DeepSeek V3.1
by DeepSeek · deepseek/deepseek-chat-v3.1 · #108 cheapest of 325 paid models
Prices updated Jul 22, 2026, 2:49 AM UTC · refreshed hourly
DeepSeek-V3.1 is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes via prompt templates. It extends the DeepSeek-V3 base with a two-phase long-context...
Compare vs:Claude Sonnet 5Claude Opus 4.6Claude Haiku 4.5GPT-5.6 Sol
Pricing
Input
$0.25
per 1M tokens
Output
$0.95
per 1M tokens
Blended (3:1)
$0.425
3 input : 1 output
Cache read
$0.13
per 1M cached tokens
Cache write
—
per 1M tokens
Cache & batch economics
Effective prices for DeepSeek V3.1 with prompt caching.
| Cache hit rate | Effective blended $/1M | Example request* | vs no cache |
|---|---|---|---|
| 0% | $0.425 | $0.0265 | — |
| 50% | $0.38 | $0.0205 | −23% |
| 90% | $0.344 | $0.0157 | −41% |
*Example: 100K sticky context + 2K new input + 1K output. Batch discount is an approximate 50% off list rates (available for OpenAI / Anthropic / Google — not flagged for this creator). Confirm on the vendor’s pricing page.
What a request costs
| Workload | Input tokens | Output tokens | Cost / request | Cost / 1K requests |
|---|---|---|---|---|
| Short chat message | 500 | 300 | $0.00041 | $0.41 |
| Document summary | 8,000 | 1,000 | $0.00295 | $2.95 |
| Codebase question (RAG) | 30,000 | 2,000 | $0.0094 | $9.40 |
| Long-context analysis | 150,000 | 5,000 | $0.0422 | $42.25 |
Performance
Intelligence Index
21
AA composite quality
Coding Index
—
Math Index
49.7
Agentic Index
—
Output speed
0 tok/s
median
Time to first token
0s
median
Time to first answer
0s
after reasoning tokens
Artificial Analysis benchmarks
| Benchmark | Score |
|---|---|
| MMLU-Pro | 83.3% |
| GPQA Diamond | 73.5% |
| Humanity's Last Exam | 6.3% |
| LiveCodeBench | 57.7% |
| SciCode | 36.7% |
| AIME 2025 | 49.7% |
| IFBench | 37.8% |
| AA-LCR (Long Context Reasoning) | 45.0% |
| Terminal-Bench Hard | 24.2% |
| τ²-Bench (Telecom) | 34.8% |
Design Arena Elo
| Category | Elo |
|---|---|
| Website | 1,150 |
| UI components | 1,126 |
| Data viz | 1,136 |
| SVG | 1,014 |
| 3D | 1,136 |
| Game dev | 1,143 |
| Code categories | 1,145 |
Specs
Context window
164K
tokens
Max output
33K
tokens
Input modalities
text
Tokenizer
DeepSeek