head-to-head

Thinking Machines: Inkling (batch) vs StepFun: Step 3.7 Flash

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-08-07.

	Thinking Machines: Inkling (batch)	StepFun: Step 3.7 Flash
Vendor	thinkingmachines	stepfun
Quality Score	100	100
Benchmark Score	70.5	50.1
Input Price	$0.50/M	$0.20/M
Output Price	$2.02/M	$1.15/M
Context Window	524,288	262,144
Max Output	-	256,000
Tool Calling	✓	✓
Structured Output	-	✓
Reasoning Mode	✓	✓
Vision	✓	✓
Audio	✓	-
Benchmark Scores
ai_index	69.8	51.0
ai_index_agentic	56.3	35.9
ai_index_coding	85.9	65.3

Who wins by task?

Task	Thinking Machines: Inkling (batch)	StepFun: Step 3.7 Flash
SQL Generation	156	153
Code Review	156	146
Code Completion	132	130
Code Refactoring	154	144
Bug Fixing	171	155
Unit Test Generation	140	139
Code Documentation	141	133
Regex Writing	133	129
CI/CD Pipelines	136	131
Frontend Component Design	138	136
Data Analysis	157	150
CSV / Spreadsheet Cleanup	139	141
ETL Scripting	145	138
JSON Extraction	134	142
Bulk Data Labeling	130	133
OCR / Document Parsing	136	138
Table Extraction from PDFs	136	138
Long-Document Summarization	155	142
Short-Form Summarization	130	128
Blog Post Writing	136	130

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