DeepSeek V4.1 Flash vs GPT-6 Luna pricing
- For the Chatbot workload, GPT-6 Luna costs 2.6× less than DeepSeek V4.1 Flash.
- For the RAG workload, GPT-6 Luna costs 2.9× less than DeepSeek V4.1 Flash.
- For the Coding agent workload, GPT-6 Luna costs 2.3× less than DeepSeek V4.1 Flash.
Prices
| USD per 1M tokens | DeepSeek V4.1 Flash | GPT-6 Luna |
|---|---|---|
| Input | $0.30 | $0.10 |
| Output | $1.20 | $0.50 |
| Cache read | $0.006 | $0.01 |
| Cache write | Not published | $0.125 |
| Batch input | Not published | $0.05 |
| Batch output | Not published | $0.25 |
| Off-peak input | $0.15 | Not published |
| Off-peak output | $0.60 | Not published |
| Off-peak cache read | $0.003 | Not published |
DeepSeek V4.1 Flash: The Input, Output and Cache read rows are the standard (peak) prices; the Off-peak rows apply at other times. Off-peak is every hour outside 01:00–04:00 and 06:00–10:00 UTC on weekdays, plus weekends and Chinese public holidays.
Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page
Monthly cost by workload
| Workload | DeepSeek V4.1 Flash | GPT-6 Luna |
|---|---|---|
| Chatbot1,000 in / 500 out tokens, 10,000 requests a day | $270.00/mo | $105.00/mo |
| RAG8,000 in / 500 out tokens, 5,000 requests a day | $450.00/mo | $157.50/mo |
| Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input | $169.20/mo | $72.00/mo |
Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.
Context and capabilities
| DeepSeek V4.1 Flash | GPT-6 Luna | |
|---|---|---|
| Context | 1,000,000 tokens | 1,050,000 tokens |
| Max output | 393,216 tokens | 128,000 tokens |
| Input | text, image | text, image, pdf |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
Questions
- What is the price difference between DeepSeek V4.1 Flash and GPT-6 Luna?
- DeepSeek V4.1 Flash: $0.30 per 1M input tokens and $1.20 per 1M output tokens. GPT-6 Luna: $0.10 per 1M input tokens and $0.50 per 1M output tokens. For the Chatbot workload (1,000 in / 500 out tokens, 10,000 requests a day), that is about $270.00 per month for DeepSeek V4.1 Flash and $105.00 for GPT-6 Luna.
- Which has the longer context window, DeepSeek V4.1 Flash or GPT-6 Luna?
- GPT-6 Luna has the longer context window: up to 1,050,000 tokens, compared with 1,000,000 for DeepSeek V4.1 Flash.
- Do DeepSeek V4.1 Flash and GPT-6 Luna have prompt caching and batch prices?
- DeepSeek V4.1 Flash: cached input $0.006 per 1M tokens; no batch price published. GPT-6 Luna: cached input $0.01 per 1M tokens; batch $0.05 per 1M input tokens and $0.25 per 1M output tokens.