Model comparison
GPT-5 vs Llama 3.1-405B
GPT-5 is the stronger model overall, scoring 50.9 to 30.7 on the Noometry Index.
Last verified . 33 shared benchmarks.
MetaSummary
- They share 33 benchmarks with published results for both. GPT-5 scores higher in 9 categories and Llama 3.1-405B in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5 leads 55.0 to 18.4.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 91.4% for GPT-5 and 9.7% for Llama 3.1-405B.
- Llama 3.1-405B has downloadable open weights; the other is API-only.
Side by side
| GPT-5 | Llama 3.1-405B | |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 50.9 | 30.7 |
| Released | 2025-08-07 | 2024-07-23 |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 69 | 42 |
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Category by category
Coding GPT-5 leads
GPT-5: 50.3 (#47), Llama 3.1-405B: 33.1 (#262)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| WeirdML | 60.7% | 21.4% |
| LMArena Coding | 1436 | 1291 |
| SWE-bench Verified | 73.6% | — |
| SWE-bench Verified (bash only) | 65% | — |
| Aider Polyglot | 88% | — |
| LMArena WebDev | 1418 | — |
| SciCode | 42.9% | — |
| GSO | 6.9% | — |
| ALE-Bench | 1,162 | — |
| AlgoTune | 1.67 | — |
Agentic & Tool Use GPT-5 leads
GPT-5: 33.1 (#56), Llama 3.1-405B: 21.0 (#140)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| Terminal-Bench | 49.6% | — |
| GDPval | 34.8% | — |
| Remote Labor Index | 1.7% | — |
| TheAgentCompany | — | 7.4% |
| Cybench | — | 7.5% |
| DeepResearch Bench | 49.6% | — |
| BALROG | 32.8% | — |
| LMArena Search | 1133 | — |
| METR Time Horizons | 69.6% | — |
Reasoning GPT-5 leads
GPT-5: 38.3 (#64), Llama 3.1-405B: 16.8 (#300)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| SimpleBench | 56.7% | 23% |
| Kagi LLM Benchmark | 72.7% | 45% |
| LMArena Hard Prompts | 1416 | 1269 |
| DTBench | 90.7% | 61.4% |
| Epoch Capabilities Index | 150 | 128.75 |
| ForecastBench | 61.4 | 59.9 |
| ARC-AGI-2 | 9.9% | — |
| ARC-AGI-1 | 65.7% | — |
| CritPt | 12.6% | — |
| Chess Puzzles | 37% | — |
| EnigmaEval | 10.5% | — |
| EBR-Bench | 12.7% | — |
| Mystery Game Puzzles | 23% | — |
| LMCA | 40% | — |
| BIG-Bench Hard | — | 82.9% |
| HellaSwag | — | 89.2% |
| PIQA | — | 85.9% |
| WinoGrande | — | 89.2% |
Math GPT-5 leads
GPT-5: 55.0 (#44), Llama 3.1-405B: 18.4 (#290)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 91.4% | 9.7% |
| Omni-MATH | 64.7% | 24.9% |
| LMArena Math | 1407 | 1281 |
| MATH Level 5 | 98.1% | 49.8% |
| FrontierMath (Tiers 1-3) | 55.4% | — |
| FrontierMath Tier 4 | 22% | — |
| ProofBench | 18% | — |
| FrontierMath (Feb 2025 set) | 32.4% | — |
| FrontierMath Tier 4 (v1) | 12.5% | — |
Knowledge GPT-5 leads
GPT-5: 56.6 (#43), Llama 3.1-405B: 30.4 (#227)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| GPQA Diamond | 86.2% | 50.9% |
| MMLU-Pro | 86.3% | 72.3% |
| Confabulations | 10.3% | 17.6% |
| GPQA (HELM) | 79.2% | 52.2% |
| LMArena Expert | 1419 | 1243 |
| Humanity's Last Exam | 25.3% | — |
| SimpleQA Verified | 50.1% | — |
| Vectara Hallucination Rate | 14.7% | — |
| ARC (AI2) Challenge | — | 95.3% |
| MMLU | — | 84.5% |
| TriviaQA | — | 82.7% |
Multimodal Not comparable
GPT-5: 46.8 (#13), Llama 3.1-405B: —
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| LMArena Vision | 1232 | — |
| GeoBench | 81% | — |
| VPCT | 66% | — |
Multilingual GPT-5 leads
GPT-5: 51.4 (#110), Llama 3.1-405B: 40.7 (#214)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| LMArena Non-English | 1397 | 1248 |
| LMArena Chinese | 1422 | 1242 |
| LMArena French | 1410 | 1279 |
| LMArena German | 1416 | 1252 |
| LMArena Japanese | 1409 | 1208 |
| LMArena Korean | 1360 | 1184 |
| LMArena Russian | 1406 | 1265 |
| LMArena Spanish | 1399 | 1260 |
Instruction Following GPT-5 leads
GPT-5: 73.8 (#113), Llama 3.1-405B: 65.9 (#214)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| IFEval | 87.5% | 81.1% |
| LMArena Instruction Following | 1388 | 1259 |
Long Context GPT-5 leads
GPT-5: 69.5 (#2), Llama 3.1-405B: 38.4 (#197)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| LMArena Longer Query | 1399 | 1266 |
| Fiction.LiveBench | 97.2% | — |
Writing & Preference GPT-5 leads
GPT-5: 63.4 (#65), Llama 3.1-405B: 38.9 (#251)
| Benchmark | GPT-5 | Llama 3.1-405B |
|---|---|---|
| LMArena Text | 1406 | 1284 |
| LMArena Creative Writing | 1365 | 1262 |
| EQ-Bench Creative Writing | 1627 | 870 |
| WildBench | 85.7% | 78.3% |
| LMArena Multi-Turn | 1426 | 1297 |
| Short-Story Creative Writing | 86% | — |
Frequently asked questions
Is GPT-5 better than Llama 3.1-405B?
GPT-5 is the stronger model overall, scoring 50.9 to 30.7 on the Noometry Index.
Is GPT-5 or Llama 3.1-405B better for coding?
GPT-5 scores higher on coding benchmarks: 50.3 versus 33.1 in the Noometry coding category.
How many benchmarks do GPT-5 and Llama 3.1-405B share?
33 benchmarks have published results for both models. GPT-5 has 69 scored results on Noometry and Llama 3.1-405B has 42.