Model comparison
GPT-5.4 nano vs Molmo 2 8b
GPT-5.4 nano is the stronger model overall, scoring 41.9 to 39.1 on the Noometry Index.
Last verified . 5 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 5 benchmarks with published results for both. GPT-5.4 nano scores higher in 4 categories and Molmo 2 8b in 1 category; 5 gaps are clear of the uncertainty.
- The widest gap is in multimodal, where GPT-5.4 nano leads 36.7 to 30.2.
- Molmo 2 8b has downloadable open weights; the other is API-only.
Side by side
| GPT-5.4 nano | Molmo 2 8b | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 41.9 | 39.1 |
| Released | 2026-03-17 | — |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $0.20 | — |
| Output $ / M tokens | $1.25 | — |
| Results tracked | 40 | 5 |
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Category by category
Coding Not comparable
GPT-5.4 nano: 43.6 (#84), Molmo 2 8b: —
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| SciCode | 46.9% | — |
| WeirdML | 49.2% | — |
| LMArena Coding | 1405 | — |
| ALE-Bench | 1,005 | — |
Reasoning Molmo 2 8b leads
GPT-5.4 nano: 23.7 (#173), Molmo 2 8b: 25.6 (#146)
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1381 | 1287 |
| ARC-AGI-2 | 5.7% | — |
| Kagi LLM Benchmark | 39.7% | — |
| ARC-AGI-1 | 51.5% | — |
| CritPt | 9.3% | — |
| Chess Puzzles | 30% | — |
| Mystery Game Puzzles | 9% | — |
| DTBench | 80.3% | — |
| LMCA | 36.9% | — |
| Epoch Capabilities Index | 145.81 | — |
| ForecastBench | 57.3 | — |
Math Not comparable
GPT-5.4 nano: 40.9 (#88), Molmo 2 8b: —
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| FrontierMath (Tiers 1-3) | 44.9% | — |
| FrontierMath Tier 4 | 12.2% | — |
| OTIS Mock AIME 2024-2025 | 87.8% | — |
| ProofBench | 5% | — |
| LMArena Math | 1406 | — |
| FrontierMath (Feb 2025 set) | 25.9% | — |
| FrontierMath Tier 4 (v1) | 6.3% | — |
Knowledge Not comparable
GPT-5.4 nano: 41.9 (#103), Molmo 2 8b: —
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| GPQA Diamond | 78.5% | — |
| SimpleQA Verified | 11.7% | — |
| Vectara Hallucination Rate | 3.1% | — |
| LMArena Expert | 1396 | — |
Multimodal GPT-5.4 nano leads
GPT-5.4 nano: 36.7 (#78), Molmo 2 8b: 30.2 (#112)
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| LMArena Vision | 1196 | 1081 |
Multilingual GPT-5.4 nano leads
GPT-5.4 nano: 48.6 (#140), Molmo 2 8b: 42.7 (#190)
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1359 | 1276 |
| LMArena Chinese | 1392 | — |
| LMArena French | 1396 | — |
| LMArena German | 1367 | — |
| LMArena Japanese | 1343 | — |
| LMArena Korean | 1320 | — |
| LMArena Russian | 1363 | — |
| LMArena Spanish | 1371 | — |
Instruction Following GPT-5.4 nano leads
GPT-5.4 nano: 71.9 (#144), Molmo 2 8b: 67.0 (#201)
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1362 | 1270 |
Long Context Not comparable
GPT-5.4 nano: 41.6 (#137), Molmo 2 8b: —
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| LMArena Longer Query | 1366 | — |
Writing & Preference GPT-5.4 nano leads
GPT-5.4 nano: 55.7 (#142), Molmo 2 8b: 49.4 (#191)
| Benchmark | GPT-5.4 nano | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1372 | 1288 |
| LMArena Creative Writing | 1314 | — |
| LMArena Multi-Turn | 1382 | — |
Frequently asked questions
Is GPT-5.4 nano better than Molmo 2 8b?
GPT-5.4 nano is the stronger model overall, scoring 41.9 to 39.1 on the Noometry Index.
How many benchmarks do GPT-5.4 nano and Molmo 2 8b share?
5 benchmarks have published results for both models. GPT-5.4 nano has 40 scored results on Noometry and Molmo 2 8b has 5.