GPT-6 Luna vs Qwen3.8 Flash: cost per task
GPT-6 Luna is cheaper on 13 of 14 tasks and about 3.3x cheaper on average (geometric mean).
| Task | GPT-6 Luna | Qwen3.8 Flash | Difference |
|---|---|---|---|
| Answer a chat question | 0.06¢ | 0.08¢ | 1.3x |
| Reply to a customer email | <0.01¢ | 0.04¢ | 5.1x |
| Write a 1,500-word blog post | 0.12¢ | 0.75¢ | 6.4x |
| Write 10 product descriptions | 0.05¢ | 0.76¢ | 14.1x |
| Translate 1,000 words | 0.08¢ | 0.08¢ | 1.0x |
| Proofread one page (500 words) | 0.04¢ | 0.10¢ | 2.2x |
| Summarize a 20-page PDF | 0.16¢ | 0.32¢ | 2.1x |
| Extract data from an invoice | 0.03¢ | 0.11¢ | 3.5x |
| Analyze a 200-row spreadsheet | 0.19¢ | 0.85¢ | 4.5x |
| Answer from 5 retrieved documents (RAG) | 0.05¢ | 0.19¢ | 3.6x |
| Classify 100 support tickets | 0.06¢ | 0.42¢ | 6.5x |
| Review 500 lines of code | 0.31¢ | 0.83¢ | 2.7x |
| Write a SQL query | 0.04¢ | 0.13¢ | 3.1x |
| Run a 50-step coding agent | 4.1¢ | 9.2¢ | 2.3x |
Specs and list prices
| GPT-6 Luna | Qwen3.8 Flash | |
|---|---|---|
| Input per 1M | $0.10 | $0.15 |
| Output per 1M | $0.50 | $0.47 |
| Cached input per 1M | $0.01 | $0.016 |
| Context | 1.05M | 1M |
| Providers | 7 | 2 |
| Reasoning | default | none |
| LMArena Text | 1443 | - |
| Released | Sep 22, 2026 | Aug 26, 2026 |
FAQ
Is GPT-6 Luna or Qwen3.8 Flash cheaper?
GPT-6 Luna is cheaper on 13 of 14 tasks and about 3.3x cheaper on average (geometric mean).
How much does GPT-6 Luna cost compared to Qwen3.8 Flash per token?
GPT-6 Luna: $0.10 input and $0.50 output per 1M tokens. Qwen3.8 Flash: $0.15 input and $0.47 output. Token prices alone mislead - models use different numbers of tokens for the same task, which is what the task table shows.