head-to-head

Anthropic: Claude Haiku 5.5 vs OpenAI: GPT Luna Latest

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-08.

The verdict

For a sample job of 1 million input tokens and 250,000 output tokens, both cost $0.23 at current list prices.

Both take in a similar amount of text: 1,000,000 and 1,050,000 tokens, about 1,500 and 1,575 pages.

Across the 18 tasks where they differ, Claude Haiku 5.5 scores higher on 18 (SQL Generation, Code Review, Code Completion and others).

Claude Haiku 5.5 was released in October 2026 and GPT Luna Latest in September 2026.

Pick Claude Haiku 5.5 if you need the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.

Task	Anthropic: Claude Haiku 5.5	OpenAI: GPT Luna Latest
SQL Generation	142	133
Code Review	145	132
Code Completion	133	131
Code Refactoring	147	136
Bug Fixing	149	136
Unit Test Generation	132	124
Code Documentation	138	131
Regex Writing	127	119
CI/CD Pipelines	128	120
Frontend Component Design	130	122
Data Analysis	134	124
CSV / Spreadsheet Cleanup	136	133
ETL Scripting	138	128
OCR / Document Parsing	134	131
Table Extraction from PDFs	134	131
Long-Document Summarization	149	137
Short-Form Summarization	127	123
Blog Post Writing	130	121

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