openai
DeepSeek V4.1 Flash vs GPT-5.6 Sol
81.1 overall · $4.00 / 1M
// deepseek
DeepSeek V4.1 Flash
deepseek/deepseek-v4.1-flash
DeepSeek V4.1 Flash costs $0.100 per 1M input tokens and $0.500 per 1M output tokens with a 1.0M-token context window.
A reasoning, tool-calling model from deepseek, released Sep 10, 2026. On LiveBench it scores 81.1 overall — #6 of 55 benchmarked models — and ranks highest in agentic coding (#1).
- Input / 1M
- $0.100
- Output / 1M
- $0.500
- Context
- 1.0M
- LiveBench overall
- 81.1 · #6
Specs and pricing
| Input price USD per 1M prompt tokens | $0.100 |
|---|---|
| Output price USD per 1M completion tokens, reasoning included | $0.500 |
| Blended price 3:1 input:output — #82 cheapest of 343 listed models | $0.200 |
| Cached input read Blank means not priced separately — not free | $0.010 |
| Cache write | — |
| Context window | 1,048,576 tokens |
| Max output | 943,718 tokens |
| Input modalities | text, image |
| Tool calling | Yes |
| Extended reasoning | Yes |
| Knowledge cutoff | — |
| Listed | Sep 10, 2026 |
Also listed as deepseek/deepseek-v4.1-flash:batch ($0.168 blended)— the same model at a different price or rate limit.
Benchmarks by category
LiveBench scores out of 100, with DeepSeek V4.1 Flash's rank among the 55 benchmarked models listed here. Run: deepseek-v4.1-flash-max.
Language#23 of 55
81.2
$0.0105 measured per point
What DeepSeek V4.1 Flash costs to run
Monthly list cost across five workload shapes, using the published cached-input rate where there is one. A floor, not a quote — batch discounts and cache writes aren't included.
| Workload | Per month |
|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $57.52/mo |
| RAG assistant 8K in / 600 out × 100K requests | $74.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $69.60/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $133.00/mo |
| Bulk classification 500 in / 20 out × 5M requests | $255.00/mo |
Compare DeepSeek V4.1 Flash with
The benchmarked models closest to it on overall score.
meta
DeepSeek V4.1 Flash vs Muse Spark 1.3
81.6 overall · $2.00 / 1M
openai
DeepSeek V4.1 Flash vs GPT-5.5
80.2 overall · $11.25 / 1M
anthropic
DeepSeek V4.1 Flash vs Claude Opus 5
80.1 overall · $10.00 / 1M
openai
DeepSeek V4.1 Flash vs GPT-6 Astra
82.2 overall · $20.00 / 1M
anthropic
DeepSeek V4.1 Flash vs Claude Fable 5
83.0 overall · $20.00 / 1M
DeepSeek V4.1 Flash FAQ
How much does DeepSeek V4.1 Flash cost?
DeepSeek V4.1 Flash lists at $0.100 per 1M input tokens and $0.500 per 1M output tokens, with cached input reads at $0.010 per 1M. A RAG assistant handling 100K requests a month (8K tokens in, 600 out) comes to about $74.00 at list price.
What is the context window of DeepSeek V4.1 Flash?
DeepSeek V4.1 Flash accepts up to 1,048,576 tokens of context and can return up to 943,718 output tokens per response.
Does DeepSeek V4.1 Flash support tool calling?
Yes — DeepSeek V4.1 Flash supports tool (function) calling and exposes extended reasoning. It accepts text, image input.
How does DeepSeek V4.1 Flash score on benchmarks?
On LiveBench release 2026-06-25 (run: deepseek-v4.1-flash-max), DeepSeek V4.1 Flash scores 81.1 overall, ranking #6 of 55 benchmarked models.
What is the API model ID for DeepSeek V4.1 Flash?
On OpenRouter the model ID is "deepseek/deepseek-v4.1-flash". It was listed on Sep 10, 2026.
More from deepseek
How these numbers are produced
- Price and specs — provider list data from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores and ranks — LiveBench release 2026-06-25. Ranks count only models that have a published run; a blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.