GPT-6 Astra vs Mistral Small 4: cost per task
Mistral Small 4 is cheaper on 14 of 14 tasks and about 20.7x cheaper on average (geometric mean).
| Task | GPT-6 Astra | Mistral Small 4 | Difference |
|---|---|---|---|
| Answer a chat question | 3.4¢ | 0.08¢ | 40.4x |
| Reply to a customer email | 0.89¢ | 0.22¢ | 4.1x |
| Write a 1,500-word blog post | 11¢ | 0.47¢ | 24.6x |
| Write 10 product descriptions | 6.2¢ | 0.19¢ | 32.6x |
| Translate 1,000 words | 8.0¢ | 0.75¢ | 10.7x |
| Proofread one page (500 words) | 4.0¢ | 0.26¢ | 15.5x |
| Summarize a 20-page PDF | 16¢ | 0.33¢ | 46.9x |
| Extract data from an invoice | 2.6¢ | 0.16¢ | 15.9x |
| Analyze a 200-row spreadsheet | 42¢ | 0.71¢ | 59.1x |
| Answer from 5 retrieved documents (RAG) | 5.9¢ | 0.25¢ | 23.8x |
| Classify 100 support tickets | 3.9¢ | 0.46¢ | 8.3x |
| Review 500 lines of code | 24¢ | 0.62¢ | 39.6x |
| Write a SQL query | 2.4¢ | 0.19¢ | 12.7x |
| Run a 50-step coding agent | $3.72 | 13¢ | 27.6x |
Specs and list prices
| GPT-6 Astra | Mistral Small 4 | |
|---|---|---|
| Input per 1M | $10.00 | $0.15 |
| Output per 1M | $50.00 | $0.60 |
| Cached input per 1M | $1.00 | $0.015 |
| Context | 1.05M | 262K |
| Providers | 7 | 4 |
| Reasoning | always | default |
| LMArena Text | 1477 | - |
| Released | Sep 4, 2026 | Mar 16, 2026 |
FAQ
Is GPT-6 Astra or Mistral Small 4 cheaper?
Mistral Small 4 is cheaper on 14 of 14 tasks and about 20.7x cheaper on average (geometric mean).
How much does GPT-6 Astra cost compared to Mistral Small 4 per token?
GPT-6 Astra: $10.00 input and $50.00 output per 1M tokens. Mistral Small 4: $0.15 input and $0.60 output. Token prices alone mislead - models use different numbers of tokens for the same task, which is what the task table shows.