---
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, context-tier pricing, and the models that are both better and cheaper."
---

# 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, context-tier pricing, and the models that are both better and cheaper.

[Leaderboard](/) / DeepSeek

# DeepSeek V3.1 Terminus

DeepSeek · released 2025-09-22

 $0.453 per million tokens, balanced Balanced Summarise Chat Code gen Agentic

## DeepSeek V4 Flash 0731 is both better and cheaper.

It scores **+20.4** higher and costs **77% less** ($0.105/M against $0.453/M) on this workload — and it does everything this model does.

### Every price dimension

| Input | $0.270 /M |
| --- | --- |
| Output | $1.00 /M |
| Cached input | $0.135 /M |

### Independent scores

| Intelligence | 31.4 |
| --- | --- |
| Coding | 43.5 |
| Agentic | 19.9 |
| LMArena Elo | 1419.6 thinking |

Sources are listed separately rather than averaged. Across the 62 models both have scored they correlate at r = 0.806 — close agreement overall, but four models rank very differently between them, and a blended score would hide exactly those.

### Capability

| Context window | 164K |
| --- | --- |
| Max output | 33K |
| Input modes | text |
| Tool use | yes |
| Reasoning | optional |
| Knowledge cutoff | 2025-03-31 |

### Provenance

| Price source | openrouter.ai |
| --- | --- |
| Fetched | 2026-08-24 |
| 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...