// Get open-weight models

DeepSeek V4.1 Flash 1017

2026-10-17 minor update of DeepSeek V4.1 Flash (open weights, MIT, image input). The official deepseek-flash API now serves it at unchanged prices: peak ¥2/¥8 per 1M input/output, cache hit ¥0.04, 50% off off-peak. #1 on OpenRouter trending this week. Model card: Terminal-Bench 4.0 42.3 (vs 31.2 for V4.1 Flash)

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DeepSeek V4.1 Flash 1017 is 2026-10-17 minor update of DeepSeek V4.1 Flash (open weights, MIT, image input). The official deepseek-flash API now serves it at unchanged prices: peak ¥2/¥8 per 1M input/output, cache hit ¥0.04, 50% off off-peak. #1 on OpenRouter trending this week. Model card: Terminal-Bench 4.0 42.3 (vs 31.2 for V4.1 Flash).

Good for: Developers and teams who want to get open-weight models.

01How to start

1Read the official quick-start (link above).
2Install or sign up as the official guide describes.
3Try it on a small example before wiring it into a project.

02Alternatives & comparison

Compare side by side →

DeepSeek-V3 Open-weight models ★ 105k Qwen3 Qwen3 is the large language model series developed by Qwen team, Alibaba Cloud. ★ 28k gpt-oss gpt-oss-120b and gpt-oss-20b are two open-weight language models by OpenAI ★ 20k Qwen3-Coder Qwen3-Coder is the code version of Qwen3, the large language model series developed by Qwen team. ★ 17k Kimi-K2 Kimi K2 is the large language model series developed by Moonshot AI team ★ 11k

Versions, why it is listed, for AI to read

For AI agents

Interfaces：its own app or website
Machine-readable record：/api/v1/software/deepseek-v4-1-flash.json · llms.txt
Added 2026-10-19