DeepSeek / deepseek/deepseek-v4.1-flash-free
DeepSeek V4.1 Flash (Free) - access through LLMTR
DeepSeek V4.1 Flash (Free) is DeepSeek V4.1 Flash at no charge until 16 October 2026, 23:59 (TRT); it closes earlier if the quota set aside for free use runs out. Free use is limited per account per day. The 1,048,576-token window is shared between input and output, and one response can be at most 393,216 tokens. It accepts image input (base64 or an https link), tool calling, JSON mode and schema-constrained output. Thinking is on by default and `reasoning_effort` is not accepted; thinking tokens count toward `max_tokens`, so keep it generous.
Technical specifications
| Canonical ID | deepseek/deepseek-v4.1-flash-free |
|---|---|
| Provider | DeepSeek |
| Context window | 1,048,576 tokens |
| Operations | CHAT_COMPLETIONS |
| Modalities | text, image |
Pricing
An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| CHAT_COMPLETIONS | INPUT_TEXT | PER_1M_TOKENS | Not available |
| CHAT_COMPLETIONS | CACHE_READ | PER_1M_TOKENS | Not available |
| CHAT_COMPLETIONS | OUTPUT_TEXT | PER_1M_TOKENS | Not available |
Example usage
With existing OpenAI SDK flows, change only the base URL and model identifier.
curl https://llmtr.com/v1/chat/completions -H "Authorization: Bearer llmtr-your_key" -H "Content-Type: application/json" -d '{"model":"deepseek/deepseek-v4.1-flash-free","messages":[{"role":"user","content":"Hello"}]}'Related models
- DeepSeek V4.1 Flash deepseek/deepseek-flash
- DeepSeek V4 Pro deepseek/deepseek-v4-pro
- DeepSeek V4 Pro 0813 deepseek/deepseek-v4-pro-0813
- Gemma 4 llmtr/gemma-4
- Qwen 3.6 35B-A3B llmtr/qwen3-6-35b
- Qwen 3.8 27B llmtr/qwen3-8-27b
- Trendyol Asure 12B llmtr/trendyol-asure-12b
- Magibu 11B v8 llmtr/magibu-11b-v8