OpenAI: GPT Luna Latest vs ByteDance Seed: Seed 2.1 Turbo
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| OpenAI: GPT Luna Latest | ByteDance Seed: Seed 2.1 Turbo | |
|---|---|---|
| Vendor | ~openai | bytedance-seed |
| Quality Score | 100 | 100 |
| Input Price | $0.10/M | $0.50/M |
| Output Price | $0.50/M | $2.50/M |
| Context Window | 1,050,000 | 262,144 |
| Max Output | 128,000 | 235,929 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, GPT Luna Latest costs $0.23 and Seed 2.1 Turbo costs $1.12, so GPT Luna Latest is about 5.0 times cheaper for the same work.
GPT Luna Latest reads up to 1,050,000 tokens at once, roughly 1,575 pages of text, against about 393 pages for Seed 2.1 Turbo.
Only Seed 2.1 Turbo offers video input.
Across the 18 tasks where they differ, GPT Luna Latest scores higher on 18 (SQL Generation, Code Review, Code Completion and others).
GPT Luna Latest was released in September 2026 and Seed 2.1 Turbo in August 2026.
Pick GPT Luna Latest if you need lower cost, long documents or the stronger all-round task scores; pick Seed 2.1 Turbo if you need video input.
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 | OpenAI: GPT Luna Latest | ByteDance Seed: Seed 2.1 Turbo |
|---|---|---|
| SQL Generation | 133 | 130 |
| Code Review | 132 | 126 |
| Code Completion | 131 | 128 |
| Code Refactoring | 136 | 127 |
| Bug Fixing | 136 | 130 |
| Unit Test Generation | 124 | 121 |
| Code Documentation | 131 | 125 |
| Regex Writing | 119 | 119 |
| CI/CD Pipelines | 120 | 117 |
| CSV / Spreadsheet Cleanup | 133 | 128 |
| ETL Scripting | 128 | 122 |
| JSON Extraction | 131 | 131 |
| Bulk Data Labeling | 129 | 129 |
| OCR / Document Parsing | 131 | 128 |
| Table Extraction from PDFs | 131 | 128 |
| Long-Document Summarization | 137 | 129 |
| Short-Form Summarization | 123 | 123 |
| Blog Post Writing | 121 | 118 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →