OpenAI: GPT-6.1 Sol (batch) vs Nex AGI: Nex-N2.5-Pro
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-30.
| OpenAI: GPT-6.1 Sol (batch) | Nex AGI: Nex-N2.5-Pro | |
|---|---|---|
| Vendor | openai | nex-agi |
| Quality Score | 100 | 100 |
| Benchmark Score | 89.2 | - |
| Input Price | $1.00/M | $0.07/M |
| Output Price | $5.00/M | $0.25/M |
| Context Window | 1,050,000 | 262,144 |
| Max Output | 128,000 | 235,929 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 85.5 | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Nex-N2.5-Pro costs $0.14 and GPT-6.1 Sol (batch) costs $2.25, so Nex-N2.5-Pro is about 16.4 times cheaper for the same work.
GPT-6.1 Sol (batch) reads up to 1,050,000 tokens at once, roughly 1,575 pages of text, against about 393 pages for Nex-N2.5-Pro.
Across the 20 tasks where they differ, GPT-6.1 Sol (batch) scores higher on 16 (SQL Generation, Code Review, Code Refactoring and others), Nex-N2.5-Pro on 4 (Code Completion, JSON Extraction, Bulk Data Labeling and others).
Pick GPT-6.1 Sol (batch) if you need long documents or the stronger all-round task scores; pick Nex-N2.5-Pro if you need lower cost.
Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.
Who wins by task?
| Task | OpenAI: GPT-6.1 Sol (batch) | Nex AGI: Nex-N2.5-Pro |
|---|---|---|
| SQL Generation | 143 | 131 |
| Code Review | 148 | 126 |
| Code Completion | 120 | 129 |
| Code Refactoring | 149 | 127 |
| Bug Fixing | 152 | 130 |
| Unit Test Generation | 134 | 121 |
| Code Documentation | 138 | 126 |
| Regex Writing | 127 | 119 |
| CI/CD Pipelines | 130 | 117 |
| Frontend Component Design | 132 | 122 |
| Data Analysis | 136 | 124 |
| CSV / Spreadsheet Cleanup | 136 | 128 |
| ETL Scripting | 140 | 122 |
| JSON Extraction | 122 | 131 |
| Bulk Data Labeling | 120 | 129 |
| OCR / Document Parsing | 135 | 128 |
| Table Extraction from PDFs | 135 | 128 |
| Long-Document Summarization | 151 | 129 |
| Short-Form Summarization | 119 | 123 |
| Blog Post Writing | 131 | 119 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →