head-to-head

Thinking Machines: Inkling Small vs SpaceXAI: Grok 4.5

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.

	Thinking Machines: Inkling Small	SpaceXAI: Grok 4.5
Vendor	thinkingmachines	x-ai
Quality Score	100	100
Benchmark Score	44.5	65.0
Input Price	$0.45/M	$2.00/M
Output Price	$1.20/M	$6.00/M
Context Window	1,048,576	500,000
Max Output	262,144	450,000
Tool Calling	✓	✓
Structured Output	-	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	✓	-
Benchmark Scores
ai_index	45.8	64.0

Who wins by task?

Task	Thinking Machines: Inkling Small	SpaceXAI: Grok 4.5
SQL Generation	131	140
Code Review	136	144
Code Completion	132	119
Code Refactoring	139	146
Bug Fixing	144	148
Unit Test Generation	121	131
Code Documentation	135	136
Regex Writing	124	124
CI/CD Pipelines	121	127
Frontend Component Design	123	129
Data Analysis	126	133
CSV / Spreadsheet Cleanup	123	135
ETL Scripting	130	137
JSON Extraction	119	122
Bulk Data Labeling	125	119
OCR / Document Parsing	125	134
Table Extraction from PDFs	125	134
Long-Document Summarization	145	147
Short-Form Summarization	126	117
Blog Post Writing	127	128

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