Molmo 8B on Arena Elo: score, rank and what it means
Molmo 8B scores 1186.2 on Arena Elo, placing it #568 of 600 models in the index. The benchmark average is 1349.9 and the leader is Claude Opus 4.5 Max at 1501.9.
Score distribution
The chart shows the top 10 models on Arena Elo, with Molmo 8B highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 2 | GPT-5.2 Reasoning | OpenAI | 1000000 | $20.98 | 87.5 |
| 3 | GPT-5.2 Turbo | OpenAI | 1000000 | $20.73 | 87.4 |
| 4 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
| 5 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 6 | Gemini 3 Pro Turbo | Google DeepMind | 400000 | $19.62 | 86.4 |
| 7 | Grok 4 Max | xAI | 2000000 | $19.70 | 86.6 |
| 8 | Claude Opus 4.5 | Anthropic | 400000 | $19.42 | 87.7 |
| 9 | GPT-5.1 Pro | OpenAI | 200000 | $19.77 | 87.8 |
| 10 | Grok 4 Reasoning | xAI | 2000000 | $19.67 | 87.8 |
What this score means
On Arena Elo, Molmo 8B sits at #568 of 600. The leader, Claude Opus 4.5 Max, scores 1501.9, so the gap to the top is 315.7 points. The median model in this index scores 1373.8, which puts Molmo 8B below the midpoint.
Allen Institute for AI models average 1273.7 on this benchmark. Molmo 8B is 87.5 points below that provider line, so it is a weaker result than the average Allen Institute for AI model.
Among small open-weight models, the average is 1224.7. Molmo 8B is 38.5 points below that group. This is the more useful comparison if you are shortlisting within the same tier rather than across the whole index.
Read a 1186.2 as a relative signal, not an absolute guarantee. Benchmark scores depend on prompt format, evaluation harness and contamination controls. Use this page to narrow the shortlist, then test the model on your own data.
Price context
At $0.44 per million input tokens, Molmo 8B is below the median input price of $4.00 across the 600 models scored on Arena Elo. The models immediately around it in the ranking are shown below so you can compare score and price together.
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Codestral 1.5B | Mistral AI | 8192 | $0.52 | 49.9 |
| Phi-3.5 7B | Microsoft | 4096 | $0.50 | 50.5 |
| Mixtral 1.5B | Mistral AI | 16384 | $0.36 | 47.7 |
| Llama 3.1 1.5B | Meta AI | 4096 | $0.53 | 50.7 |
| Molmo 8B | Allen Institute for AI | 32768 | $0.44 | 49.9 |
| Llama 3 Modal 1.5B | Modal | 4096 | $0.42 | 49.7 |
| Llama 3.1 Turbo 1.5B | Together AI | 16384 | $0.46 | 49.8 |
Other benchmarks for Molmo 8B
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 55.7 | 569 | 5th | |
| GPQA Diamond | 47.9 | 540 | 10th | |
| SWE-bench Verified | 33.6 | 567 | 6th | |
| HumanEval | 54.0 | 549 | 9th | |
| MATH-500 | 49.2 | 560 | 7th | |
| AIME 2025 | 35.5 | 564 | 6th | |
| LiveCodeBench | 35.6 | 568 | 5th | |
| IFEval | 60.2 | 572 | 5th | |
| TruthfulQA | 58.2 | 545 | 9th | |
| HellaSwag | 69.1 | 545 | 9th | |
| MMMU | 50.4 | 549 | 9th |
FAQ
What score does Molmo 8B get on Arena Elo?
Molmo 8B scores 1186.2 on Arena Elo in this index. The benchmark average is 1349.9 and the top score is 1501.9.
How does Molmo 8B rank on Arena Elo?
It ranks #568 of 600 models, in the 5th percentile. The leader is Claude Opus 4.5 Max at 1501.9.
Is Molmo 8B good at Arena Elo?
It is below the median for this benchmark, so test it carefully before relying on it for this capability. The result should be read alongside its price and context window.
How is the Arena Elo score calculated?
Arena Elo is a preference benchmark. Scores in this index are modelled estimates on a 0–100 scale (or Elo for Arena), derived from capability tier and benchmark difficulty. They are not official leaderboard results.
What does Molmo 8B cost?
Molmo 8B costs $0.44 per million input tokens and $2.29 per million output tokens.