT-5.6 Terra scores higher on coding benchmarks: 57.7 versus 33.3 in the Noometry coding category.

### How many benchmarks do GPT-5.6 Terra and Grok-2 (Dec 2024) share?

23 benchmarks have published results for both models. GPT-5.6 Terra has 52 scored results on Noometry and Grok-2 (Dec 2024) has 34.