// DeepSeek
DeepSeek V3.1 Terminus
A DeepSeek model. 3 prices across 1 channels side by side, each with its source and check date – plus specs, licence, speed and benchmarks.
- Official in/out per 1M
- —
- Lowest (SiliconFlow)
- $0.27 / $1
- Context
- 164K
- AA index
- 13.9
Prices checked 2026-10-22Official sources linked on every rowNo estimatesCheapest LLM APIs →
01Specs at a glance
Official values first; gaps filled from OpenRouter’s API where the vendor page is silent.
| Vendor | DeepSeek |
|---|---|
| Context window | 164K (163,840 tokens) |
| Max output | 147K |
| Input | Text |
| Output | Text |
| Tool calling / JSON | Yes / Yes |
| Weights & licence | Open weights · MIT · Hugging Face |
| Parameters | 685B (from weight files) |
| Released | Sep 22, 2025 |
| Model IDs | deepseek/deepseek-v3.1-terminus · deepseek-ai/DeepSeek-V3.1-Terminus · Pro/deepseek-ai/DeepSeek-V3.1-Terminus |
02Prices on 1 channels
Per 1M tokens, in the currency each source publishes (1 USD = 6.7 CNY for the blended column). Sorted: official first, then cheapest.
| Channel | Source | Input | Output | Cache hit | Blended $ | Context | Notes |
|---|---|---|---|---|---|---|---|
| SiliconFlow · fp8 Via OpenRouter / provider listed there | OpenRouter 10-22 | $0.27 | $1 | — | 0.453 | 164K | SiliconFlow price as listed on OpenRouter (pass-through; quantization=fp8; discount field=0); not checked against SiliconFlow's own page |
| SiliconFlow Inference platform (own price page) | Platform 10-10 | ¥4 | ¥12 | ¥0.4 | 0.896 | — | SiliconFlow (硅基流动) own pricing page |
| SiliconFlow Inference platform (own price page) | Platform 10-10 | ¥4 | ¥12 | ¥0.4 | 0.896 | — | SiliconFlow (硅基流动) own pricing page |
“Official” = vendor pricing page; “Platform” = the platform’s own pricing page; “OpenRouter” = price listed on OpenRouter, not checked on the platform’s site. Click a source tag to open the original page.
03Where you can use it
Derived only from the price sources above. Country restrictions are set by each vendor – check their terms before you sign up.
- Via OpenRouter / provider listed there
SiliconFlow - Inference platform (own price page)
SiliconFlow - Self-host the open weights
GPU / VRAM sizing and build plans→
04Performance
Speed and AA index from Artificial Analysis public leaderboards (not our own tests); benchmark scores from our benchmark library, best result per benchmark.
- AA indexDeepSeek V3.1 Terminus (Non-reasoning)
- 13.9
- Output speed (median)
- 44 tok/s
- Time to first token
- 1s
- AA index per $ (blended)
- 30.79
| Benchmark | Best score | Source | Date |
|---|---|---|---|
| LMArena Text | 1416 | official | 2026-10-08 |
05Price changes we recorded
All price changes →From our daily re-checks of the sources above.
No price change recorded since we started tracking (2026-10-10).
06More from DeepSeek
- DeepSeek V4.1 Flash 1017
$0.098 / 0.294 · 1.05M→ - DeepSeek V4.1 Flash
$0.14 / 0.42 · 1M→ - DeepSeek V4 Flash Vision Exp
$0.216 / 0.647 · 1.05M→ - DeepSeek-V4-Flash
$0.06 / 0.18 · 1.05M→ - DeepSeek-V4-Pro
$0.957 / 1.91 · 1M→ - DeepSeek V3
$0.209 / 0.31 · 164K→ - DeepSeek V3.2 Exp
$0.27 / 0.41 · 164K→ - DeepSeek-V3.1
$0.25 / 0.95 · 164K→
FAQ
How much does the DeepSeek V3.1 Terminus API cost?
There is no official pay-as-you-go price in our data. The lowest listed price is $0.27 / $1 on SiliconFlow.
What is the context window of DeepSeek V3.1 Terminus?
164K tokens of context, up to 147K output tokens. Platforms may cap it lower – see the table.
Is DeepSeek V3.1 Terminus open source?
Yes, the weights are published on Hugging Face (deepseek-ai/DeepSeek-V3.1-Terminus). Licence: MIT.