DeepSeek-V3.1-Terminus vs Gemini 2.5 Flash
API pricing, benchmark indices and specs — updated 19 October 2026.
deepseek-ai · A · Open weights
Params
684.5 B
Context
163,840
30d
13 K
mit · commercial OK
google · B · API-only
Input / 1M
$0.30
Output / 1M
$2.50
AA index
15.5
proprietary · 1M context
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | DeepSeek-V3.1-Terminus | Gemini 2.5 Flash |
|---|---|---|
| Deployment | Open weights · also via API | API-only (closed weights) |
| Parameters | 684.5 B | n/a — API-only |
| Architecture | DeepseekV3ForCausalLM | n/a — API-only |
| Context length | 163,840 | 1,048,576 |
| Licence | mit | Proprietary |
| Commercial use | Allowed | Per API terms |
| Languages | — | n/a — API-only |
| Downloads 30d | 13,067 | n/a — API-only |
| Downloads all time | 272 K | n/a — API-only |
| Quantizations on the Hub | SAFETENSORS | n/a — API-only |
| Gated | No | n/a — API-only |
| First seen on the Hub | 2025-09-22 | n/a — API-only |
| API input price / 1M tokens | $0.27 | $0.30 |
| API output price / 1M tokens | $1.00 | $2.50 |
| Est. cost per 1M input + 1M output tokens | $1.27 | $2.80 |
| Cached input / 1M tokens | — | $0.03 |
| AA Intelligence Index | 14.8 | 15.5 |
| AA Coding Index | 43.5 | — |
| AA Agentic Index | 6.8 | — |
| Max output tokens | 147,456 | 65,535 |
| API providers | 2 | 1 |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
DeepSeek-V3.1-Terminus
$1.27
Gemini 2.5 Flash
$2.80
DeepSeek-V3.1-Terminus is 2.2× cheaper at list price.
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
DeepSeek-V3.1-Terminus · fp16 @ 160K ctx
2,811.5 GB / 24 GB