Molmo 8B: pricing, context window and benchmarks
Molmo 8B is a small open-weight model from Allen Institute for AI. It offers a 32,768-token context window, costs $0.44 per million input tokens and $2.29 per million output tokens, and averages 49.9 across the index's benchmark suite.
Pricing
Molmo 8B costs $0.44 per million input tokens and $2.29 per million output tokens. A blended 3:1 input-to-output mix works out to about $0.90 per million tokens. Cached input is listed at $0.05 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $0.44 | per 1M tokens |
| Output | $2.29 | per 1M tokens |
| Cached input | $0.05 | per 1M tokens |
| Blended 3:1 | $0.90 | estimate per 1M tokens |
| 1M in + 1M out | $2.73 | estimate |
Benchmarks
Scores below are modelled estimates on a 0–100 scale. Use them to compare relative position, not as official vendor results.
| 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 | |
| Arena Elo | 1186.2 | 568 | 5th |
What Molmo 8B is good for
Molmo 8B is a small model. That makes it a good fit for classification, extraction, routing, summarization and other high-volume jobs where latency and cost dominate. It is not the right pick for open-ended frontier reasoning, but at $0.44 per million input tokens it can handle a large share of production traffic.
Strengths
- Input price of $0.44 per million tokens is at or below the index median.
- Open weights make self-hosting, fine-tuning and data-residency review possible.
Trade-offs
- Average benchmark score is below the index median; test it on your own task.
- Less reliable on open-ended reasoning and complex multi-step instructions.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Command R+ 1.5B | Cohere | 32768 | $0.51 | 50.0 |
| Llama 3.3 Groq 1.5B | Groq | 4096 | $0.46 | 50.0 |
| Yi-Lightning 1.5B | 01.AI | 4096 | $0.54 | 50.0 |
| Codestral 1.5B | Mistral AI | 8192 | $0.52 | 49.9 |
| Molmo 8B | Allen Institute for AI | 32768 | $0.44 | 49.9 |
| Seed-OSS 1.5B | ByteDance | 4096 | $0.45 | 49.8 |
FAQ
How much does Molmo 8B cost?
Molmo 8B is listed at $0.44 per million input tokens and $2.29 per million output tokens. Cached input is $0.047 per million tokens. A blended 3:1 input-to-output mix is about $0.90 per million tokens.
What is the context window of Molmo 8B?
Molmo 8B has a context window of 32,768 tokens and can emit up to 32,768 output tokens per request in this index.
Is Molmo 8B open weights?
Yes. Molmo 8B is listed as an open-weight model under a open weights licence.
How does Molmo 8B score on benchmarks?
Molmo 8B averages 49.9 across the scored benchmarks in this index, ranking #558 of 600 models. Its strongest relative result is Arena Elo at 1186.2.
What is Molmo 8B best for?
Molmo 8B is a small model. That makes it a good fit for classification, extraction, routing, summarization and other high-volume jobs where latency and cost dominate. It is not the right pick for open-ended frontier reasoning, but at $0.44 per million input tokens it can handle a large share of production traffic.