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DeepSeek V3.1 Terminus pricing & benchmarks

DeepSeek V3.1 Terminus is available from DeepSeek at $0.270 per million input tokens and $1.00 per million output tokens ($0.453 blended at 3:1). It accepts up to 163,840 tokens of context. 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 …

Pricing
Per million tokens · OpenRouter
Input$0.270
Output$1.00
Blended (3:1)$0.453
Specification
deepseek/deepseek-v3.1-terminus
Context window164K
Max output147K
ReleasedSep 2025
LicenceOpen weights
Modalitiesin:text, out:text
No independently-run benchmark scores are published for DeepSeek V3.1 Terminus yet. We show nothing rather than reprinting an unverified figure.
Where to run DeepSeek V3.1 Terminus
2 hosts · 1.1× between cheapest and dearest. Blended at 3:1. ⚠ marks an option serving less context than the best available, or re-pricing above a prompt-length threshold. Bracketed labels are the provider's own service tier or region.
HostBlended $/1MIn / OutContextWeightsUptime 24h
SiliconFlow $0.453 $0.270 / $1.00 164K fp8 98.8%
StreamLake
⚠ 128K context, not 164K
 $0.514 $0.343 / $1.03 128K — 99.9%
Host prices and uptime from OpenRouter, synced 2026-10-22. Lower-precision weights (fp4, fp8) can cost less and score worse than the same model at bf16 — the score above is not host-specific.
Compare DeepSeek V3.1 Terminus
DeepSeek V3.1 Terminus vs Gemini 3.7 Flash DeepSeek V3.1 Terminus vs Grok 4.6 DeepSeek V3.1 Terminus vs Inkling Small DeepSeek V3.1 Terminus vs Qwen3.7 Flash DeepSeek V3.1 Terminus vs Claude Opus 5 DeepSeek V3.1 Terminus vs Gemini 3.6 Flash DeepSeek V3.1 Terminus vs Gemini 3.5 Flash Lite DeepSeek V3.1 Terminus vs Inkling
FAQ
How much does DeepSeek V3.1 Terminus cost?
DeepSeek V3.1 Terminus costs $0.270 per million input tokens and $1.00 per million output tokens on OpenRouter. At a 3:1 input:output mix that blends to $0.453 per million tokens.
What is DeepSeek V3.1 Terminus's context window?
DeepSeek V3.1 Terminus accepts up to 163,840 tokens of context, and can generate up to 147,456 output tokens.