Model comparison
GPT-5.6 Terra vs Grok-3 mini
GPT-5.6 Terra is the stronger model overall, scoring 59.2 to 41.2 on the Noometry Index.
Last verified . 24 shared benchmarks.
Summary
- They share 24 benchmarks with published results for both. GPT-5.6 Terra scores higher in 7 categories and Grok-3 mini in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.6 Terra leads 60.7 to 13.6.
- The biggest single-benchmark swing is ARC-AGI-2: 83.9% for GPT-5.6 Terra and 0.4% for Grok-3 mini.
Side by side
| GPT-5.6 Terra | Grok-3 mini | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 59.2 | 41.2 |
| Released | 2026-07-09 | 2025-04-09 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $12 | — |
| Results tracked | 52 | 35 |
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Category by category
Coding GPT-5.6 Terra leads
GPT-5.6 Terra: 57.7 (#19), Grok-3 mini: 40.8 (#131)
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| WeirdML | 78.3% | 42.6% |
| LMArena Coding | 1484 | 1379 |
| DeepSWE | 69.6% | — |
| FrontierCode | 41.3% | — |
| Aider Polyglot | — | 49.3% |
| CursorBench | 41.3% | — |
| LMArena WebDev | 1522 | — |
| SciCode | 55% | — |
| ALE-Bench | 1,951 | — |
Agentic & Tool Use Not comparable
GPT-5.6 Terra: 40.1 (#25), Grok-3 mini: —
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| APEX-Agents | 58.2% | — |
| BALROG | 53.2% | — |
| GDP.pdf | 24.7% | — |
| Vending-Bench 2 | 7,343 | — |
Reasoning GPT-5.6 Terra leads
GPT-5.6 Terra: 60.7 (#21), Grok-3 mini: 13.6 (#334)
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| ARC-AGI-2 | 83.9% | 0.4% |
| Kagi LLM Benchmark | 51.3% | 61.3% |
| ARC-AGI-1 | 96.5% | 16.5% |
| LMArena Hard Prompts | 1468 | 1375 |
| Epoch Capabilities Index | 159.62 | 140.35 |
| SimpleBench | 48.9% | — |
| NYT Connections (extended) | 78.4% | — |
| CritPt | 30% | — |
| Chess Puzzles | 54% | — |
| Mystery Game Puzzles | 35% | — |
| DTBench | 93.3% | — |
| LMCA | 55% | — |
| Surface Evolver Bench | 83.8% | — |
Math GPT-5.6 Terra leads
GPT-5.6 Terra: 81.6 (#12), Grok-3 mini: 42.1 (#85)
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 99.7% | 77.8% |
| LMArena Math | 1466 | 1386 |
| FrontierMath (Tiers 1-3) | 86% | — |
| FrontierMath Tier 4 | 70.7% | — |
| ProofBench | 74% | — |
| Omni-MATH | — | 31.8% |
| MATH Level 5 | — | 90.9% |
| FrontierMath (Feb 2025 set) | — | 5.9% |
Knowledge GPT-5.6 Terra leads
GPT-5.6 Terra: 61.2 (#30), Grok-3 mini: 46.4 (#81)
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| GPQA Diamond | 93.3% | 76.3% |
| LMArena Expert | 1492 | 1395 |
| SimpleQA Verified | 43.2% | — |
| MMLU-Pro | — | 79.9% |
| Confabulations | — | 10.8% |
| GPQA (HELM) | — | 67.5% |
Multimodal Not comparable
GPT-5.6 Terra: 47.3 (#11), Grok-3 mini: —
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| LMArena Vision | 1271 | — |
| Blueprint-Bench 2 | 30.8% | — |
| Furniture Assembly | 54.2% | — |
| LMArena Document | 1472 | — |
Multilingual GPT-5.6 Terra leads
GPT-5.6 Terra: 54.4 (#44), Grok-3 mini: 48.1 (#145)
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| LMArena Non-English | 1439 | 1352 |
| LMArena Chinese | 1513 | 1387 |
| LMArena French | 1471 | 1357 |
| LMArena German | 1460 | 1349 |
| LMArena Japanese | 1457 | 1342 |
| LMArena Korean | 1425 | 1335 |
| LMArena Russian | 1450 | 1353 |
| LMArena Spanish | 1448 | 1381 |
Instruction Following Grok-3 mini leads
GPT-5.6 Terra: 76.4 (#40), Grok-3 mini: 78.5 (#9)
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| LMArena Instruction Following | 1454 | 1357 |
| IFEval | — | 95.1% |
Long Context GPT-5.6 Terra leads
GPT-5.6 Terra: 44.4 (#68), Grok-3 mini: 41.0 (#147)
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| LMArena Longer Query | 1451 | 1372 |
| Fiction.LiveBench | — | 66.7% |
Writing & Preference GPT-5.6 Terra leads
GPT-5.6 Terra: 70.2 (#23), Grok-3 mini: 52.5 (#169)
| Benchmark | GPT-5.6 Terra | Grok-3 mini |
|---|---|---|
| LMArena Text | 1447 | 1370 |
| LMArena Creative Writing | 1410 | 1342 |
| LMArena Multi-Turn | 1449 | 1355 |
| Short-Story Creative Writing | — | 73.5% |
| EQ-Bench Creative Writing | 1855 | — |
| WildBench | — | 65.1% |
| EQ-Bench 4 | 1234 | — |
Frequently asked questions
Is GPT-5.6 Terra better than Grok-3 mini?
GPT-5.6 Terra is the stronger model overall, scoring 59.2 to 41.2 on the Noometry Index.
Is GPT-5.6 Terra or Grok-3 mini better for coding?
GPT-5.6 Terra scores higher on coding benchmarks: 57.7 versus 40.8 in the Noometry coding category.
How many benchmarks do GPT-5.6 Terra and Grok-3 mini share?
24 benchmarks have published results for both models. GPT-5.6 Terra has 52 scored results on Noometry and Grok-3 mini has 35.