GPT-6 Luna vs Voxtral Small
Price and specs side by side · USD per 1M tokens · verified 2026-10-23
// side by side
| metric | GPT-6 Luna | Voxtral Small |
|---|
| input / 1M | $0.10 | $0.10 |
| output / 1M | $0.50 | $0.40 |
| blended (3:1) | $0.20 | $0.175 |
| cache read / 1M | $0.01 | — |
| context | 1.05M | 32.8K |
| max output | 128K | 32K |
| input types | text · image · pdf | text · audio · pdf |
| reasoning | yes | no |
| tool calling | yes | yes |
| structured output | yes | yes |
| open weights | no | yes |
| released | 2026-09-22 | 2025-07-15 |
| knowledge cutoff | 2026-05-18 | n/a |
| lab | OpenAI | Mistral |
// monthly cost scenarios
| workload | tokens in / out | GPT-6 Luna | Voxtral Small |
|---|
| Chatbot | 10M / 2M | $2.00 | $1.80 |
| RAG app | 50M / 5M | $7.50 | $7.00 |
| Coding agent | 20M / 10M | $7.00 | $6.00 |
// verdict
- Voxtral Small is 12.5% cheaper than GPT-6 Luna on a blended 3:1 input/output basis.
- GPT-6 Luna has the larger context window (1.05M vs 32.8K tokens).
- Only GPT-6 Luna supports built-in reasoning.
- Only GPT-6 Luna accepts image input.
- Chatbot (10M input / 2M output tokens per month): Voxtral Small costs $1.80 vs $2.00 for GPT-6 Luna, saving $0.20 per month.
- RAG app (50M input / 5M output tokens per month): Voxtral Small costs $7.00 vs $7.50 for GPT-6 Luna, saving $0.50 per month.
- Coding agent (20M input / 10M output tokens per month): Voxtral Small costs $6.00 vs $7.00 for GPT-6 Luna, saving $1.00 per month.
// GPT-6 Luna or Voxtral Small: which one to choose
- Choose Voxtral Small for cost-sensitive, high-volume workloads.
- Choose GPT-6 Luna for long documents and large codebases (1.05M-token context).
- Choose GPT-6 Luna if you need built-in reasoning.
- Choose GPT-6 Luna if you need image input.
- Choose Voxtral Small if you want open weights you can self-host.