Fusion Mini: pricing, context window and benchmarks
Fusion Mini is a mid-range model from OpenRouter. It offers a 4,096-token context window, costs $4.89 per million input tokens and $22.97 per million output tokens, and averages 63.3 across the index's benchmark suite.
Pricing
Fusion Mini costs $4.89 per million input tokens and $22.97 per million output tokens. A blended 3:1 input-to-output mix works out to about $9.41 per million tokens. Cached input is listed at $0.44 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $4.89 | per 1M tokens |
| Output | $22.97 | per 1M tokens |
| Cached input | $0.44 | per 1M tokens |
| Blended 3:1 | $9.41 | estimate per 1M tokens |
| 1M in + 1M out | $27.86 | 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 | 66.5 | 430 | 28th | |
| GPQA Diamond | 59.3 | 409 | 32th | |
| SWE-bench Verified | 47.5 | 441 | 27th | |
| HumanEval | 67.2 | 419 | 30th | |
| MATH-500 | 63.4 | 432 | 28th | |
| AIME 2025 | 56.6 | 406 | 32th | |
| LiveCodeBench | 51.8 | 431 | 28th | |
| IFEval | 73.4 | 412 | 31th | |
| TruthfulQA | 70.1 | 398 | 34th | |
| HellaSwag | 77.5 | 407 | 32th | |
| MMMU | 63.5 | 396 | 34th | |
| Arena Elo | 1312.2 | 403 | 33th |
What Fusion Mini is good for
Fusion Mini is a general-purpose model in the index. It handles text generation, summarization and question answering, and it can be a sensible default when you need a balance of quality, price and context. At $4.89 per million input tokens with a 4,096-token window, check its benchmark profile against the specific task before committing.
Strengths
- Accepts more than text, including image input where the provider supports it.
Trade-offs
- Proprietary licence: you cannot download the weights or self-host the model.
- Context window of 4,096 tokens is small for long-document work.
- Average benchmark score is below the index median; test it on your own task.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Llama 4 Maverick 8B | Meta AI | 4096 | $1.64 | 63.4 |
| Fusion Mini | OpenRouter | 4096 | $4.89 | 63.3 |
| DeepSeek-V3.2 7B | DeepSeek | 4096 | $1.75 | 63.2 |
| Firefunction Mini | Fireworks AI | 32768 | $4.63 | 63.2 |
| GLM-4.6 8B | Zhipu AI | 8192 | $1.69 | 63.1 |
| SmolLM3 | Hugging Face | 8192 | $1.71 | 63.1 |
FAQ
How much does Fusion Mini cost?
Fusion Mini is listed at $4.89 per million input tokens and $22.97 per million output tokens. Cached input is $0.44 per million tokens. A blended 3:1 input-to-output mix is about $9.41 per million tokens.
What is the context window of Fusion Mini?
Fusion Mini has a context window of 4,096 tokens and can emit up to 4,096 output tokens per request in this index.
Is Fusion Mini open weights?
No. Fusion Mini is a proprietary model with a proprietary licence, so you cannot download the weights.
How does Fusion Mini score on benchmarks?
Fusion Mini averages 63.3 across the scored benchmarks in this index, ranking #415 of 600 models. Its strongest relative result is Arena Elo at 1312.2.
What is Fusion Mini best for?
Fusion Mini is a general-purpose model in the index. It handles text generation, summarization and question answering, and it can be a sensible default when you need a balance of quality, price and context. At $4.89 per million input tokens with a 4,096-token window, check its benchmark profile against the specific task before committing.