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 …
Model details →DeepSeek: DeepSeek V3.1 Terminus (exacto) vs Body Builder (beta)
DeepSeek: DeepSeek V3.1 Terminus (exacto) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Transform your natural language requests into structured OpenRouter API request objects. Describe what you want to accomplish with AI models, and Body Builder will construct the appropriate API calls. Example: "count to 10 using gemini and …
Model details →Side-by-side comparison
| Capability | DeepSeek: DeepSeek V3.1 Terminus (exacto) | Body Builder (beta) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 164K | 128K | 🏆 DeepSeek: DeepSeek V3.1 Terminus (exacto) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.21 | $-1000000.00 | 🏆 Body Builder (beta) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.79 | $-1000000.00 | 🏆 Body Builder (beta) |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | — | 🏆 DeepSeek: DeepSeek V3.1 Terminus (exacto) |
| Vision input Accepts image inputs alongside text. | — | — | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | — | 🏆 DeepSeek: DeepSeek V3.1 Terminus (exacto) |
Frequently asked questions
Is DeepSeek: DeepSeek V3.1 Terminus (exacto) better than Body Builder (beta)?
DeepSeek: DeepSeek V3.1 Terminus (exacto) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between DeepSeek: DeepSeek V3.1 Terminus (exacto) and Body Builder (beta)?
Input: $0.21 vs $-1000000.00 per 1M tokens. Output: $0.79 vs $-1000000.00 per 1M tokens.
What context windows do DeepSeek: DeepSeek V3.1 Terminus (exacto) and Body Builder (beta) support?
DeepSeek: DeepSeek V3.1 Terminus (exacto) supports up to 164K tokens. Body Builder (beta) supports up to 128K tokens.
Do both DeepSeek: DeepSeek V3.1 Terminus (exacto) and Body Builder (beta) support tool calling?
DeepSeek: DeepSeek V3.1 Terminus (exacto): yes. Body Builder (beta): not advertised.