AI Recommendation
Should you use DeepSeek V4.1 Flash?
DeepSeek V4.1 Flash is listed for chat workloads and supports a 1.0M context window.
Use it when OpenCode Zen's free tier is enough for evaluation, demos, or light production traffic.
DeepSeek V4.1 Flash Free API on OpenCode Zen
Free API VerifiedDeepSeek V4.1 Flash model for reasoning and agentic coding
Free APIOpenAI compatibleReasoningTool callingJSON modeVisionReasoning
API Details
Copy-ready connection details
Base URL
https://opencode.ai/zen/v1 Model ID
deepseek-v4.1-flash API format OpenAI Chat Completions
Technical Details
DeepSeek V4.1 Flash specifications
Context window 1.0M
Max output 384K
Status Online
Family deepseek-flash
Knowledge cutoff 2025-05
Released Sep 10, 2026
Last updated Sep 10, 2026
Free listing since Sep 10, 2026
Input text, image
Output text
Capabilities reasoning, tool calling, structured output, file attachments, temperature control
Open weights Yes
Weights Hugging Face
External benchmark references
| Benchmark | Score | Metric | Date |
|---|---|---|---|
| GPQA Diamond | 90.9 | pass@1 | Not listed |
| MathArena Apex | 65.6 | pass@1 | Not listed |
| Humanity's Last Exam | 36.8 | pass@1 | Not listed |
| Humanity's Last Exam | 39.1 | pass@1 | Not listed |
Best for
- Chat
Benchmark Overview
Benchmark signals for DeepSeek V4.1 Flash
Intelligence General reasoning and instruction following
39.5/100 Speed Observed generation speed
179 tok/s Context Maximum listed context window
1.0M Pricing
DeepSeek V4.1 Flash pricing per 1M tokens
Input $0.3 per 1M tokens
Output $1.2 per 1M tokens
Access Available OpenCode Zen
Availability
DeepSeek V4.1 Flash availability by provider
We found 3 provider listings for deepseek-v4-1-flash. Check model ID, quota, pricing, and API format before switching providers.
| Provider | Model listing | Access | Context | API | Limits |
|---|---|---|---|---|---|
| | DeepSeek V4.1 Flash | Free tier | 1.0M | Native | Varies |
| | deepseek-ai/deepseek-v4.1-flash | Free tier | 1.0M | OpenAI-style | Up to 40 RPM |
| | deepseek-ai/DeepSeek-V4.1-Flash | Free tier | 8K | Native | Varies |
Compare
DeepSeek V4.1 Flash alternatives to consider
| Model | Provider | Context | Access |
|---|---|---|---|
| deepseek-ai/deepseek-v4.1-flash | NVIDIA NIM | 1.0M | Free tier |
| deepseek-ai/DeepSeek-V4.1-Flash | ModelScope | 8K | Free tier |
| big-pickle | OpenCode Zen | N/A | Free tier |
| DeepSeek V4 Flash | OpenCode Zen | 1.0M | Check provider |
| MiMo-V2.5 | OpenCode Zen | 1.0M | Check provider |
Typical Use Cases
DeepSeek V4.1 Flash use cases
Chat
DeepSeek V4.1 Flash is tagged for chat in this catalog and works with OpenAI-compatible client libraries.
FAQ
DeepSeek V4.1 Flash free API FAQ
Is DeepSeek V4.1 Flash free to use?
DeepSeek V4.1 Flash is listed with free API access on OpenCode Zen, subject to the provider's quota and account policy.
What is the DeepSeek V4.1 Flash model ID?
The model ID shown in this catalog is deepseek-v4.1-flash.
What context window does DeepSeek V4.1 Flash support?
The listed context window is 1.0M tokens with up to 384K output tokens.
More about DeepSeek V4.1 Flash
Free DeepSeek V4.1 Flash API.
For API keys, setup steps, and provider-level limits, see the OpenCode Zen provider page.