--- title: "DeepSeek: DeepSeek V3.1 Terminus — price, capability and what beats it · Undominated.ai" canonical: https://undominated.ai/models/deepseek__deepseek-v3.1-terminus/ description: "DeepSeek: DeepSeek V3.1 Terminus: $0.270/M in, $1.00/M out. Independent capability scores, and alternatives compared under recorded workload and capability requirements." --- # DeepSeek: DeepSeek V3.1 Terminus — price, capability and what beats it · Undominated.ai > DeepSeek: DeepSeek V3.1 Terminus: $0.270/M in, $1.00/M out. Independent capability scores, and alternatives compared under recorded workload and capability requirements. [Check base rates for this workload](/check/deepseek__deepseek-v3.1-terminus/) [Cheaper alternatives](/alternatives/deepseek__deepseek-v3.1-terminus/) [Family](/families/deepseek/) [Compare models](https://undominated.ai/compare/?models=deepseek%2Fdeepseek-v3.1-terminus) Comparison context Choose up to three standard models in Compare. Requirements and prompt length apply in Compare. This page keeps its stated price basis and workload controls. MODEL PROOF # DeepSeek V3.1 Terminus DeepSeek · 22 Sept 2025 Balanced Summarise Chat Code gen Agentic BETTER VALUE OPTION ## A stored alternative has an equal-or-higher measured score and an equal-or-lower price. **$0.453** / 1M tokens Balanced · 3 tokens in per 1 out Serving precision differs between offers. [GLM 5.3 Flash](/models/z-ai__glm-5.3-flash/) · Δ score 52.5 points · 48% lower measured price · $0.238 / 1M tokens [MiMo-V2.6-Flash](/models/xiaomi__mimo-v2.6-flash/) is a further stored option with these losses: 147K → 131K max output Evidence as of 06 Oct 2026 [openrouter/models](https://openrouter.ai/api/v1/models) [LMArena · cc-by-4.0](https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset) Independent LMArena score 1,417.1 ± 9.74 · 3,599 votes Context window 163.84K Maximum output 147.46K Input modalities text Output modalities text Published input price $0.270 / 1M tokens Published output price $1.00 / 1M tokens Pricing kind fixed Inspect [complete billing conditions](#billing-details) and endpoint terms below. Price from SiliconFlow: the cheapest offer that is serving, at standard delivery and at a declared precision that is not 4-bit (fp8), at its standard rate. The maker’s own precision is not known. Every price dimension · USD per million tokens | Input | $0.270 /M | | --- | --- | | Output | $1.00 /M | | Cached input | Unknown /M | | Cache write | Unknown /M | | Cache write 1h | Unknown /M | | Reasoning | Unknown /M | ### Who sells it The same weights, different shops. Cheapest is not like-for-like when serving precision differs. Headline cheapest is a lower precision. Like-for-like at the best declared precision is $0.270/M from SiliconFlow. 2 provider offers · rates, limits and conditions Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test. | Seller | Input | Output | Precision | Uptime (1d) | | --- | --- | --- | --- | --- | | Seller SiliconFlow siliconflow/fp8 Endpoint terms Cached input /M Unknown Context limit 163,840 tokens Output limit 147,456 tokens Tools Listed by endpoint Reasoning Listed by endpoint Promotional discount None reported Uptime · last 30 minutes 98.24% | Input $0.270 | Output $1.00 | Precision fp8 | Uptime (1d) 98.50% | | Seller StreamLake streamlake Endpoint terms Cached input /M Unknown Context limit 128,000 tokens Output limit 32,000 tokens Tools Not listed by endpoint Reasoning Listed by endpoint Promotional discount 40% · already included in these rates Uptime · last 30 minutes 99.86% | Input $0.343 | Output $1.03 | Precision undeclared | Uptime (1d) 99.96% | ### Independent scores | LMArena Elo | 1417.1 default | | --- | --- | LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero. #### Best rankings by task - UI components #57 1189 - Code categories #61 1179 - 3D #61 1148 - Websites #62 1193 - Data visualisation #64 1176 - SVG #70 1064 - Game development #75 1143 Per-task Elo and rank from [Design Arena](https://designarena.ai), via OpenRouter’s model feed. The rank is the feed’s, and it counts models OpenRouter does not list. ### Capability | Context window | 163K | | --- | --- | | Max output | 147K | | Input modes | text | | Tool use | yes | | Reasoning | optional | | Knowledge cutoff | 2025-03-31 | | Open weights | Unknown | ### Provenance | Price source | [openrouter.ai](https://openrouter.ai/api/v1/models) | | --- | --- | | Fetched | 2026-10-06 | | Quality data | verified | DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-v3.1) that maintains the model's original capabilities while addressing issues reported by users, including language consistency and agent capabilities, further optimizing the model's... ## Questions this page answers What does DeepSeek V3.1 Terminus cost? $0.270/M in, $1.00/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. Does DeepSeek V3.1 Terminus have an independent quality score? DeepSeek V3.1 Terminus has an LMArena score in this catalogue. What beats DeepSeek V3.1 Terminus? GLM 5.3 Flash has an equal-or-higher measured score and an equal-or-lower price. Does this page use Artificial Analysis scores for DeepSeek V3.1 Terminus? No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated. Is the cheapest DeepSeek V3.1 Terminus endpoint the same product? Headline cheapest is a lower precision. Like-for-like at the best declared precision is $0.270/M from SiliconFlow. MODEL MONUMENT ## Save or share this proof Download proof card · 1200 × 630 Preview and more sharing options DeepSeek: DeepSeek V3.1 Terminus. Balanced workload. Better value option available. Evidence as of 06 Oct 2026. Copy model link Download square card · 1080 × 1080 Copy landscape image Share landscape card ## Related - Both better and cheaper [GLM 5.3 Flash](/models/z-ai__glm-5.3-flash/) - Higher score and cheaper, with a named trade [MiMo-V2.6-Flash](/models/xiaomi__mimo-v2.6-flash/) - Nearby on the capability axis [Qwen3.5-122B-A10B](/models/qwen__qwen3.5-122b-a10b/) - Same vendor [DeepSeek V3.1](/models/deepseek__deepseek-chat-v3.1/) - DeepSeek models [DeepSeek](/providers/deepseek/) - Where this model appears [spreads](/spreads/) - Nearby on the capability axis [Gemini 2.5 Flash](/models/google__gemini-2.5-flash/) - Same vendor [DeepSeek V3.2 Exp](/models/deepseek__deepseek-v3.2-exp/) - Where this model appears [traps](/traps/) - Nearby on the capability axis [Qwen3 Next 80B A3B Instruct](/models/qwen__qwen3-next-80b-a3b-instruct/) - Same vendor [DeepSeek V3.2](/models/deepseek__deepseek-v3.2/) - Where this model appears [significance](/significance/) ## Badge The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not. Markdown Copy [![DeepSeek V3.1 Terminus — Undominated.ai dominance verdict](https://undominated.ai/badge/deepseek__deepseek-v3.1-terminus.svg)](https://undominated.ai/models/deepseek__deepseek-v3.1-terminus/) HTML Copy DeepSeek V3.1 Terminus — Undominated.ai dominance verdict Direct file: [https://undominated.ai/badge/deepseek__deepseek-v3.1-terminus.svg](https://undominated.ai/badge/deepseek__deepseek-v3.1-terminus.svg) — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never older than the last deploy. ## Continue your investigation - [Explore model families](/families/) - [Compare a shortlist](/compare/) - [Check a model](/check/) - [Understand the evidence](/methodology/)