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 2026-09-23.

	Thinking Machines: Inkling Small	OpenAI: GPT-5.6 Luna Pro
Vendor	thinkingmachines	openai
Quality Score	100	100
Benchmark Score	44.5	-
Input Price	$0.45/M	$0.20/M
Output Price	$1.20/M	$1.20/M
Context Window	1,048,576	1,050,000
Max Output	262,144	128,000
Tool Calling	✓	✓
Structured Output	-	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	✓	-
Benchmark Scores
ai_index	45.8	-

Who wins by task?

Task	Thinking Machines: Inkling Small	OpenAI: GPT-5.6 Luna Pro
SQL Generation	131	133
Code Review	136	132
Code Completion	132	131
Code Refactoring	139	136
Bug Fixing	144	136
Unit Test Generation	121	124
Code Documentation	135	131
Regex Writing	124	119
CI/CD Pipelines	121	120
Frontend Component Design	123	122
Data Analysis	126	124
CSV / Spreadsheet Cleanup	123	133
ETL Scripting	130	128
JSON Extraction	119	131
Bulk Data Labeling	125	129
OCR / Document Parsing	125	131
Table Extraction from PDFs	125	131
Long-Document Summarization	145	137
Short-Form Summarization	126	123
Blog Post Writing	127	121

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