# Deepseek launches V4.1 Flash 1017 model with 1 M token context

Digest AI · Generative AI & Models · published 2026-10-23T12:00:00Z

Canonical: https://digestai.news/story/deepseek-launches-v4-1-flash-1017-model-with-1-m-token-context

## Summary

Deepseek announced the V4.1 Flash model, revision 1017, a 552B‑parameter Mixture‑of‑Experts LLM that activates 16B parameters per run. The multimodal model accepts text and images and supports a 1 million token context window. Deepseek’s internal benchmarks place it between GPT‑5.6 Sol and Claude Opus 5, and it outperforms Anthropic’s LLM on task tests.

The upgrade cuts hardware needs dramatically: V4.1 uses only one‑quarter of the HBM and one‑eighth of SSD storage for its KV cache compared with the prior version, and each token entry occupies 890 bytes. Pricing is $0.15 per million input tokens and $0.6 per million output tokens, dropping to $0.003 per input token on cache hits. Search queries cost $0.75 per 1,000 queries, cheaper than Parallel’s $1. Artificial Analysis ranks DSF‑1017 #2 in the large open‑weight class with a score of 45, while Claude Opus 5.5 scores 58. The model answers correctly 43% of the time but hallucinates on 67% of non‑answers, earning 5 points on the benchmark’s main index.

## Key points

- Hardware use drops to one‑quarter HBM and one‑eighth SSD; token entry size 890 bytes
- Pricing: $0.15 input, $0.6 output per million tokens; $0.003 cache‑hit input cost

## Why it matters

A cheap, efficient open‑weight model expands access to high‑capacity AI, but its hallucination rate limits use for fact‑critical tasks.

## Sources

1. [Deepseek's latest AI model is smarter than ever, but its low running costs come at a price](https://tomshardware.com/tech-industry/artificial-intelligence/deepseeks-latest-ai-model-is-smarter-than-ever-but-its-low-running-costs-come-at-a-price-open-weight-model-is-fit-for-agentic-workloads-but-is-more-prone-to-hallucination-than-proprietary-competitors) (Tom's Hardware, 2026-10-23)

Part of the developing story: [DeepSeek Unveils Flash Model And Open Source Tools](https://digestai.news/thread/deepseek-open-sources-deepinfer-stack-potentially-lowering-inference-costs) (2 stories)

## Cite

Digest AI, "Deepseek launches V4.1 Flash 1017 model with 1 M token context", 23 October 2026, https://digestai.news/story/deepseek-launches-v4-1-flash-1017-model-with-1-m-token-context

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