Anthropic: Claude Haiku 5.5 (batch) vs OpenAI: GPT-6 Luna
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-08.
| Anthropic: Claude Haiku 5.5 (batch) | OpenAI: GPT-6 Luna | |
|---|---|---|
| Vendor | anthropic | openai |
| Quality Score | 100 | 100 |
| Benchmark Score | 73.6 | 63.8 |
| Input Price | $0.05/M | $0.10/M |
| Output Price | $0.25/M | $0.50/M |
| Context Window | 1,000,000 | 1,050,000 |
| Max Output | 128,000 | 128,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 71.6 | 62.9 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Claude Haiku 5.5 (batch) costs $0.11 and GPT-6 Luna costs $0.23, so Claude Haiku 5.5 (batch) is about 2.0 times cheaper for the same work.
Both take in a similar amount of text: 1,000,000 and 1,050,000 tokens, about 1,500 and 1,575 pages.
On our blended benchmark score Claude Haiku 5.5 (batch) leads 73.6 to 63.8.
Across the 19 tasks where they differ, Claude Haiku 5.5 (batch) scores higher on 19 (SQL Generation, Code Review, Code Completion and others).
Claude Haiku 5.5 (batch) was released in October 2026 and GPT-6 Luna in September 2026.
Pick Claude Haiku 5.5 (batch) if you need lower cost, benchmark performance or 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.
Who wins by task?
| Task | Anthropic: Claude Haiku 5.5 (batch) | OpenAI: GPT-6 Luna |
|---|---|---|
| SQL Generation | 142 | 141 |
| Code Review | 145 | 144 |
| Code Completion | 133 | 133 |
| Code Refactoring | 147 | 146 |
| Bug Fixing | 149 | 148 |
| Unit Test Generation | 132 | 131 |
| Code Documentation | 138 | 137 |
| Regex Writing | 127 | 126 |
| CI/CD Pipelines | 128 | 127 |
| Frontend Component Design | 130 | 129 |
| Data Analysis | 134 | 133 |
| CSV / Spreadsheet Cleanup | 136 | 136 |
| ETL Scripting | 138 | 136 |
| Bulk Data Labeling | 129 | 129 |
| OCR / Document Parsing | 134 | 134 |
| Table Extraction from PDFs | 134 | 134 |
| Long-Document Summarization | 149 | 148 |
| Short-Form Summarization | 127 | 127 |
| Blog Post Writing | 130 | 129 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →