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DeepSeek V3.1 Terminus
deepseek·deepseek/deepseek-v3.1-terminus-2·GA·Open weights·deepseek series
DeepSeek chat model for instruction following, coding, and analysis
At a glance
Reference price$0.27 / $1.00 per 1M
Cache read — · Abacus
Lowest paid$0.25 / $0.70
NanoGPT Gateway · 1.1× spread
Context128,000
⚠ Providers report 128,000–163,840; the table below is authoritative
Output limit8,192
Capabilities
✓ Reasoning✓ Tool use✓ Structured output✓ TemperatureAttachments
⚠ Providers report capability flags inconsistently
Modalities
Text
Knowledge cutoff2025-03-31
Released / updated2025-09-22 / 2025-09-22
Quality & performanceArtificial Analysis · Intelligence Index v4.1 · rep. tier Reasoning
Intelligence31.4
Value87
Coding43.5
Agentic19.9
Output speed—
TTFT—
Value formulaIQ 31.4 ÷ min blended $0.362 = 87
Reasoning tier → intelligence / speed (higher tier = stronger but slower)
Non-reasoningIQ 21.7
ReasoningIQ 31.4
Quality is independently evaluated by Artificial Analysis. Speed/latency are model-level medians.
Available at 6 providers6 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| NanoGPT deepseek-ai/DeepSeek-V3.1-Terminus | Gateway | $0.25 | $0.70 | $0.125 | — | 128,000 | 65,536 | |
| OpenRouter deepseek/deepseek-v3.1-terminus | Gateway | $0.27 | $1.00 | $0.135 | — | 163,840 ⚠ | 32,768 | |
| Helicone deepseek-v3.1-terminus | Gateway | $0.27 | $1.00 | $0.216 | — | 128,000 | 16,384 | |
| Vercel AI Gateway deepseek/deepseek-v3.1-terminus | Cloud | $0.27 | $1.00 | $0.135 | — | 131,072 ⚠ | 65,536 | |
| NovitaAI deepseek/deepseek-v3.1-terminus | Gateway | $0.27 | $1.00 | $0.135 | — | 131,072 ⚠ | 32,768 | |
| Abacus deepseek-ai/DeepSeek-V3.1-Terminus | Gateway | $0.27 | $1.00 | — | — | 128,000 | 8,192 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1NanoGPT$70.00
2OpenRouter$87.80
3Vercel AI Gateway$87.80
4NovitaAI$87.80
5Helicone$97.52
6Abacus$104.00
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
Toggle (on / off)
2 / 6 providers expose no reasoning control (reasoning_options: []).
Related models
DeepSeek V4 Flash Latestsame series$0.14 / $0.28DeepSeek V3.2 TEEsame series$1.00 / $1.00DeepSeek V4 Flash 0423same series$0.138 / $0.275DeepSeek V4 Flashcheaper alternative$0.14 / $0.28GPT-5 Nanocheaper alternative$0.05 / $0.40GLM-4.7-Flashcheaper alternative$0 / $0MiMo-V2.5cheaper alternative$0.14 / $0.28
Price historyone sample accumulated per data sync
Input listOutput listMin blended