head-to-head

Thinking Machines: Inkling Small vs OpenAI: GPT-5.6 Luna Pro

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-13.

	Thinking Machines: Inkling Small	OpenAI: GPT-5.6 Luna Pro
Vendor	thinkingmachines	openai
Quality Score	100	100
Benchmark Score	69.1	-
Input Price	$0.45/M	$0.10/M
Output Price	$1.20/M	$0.60/M
Context Window	524,288	1,050,000
Max Output	262,144	128,000
Tool Calling	✓	✓
Structured Output	✓	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	✓	-
Benchmark Scores
ai_index	67.9	-
ai_index_agentic	52.6	-
ai_index_coding	87.4	-

Who wins by task?

Task	Thinking Machines: Inkling Small	OpenAI: GPT-5.6 Luna Pro
SQL Generation	164	133
Code Review	159	132
Code Completion	133	131
Code Refactoring	158	136
Bug Fixing	170	136
Unit Test Generation	148	124
Code Documentation	141	131
Regex Writing	133	119
CI/CD Pipelines	139	120
Frontend Component Design	141	122
Data Analysis	160	124
CSV / Spreadsheet Cleanup	151	133
ETL Scripting	149	128
JSON Extraction	146	131
Bulk Data Labeling	134	129
OCR / Document Parsing	144	131
Table Extraction from PDFs	144	131
Long-Document Summarization	155	137
Short-Form Summarization	130	123
Blog Post Writing	136	121

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