Model comparison
DeepSeek V3.1 vs DeepSeek V3.1 Terminus
Compare DeepSeek V3.1 and DeepSeek V3.1 Terminus: input/output $/Mtoken, context window, modalities, and license. OpenRouter-synced pricing.
DeepSeek
DeepSeek V3.1
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 ba
DeepSeek
DeepSeek V3.1 Terminus
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, inc
| Metric | DeepSeek V3.1 | DeepSeek V3.1 Terminus |
|---|---|---|
| Provider | DeepSeek | DeepSeek |
| Context window | 163,840 | 163,840 |
| Input $/Mtok | $0.210 | $0.270 |
| Output $/Mtok | $0.790 | $0.950 |
| Modalities | text | text |
| License | open-weights | open-weights |
Quick take
On input price, DeepSeek V3.1 is cheaper at $0.210/Mtok. For context window, DeepSeek V3.1 leads with 163,840 tokens.
Pick based on your workload: high-volume cheap inference vs long-document / agent loops. Enterprise DNA can wire either model into Omni with evals, secrets, and job orchestration.