Model comparison
GPT-5 Nano vs Grok-2 (Dec 2024)
GPT-5 Nano and Grok-2 (Dec 2024) score almost the same on the Noometry Index (33.5 vs 33.7), so choose on price, context window or the category you care about most.
Last verified . 23 shared benchmarks.
Summary
- They share 23 benchmarks with published results for both. GPT-5 Nano scores higher in 5 categories and Grok-2 (Dec 2024) in 3 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok-2 (Dec 2024) leads 48.6 to 39.1.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 81.1% for GPT-5 Nano and 11.5% for Grok-2 (Dec 2024).
Side by side
| GPT-5 Nano | Grok-2 (Dec 2024) | |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 33.5 | 33.7 |
| Released | 2025-08-07 | 2024-08-13 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $0.05 | — |
| Output $ / M tokens | $0.40 | — |
| Results tracked | 49 | 34 |
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Category by category
Coding Too close to call
GPT-5 Nano: 33.6 (#254), Grok-2 (Dec 2024): 33.3 (#258)
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| WeirdML | 38.1% | 22.2% |
| LMArena Coding | 1351 | 1287 |
| SWE-bench Verified (bash only) | 34.8% | — |
| LiveBench Coding | — | 46.4% |
| ALE-Bench | 718.67 | — |
Agentic & Tool Use Not comparable
GPT-5 Nano: 25.8 (#106), Grok-2 (Dec 2024): —
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| Terminal-Bench | 21.8% | — |
| Berkeley Function Calling Leaderboard | 51.5% | — |
Reasoning Too close to call
GPT-5 Nano: 16.3 (#306), Grok-2 (Dec 2024): 16.9 (#299)
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Hard Prompts | 1328 | 1272 |
| DTBench | 62.7% | 65.2% |
| Epoch Capabilities Index | 139.38 | 130.48 |
| ARC-AGI-2 | 2.6% | — |
| SimpleBench | — | 22.7% |
| Kagi LLM Benchmark | 62.2% | — |
| ARC-AGI-1 | 20.7% | — |
| Chess Puzzles | 27% | — |
| LiveBench Reasoning | — | 54.8% |
| Mystery Game Puzzles | 9% | — |
| LiveBench Data Analysis | — | 54.5% |
| LMCA | 7.9% | — |
| ForecastBench | 59.1 | — |
| LiveBench | — | 54.3% |
Math GPT-5 Nano leads
GPT-5 Nano: 29.4 (#241), Grok-2 (Dec 2024): 20.8 (#284)
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 81.1% | 11.5% |
| LMArena Math | 1317 | 1283 |
| MATH Level 5 | 95.2% | 63.5% |
| FrontierMath (Feb 2025 set) | 8.3% | 0.7% |
| FrontierMath (Tiers 1-3) | 20% | — |
| FrontierMath Tier 4 | 2.4% | — |
| ProofBench | 12% | — |
| Omni-MATH | 54.6% | — |
| LiveBench Math | — | 54.9% |
| FrontierMath Tier 4 (v1) | 2.1% | — |
Knowledge GPT-5 Nano leads
GPT-5 Nano: 35.9 (#178), Grok-2 (Dec 2024): 29.8 (#233)
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| GPQA Diamond | 69.4% | 53.8% |
| LMArena Expert | 1321 | 1254 |
| SimpleQA Verified | 11.7% | — |
| MMLU-Pro | 77.8% | — |
| Confabulations | — | 20.1% |
| Vectara Hallucination Rate | 10.5% | — |
| GPQA (HELM) | 67.9% | — |
Multimodal Not comparable
GPT-5 Nano: 31.3 (#108), Grok-2 (Dec 2024): —
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Vision | 1159 | — |
| VPCT | 37.2% | — |
Multilingual GPT-5 Nano leads
GPT-5 Nano: 45.3 (#172), Grok-2 (Dec 2024): 43.1 (#188)
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Non-English | 1313 | 1282 |
| LMArena Chinese | 1356 | 1289 |
| LMArena German | 1327 | 1287 |
| LMArena Japanese | 1226 | 1244 |
| LMArena Korean | 1269 | 1237 |
| LMArena Russian | 1296 | 1286 |
| LMArena Spanish | 1360 | 1281 |
| LMArena French | — | 1318 |
Instruction Following GPT-5 Nano leads
GPT-5 Nano: 75.0 (#79), Grok-2 (Dec 2024): 66.9 (#202)
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Instruction Following | 1306 | 1270 |
| LiveBench Instruction Following | — | 69.6% |
| IFEval | 93.2% | — |
Long Context Grok-2 (Dec 2024) leads
GPT-5 Nano: 31.3 (#281), Grok-2 (Dec 2024): 38.8 (#190)
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Longer Query | 1312 | 1276 |
| Fiction.LiveBench | 44.4% | — |
Writing & Preference Grok-2 (Dec 2024) leads
GPT-5 Nano: 39.1 (#249), Grok-2 (Dec 2024): 48.6 (#198)
| Benchmark | GPT-5 Nano | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Text | 1320 | 1305 |
| LMArena Creative Writing | 1249 | 1284 |
| LMArena Multi-Turn | 1311 | 1290 |
| Short-Story Creative Writing | — | 63.6% |
| EQ-Bench Creative Writing | 705 | — |
| WildBench | 80.6% | — |
| LiveBench Language | — | 45.6% |
Frequently asked questions
Is GPT-5 Nano better than Grok-2 (Dec 2024)?
GPT-5 Nano and Grok-2 (Dec 2024) score almost the same on the Noometry Index (33.5 vs 33.7), so choose on price, context window or the category you care about most.
Is GPT-5 Nano or Grok-2 (Dec 2024) better for coding?
They score almost the same on coding (33.6 vs 33.3); test both on your own repository before choosing.
How many benchmarks do GPT-5 Nano and Grok-2 (Dec 2024) share?
23 benchmarks have published results for both models. GPT-5 Nano has 49 scored results on Noometry and Grok-2 (Dec 2024) has 34.