head-to-head

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

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-02.

	Thinking Machines: Inkling Small	OpenAI: GPT-5.6 Luna
Vendor	thinkingmachines	openai
Quality Score	100	100
Benchmark Score	69.0	88.4
Input Price	$0.50/M	$0.10/M
Output Price	$1.20/M	$0.60/M
Context Window	524,288	1,050,000
Max Output	-	128,000
Tool Calling	✓	✓
Structured Output	-	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	✓	-
Benchmark Scores
ai_index	66.3	84.5
ai_index_agentic	50.8	75.2
ai_index_coding	87.4	100.0

Who wins by task?

Task	Thinking Machines: Inkling Small	OpenAI: GPT-5.6 Luna
SQL Generation	155	171
Code Review	155	166
Code Completion	133	133
Code Refactoring	154	163
Bug Fixing	169	179
Unit Test Generation	140	154
Code Documentation	140	143
Regex Writing	132	136
CI/CD Pipelines	135	144
Frontend Component Design	137	146
Data Analysis	156	170
CSV / Spreadsheet Cleanup	139	154
ETL Scripting	144	154
JSON Extraction	134	149
Bulk Data Labeling	130	135
OCR / Document Parsing	136	146
Table Extraction from PDFs	136	146
Long-Document Summarization	155	160
Short-Form Summarization	130	132
Blog Post Writing	136	140

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