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DeepSeek

DeepSeek V3.1 Terminus

Benchmarks, price, context and versions

Also searched as

DeepSeek-V3.1-Terminus

Direct answer: DeepSeek V3.1 Terminus is a model from DeepSeek. 82.4% on GPQA Diamond (OpenRouter), per OpenRouter Benchmarks. On OpenRouter, US$ 0.27 per 1 million input tokens and US$ 1.00 per 1 million output tokens.

✓ Good for

  • running on your own infrastructure (open weights)

✕ Not the best for

  • technical reasoning as the model appears through the API (#81 of 135 on GPQA Diamond (OpenRouter))
  • agents that follow rules and use tools (#70 of 131 on τ-bench Verified (airline))

This block follows a rule of this section, using source data: if the model is in the top 25% of the metric, the item goes under "Good for"; if it is in the bottom half, it goes under "Not the best for". The middle band appears in neither. Price and context use OpenRouter; scores use Epoch AI or OpenRouter Benchmarks, in the latest version we checked.

Benchmarks

τ-bench Verified (airline)

?
73%

highest score on this metric 82%

70º / 131 · OpenRouter Benchmarks, latest version we checked

Key specs

Origin
China
Family
DeepSeek Terminus provisional data
Weights?
open
License
mit
Input US$/1M?
US$ 0.27
Output US$/1M
US$ 1.00
Context?
163,840 tokens
Parameters
684,531,386,000
Input
text
OpenRouter usage?
no data
Downloads (30 days)?
9,250
Use cases provisional data
Text Agents
Dates in sources
  • 2025, listed on OpenRouter
  • 2025, Hugging Face repo created

Version history

Dates come from the sources: OpenRouter listing or Hugging Face repo creation, which may differ from the official launch.

FAQ

What is DeepSeek V3.1 Terminus?

DeepSeek V3.1 Terminus is a model from DeepSeek, with open weights, used for text, agents.

How much does DeepSeek V3.1 Terminus cost?

On OpenRouter, US$ 0.27 per 1 million input tokens and US$ 1.00 per 1 million output tokens.

What is the context window of DeepSeek V3.1 Terminus?

163,840 tokens, per OpenRouter.

Is DeepSeek V3.1 Terminus open source?

Yes, it has open weights. License: mit.

What is DeepSeek V3.1 Terminus's GPQA Diamond (OpenRouter) score?

82.4% on GPQA Diamond (OpenRouter), per OpenRouter Benchmarks.

Is DeepSeek V3.1 Terminus good for coding?

No data: there is no SWE-bench Verified measurement for it in open sources.

Who made DeepSeek V3.1 Terminus?

It was made by DeepSeek, a lab from China.

provisional data Questions under review: Semrush had no API balance during collection. Answers use source data only.

Models from DeepSeek

See lab

Sources

  • Hugging Face Hub, metadados públicos do Hub; licença de cada modelo no repositório, latest version we checked.
  • OpenRouter, dados públicos da API; exports de benchmarks e rankings em CC BY 4.0, latest version we checked.
  • OpenRouter Benchmarks, CC BY 4.0, latest version we checked.

Dates come from the sources: OpenRouter listing or Hugging Face repo creation, which may differ from the official launch. Family and version were grouped by rule from the name.