head-to-head

MoonshotAI: Kimi K3.1 Pro vs OpenAI: GPT-6.1 Sol Pro

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-24.

The verdict

For a sample job of 1 million input tokens and 250,000 output tokens, both cost $4.50 at current list prices.

Both take in a similar amount of text: 1,048,576 and 1,050,000 tokens, about 1,573 and 1,575 pages.

Only Kimi K3.1 Pro offers video input.

Across the 18 tasks where they differ, Kimi K3.1 Pro scores higher on 18 (SQL Generation, Code Review, Code Completion and others).

Kimi K3.1 Pro was released in October 2026 and GPT-6.1 Sol Pro in September 2026.

Pick Kimi K3.1 Pro if you need video input or the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.

Task	MoonshotAI: Kimi K3.1 Pro	OpenAI: GPT-6.1 Sol Pro
SQL Generation	143	132
Code Review	149	132
Code Completion	119	117
Code Refactoring	150	136
Bug Fixing	153	136
Unit Test Generation	134	124
Code Documentation	137	129
Regex Writing	126	117
CI/CD Pipelines	130	120
Frontend Component Design	132	122
Data Analysis	137	124
CSV / Spreadsheet Cleanup	136	132
ETL Scripting	140	128
OCR / Document Parsing	135	131
Table Extraction from PDFs	135	131
Long-Document Summarization	151	136
Short-Form Summarization	118	113
Blog Post Writing	131	120

Scores reflect capability match + benchmark data + pricing for each task. Methodology →