head-to-head

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

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-04.

	Thinking Machines: Inkling Small (batch)	OpenAI: GPT-5.6 Luna Pro
Vendor	thinkingmachines	openai
Quality Score	100	100
Benchmark Score	68.7	-
Input Price	$0.50/M	$0.20/M
Output Price	$1.20/M	$1.20/M
Context Window	524,288	1,050,000
Max Output	471,859	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 (batch)	OpenAI: GPT-5.6 Luna Pro
SQL Generation	156	133
Code Review	155	132
Code Completion	133	131
Code Refactoring	154	136
Bug Fixing	170	136
Unit Test Generation	140	124
Code Documentation	141	131
Regex Writing	133	119
CI/CD Pipelines	135	120
Frontend Component Design	137	122
Data Analysis	156	124
CSV / Spreadsheet Cleanup	139	133
ETL Scripting	145	128
JSON Extraction	134	131
Bulk Data Labeling	130	129
OCR / Document Parsing	136	131
Table Extraction from PDFs	136	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 →