Claude Haiku 5.5 vs GPT-6 Luna: cost per task
GPT-6 Luna is cheaper on 14 of 14 tasks and about 2.1x cheaper on average (geometric mean).
| Task | Claude Haiku 5.5 | GPT-6 Luna | Difference |
|---|---|---|---|
| Answer a chat question | 0.07¢ | 0.06¢ | 1.1x |
| Reply to a customer email | 0.04¢ | <0.01¢ | 4.9x |
| Write a 1,500-word blog post | 0.19¢ | 0.12¢ | 1.6x |
| Write 10 product descriptions | 0.21¢ | 0.05¢ | 3.9x |
| Translate 1,000 words | 0.13¢ | 0.08¢ | 1.5x |
| Proofread one page (500 words) | 0.07¢ | 0.04¢ | 1.6x |
| Summarize a 20-page PDF | 0.22¢ | 0.16¢ | 1.4x |
| Extract data from an invoice | 0.06¢ | 0.03¢ | 2.0x |
| Analyze a 200-row spreadsheet | 0.85¢ | 0.19¢ | 4.6x |
| Answer from 5 retrieved documents (RAG) | 0.14¢ | 0.05¢ | 2.7x |
| Classify 100 support tickets | 0.09¢ | 0.06¢ | 1.4x |
| Review 500 lines of code | 0.66¢ | 0.31¢ | 2.1x |
| Write a SQL query | 0.08¢ | 0.04¢ | 2.1x |
| Run a 50-step coding agent | 6.6¢ | 4.1¢ | 1.6x |
Specs and list prices
| Claude Haiku 5.5 | GPT-6 Luna | |
|---|---|---|
| Input per 1M | $0.10 | $0.10 |
| Output per 1M | $0.50 | $0.50 |
| Cached input per 1M | $0.01 | $0.01 |
| Context | 1M | 1.05M |
| Providers | 10 | 7 |
| Reasoning | default | default |
| LMArena Text | - | 1443 |
| Released | Oct 7, 2026 | Sep 22, 2026 |
FAQ
Is Claude Haiku 5.5 or GPT-6 Luna cheaper?
GPT-6 Luna is cheaper on 14 of 14 tasks and about 2.1x cheaper on average (geometric mean).
How much does Claude Haiku 5.5 cost compared to GPT-6 Luna per token?
Claude Haiku 5.5: $0.10 input and $0.50 output per 1M tokens. GPT-6 Luna: $0.10 input and $0.50 output. Token prices alone mislead - models use different numbers of tokens for the same task, which is what the task table shows.