Nex-N2-Pro vs Mercury 2 compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
| Spec | Nex-N2-Pro | Mercury 2 | Winner |
|---|---|---|---|
| Maker | Nex agi | Inception | – |
| Type | Open-weight | Proprietary | NENex-N2-Pro |
| Context window | 262K tokens | 128K tokens | NENex-N2-Pro |
| Input price | $0.25/M · free self-host | $0.25/M | = Tie |
| Output price | $1/M · free self-host | $0.75/M | INMercury 2 |
| Vision / multimodal | Yes | No | NENex-N2-Pro |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | Yes | No (API only) | NENex-N2-Pro |
| License | Open weights | Proprietary | NENex-N2-Pro |
| Capability | Nex-N2-Pro | Mercury 2 |
|---|---|---|
| Open weights (downloadable) | ✓ | ✗ |
| Self-hostable | ✓ | ✗ |
| Runs fully offline | ✓ | ✗ |
| Vision / multimodal | ✓ | ✗ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✗ | ✗ |
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
| Criterion | Nex-N2-Pro | Mercury 2 |
|---|---|---|
| Cost-efficiency | 4.5 | 5.0 |
| Context window | 4.0 | 3.5 |
| Openness | 5.0 | 1.5 |
| Self-hosting | 5.0 | 1.0 |
| Multimodality | 5.0 | 3.5 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
Nex-N2-Pro is an agentic mixture-of-experts model from Nex AGI, with 17B active parameters out of 397B total. Built on the Qwen3.5 architecture, it accepts text and image input and produces...
Mercury 2 is an extremely fast reasoning LLM, and the first reasoning diffusion LLM (dLLM). Instead of generating tokens sequentially, Mercury 2 produces and refines multiple tokens in parallel, achieving...
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Nex-N2-Pro is open-weight and competitive on many tasks, but Mercury 2 may still lead on the hardest reasoning and agentic work. The gap keeps narrowing — benchmark both on your actual use case before deciding.
Yes. Nex-N2-Pro has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. Mercury 2 is API-only and cannot be self-hosted.
Choose Nex-N2-Pro if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose Mercury 2 if you want frontier capability through a managed API with zero infrastructure to run.
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