Fusion Pro: pricing, context window and benchmarks
Fusion Pro is a mid-range model from OpenRouter. It offers a 65,536-token context window, costs $8.69 per million input tokens and $46.67 per million output tokens, and averages 72.2 across the index's benchmark suite.
Pricing
Fusion Pro costs $8.69 per million input tokens and $46.67 per million output tokens. A blended 3:1 input-to-output mix works out to about $18.19 per million tokens. Cached input is listed at $0.98 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $8.69 | per 1M tokens |
| Output | $46.67 | per 1M tokens |
| Cached input | $0.98 | per 1M tokens |
| Blended 3:1 | $18.19 | estimate per 1M tokens |
| 1M in + 1M out | $55.36 | 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 | 75.7 | 312 | 48th | |
| GPQA Diamond | 67.6 | 319 | 47th | |
| SWE-bench Verified | 57.1 | 366 | 39th | |
| HumanEval | 78.5 | 279 | 54th | |
| MATH-500 | 74.1 | 345 | 43th | |
| AIME 2025 | 67.3 | 308 | 49th | |
| LiveCodeBench | 63.9 | 322 | 46th | |
| IFEval | 82.1 | 271 | 55th | |
| TruthfulQA | 73.2 | 366 | 39th | |
| HellaSwag | 83.5 | 303 | 50th | |
| MMMU | 71.4 | 262 | 56th | |
| Arena Elo | 1375.8 | 289 | 52th |
What Fusion Pro is good for
Fusion Pro 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 $8.69 per million input tokens with a 65,536-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.
- Premium input pricing at $8.69 per million tokens.
- Average benchmark score is below the index median; test it on your own task.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Firefunction | Fireworks AI | 16384 | $8.16 | 72.3 |
| Fusion Pro | OpenRouter | 65536 | $8.69 | 72.2 |
| Fusion Reasoning | OpenRouter | 65536 | $8.59 | 72.2 |
| Llama 3 Modal Base | Modal | 16384 | $3.21 | 72.2 |
| Llama 3.1 Base | Meta AI | 32768 | $3.39 | 72.2 |
| Seed-OSS Base | ByteDance | 16384 | $3.14 | 72.2 |
FAQ
How much does Fusion Pro cost?
Fusion Pro is listed at $8.69 per million input tokens and $46.67 per million output tokens. Cached input is $0.98 per million tokens. A blended 3:1 input-to-output mix is about $18.19 per million tokens.
What is the context window of Fusion Pro?
Fusion Pro has a context window of 65,536 tokens and can emit up to 8,192 output tokens per request in this index.
Is Fusion Pro open weights?
No. Fusion Pro is a proprietary model with a proprietary licence, so you cannot download the weights.
How does Fusion Pro score on benchmarks?
Fusion Pro averages 72.2 across the scored benchmarks in this index, ranking #321 of 600 models. Its strongest relative result is Arena Elo at 1375.8.
What is Fusion Pro best for?
Fusion Pro 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 $8.69 per million input tokens with a 65,536-token window, check its benchmark profile against the specific task before committing.