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Model information
| Item | Value |
|---|---|
| Model ID | nex-agi/Nex-N2.5-mini; OpenRouter free tier: nex-agi/nex-n2.5-mini:free |
| Parameters | 35B total, roughly 3B active; a Qwen3.5-35B-A3B-Base post-training derivative |
| Context window | 262,144 tokens; 235.9K maximum output |
| Price | $0.00 input and output on OpenRouter's free tier; Nex has not published standalone commercial API pricing |
| License | Apache-2.0 |
| Released | 2026-09-08 |
Highlights
- Nex reports DeepSWE v1.1 improving from 8.0 for N2-mini to 36.1, and Terminal-Bench 2.1 improving from 60.7 to 73.4.
- The model is designed for visual-feedback self-correction: it can operate a computer or browser, inspect the result, diagnose a mismatch, and retry.
- Nex reports 82.9 on OSWorld-G, ahead of its reported Claude Opus 5 and GPT-5.6 Sol comparisons.
Benchmark context
| Benchmark | Nex-N2.5-mini | Prior N2-mini | Reported leading competitor |
|---|---|---|---|
| Terminal-Bench 2.1 | 73.4 | 60.7 | Claude Opus 5: 89.1 |
| DeepSWE v1.1 | 36.1 | 8.0 | Claude Opus 5: 73.7 |
| BrowseComp | 83.4 | 74.1 | Claude Opus 5: 90.8 |
| AutomationBench v1.0.6 | 32.3 | N/A | Claude Opus 5: 50.3 |
| SWE-Bench Pro | 43.8 | N/A | Claude Opus 5: 79.2 |
The release uses Nex AGI's own NexAU/NexCUA harness. Earlier N2-mini figures come from a mix of the project's GitHub material and third-party evaluators, so treat the table as directional rather than a controlled head-to-head comparison.
What it means for agent builders
Nex-N2.5-mini is aimed at computer-use and browser-use loops rather than general chat. Its visual-feedback design and free tier make it a practical model for testing whether an agent can observe a result, correct an action, and retry before committing to a paid provider.
It is less suitable for high-accuracy production coding work: the reported SWE-Bench Pro result is 43.8, well below Nex's Max model and Claude Opus 5. The lack of independently published commercial API terms is also a constraint for workloads that require a production SLA.
Comparison with the prior model
Nex's published gains are largest on longer software-engineering tasks, but the comparisons mix release-harness measurements with historical figures. Use them to form an evaluation shortlist, then run the same browser or computer-use tasks your agent must complete.
Takeaway
The free tier and computer-use orientation make Nex-N2.5-mini useful for prototypes. Its published scores and commercial support details do not yet justify treating it as a drop-in production coding default.