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 vs EssentialAI: Rnj 1 Instruct
DeepSeek: DeepSeek V3.1 Terminus and EssentialAI: Rnj 1 Instruct are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
Rnj-1 is an 8B-parameter, dense, open-weight model family developed by Essential AI and trained from scratch with a focus on programming, math, and scientific reasoning. The model demonstrates strong performance across multiple programming …
Model details →Side-by-side comparison
| Capability | DeepSeek: DeepSeek V3.1 Terminus | EssentialAI: Rnj 1 Instruct | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 164K | 33K | 🏆 DeepSeek: DeepSeek V3.1 Terminus |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.27 | $0.15 | 🏆 EssentialAI: Rnj 1 Instruct |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $1.00 | $0.15 | 🏆 EssentialAI: Rnj 1 Instruct |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | — | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | — | 🏆 DeepSeek: DeepSeek V3.1 Terminus |
Frequently asked questions
Is DeepSeek: DeepSeek V3.1 Terminus better than EssentialAI: Rnj 1 Instruct?
DeepSeek: DeepSeek V3.1 Terminus and EssentialAI: Rnj 1 Instruct are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between DeepSeek: DeepSeek V3.1 Terminus and EssentialAI: Rnj 1 Instruct?
Input: $0.27 vs $0.15 per 1M tokens. Output: $1.00 vs $0.15 per 1M tokens.
What context windows do DeepSeek: DeepSeek V3.1 Terminus and EssentialAI: Rnj 1 Instruct support?
DeepSeek: DeepSeek V3.1 Terminus supports up to 164K tokens. EssentialAI: Rnj 1 Instruct supports up to 33K tokens.
Do both DeepSeek: DeepSeek V3.1 Terminus and EssentialAI: Rnj 1 Instruct support tool calling?
DeepSeek: DeepSeek V3.1 Terminus: yes. EssentialAI: Rnj 1 Instruct: yes.