DeepSeek V4.1 Flash 1017

CHECKPOINT LEAP

Oct 17, 2026 checkpoint of DeepSeek V4.1 Flash: substantially stronger reasoning, agentic coding, and visual reasoning - Terminal-Bench 4.0 42.3% (vs 31.2% prior), DeepSWE v1.1 77.0%, ProgramBench 29.1% (vs 20.3%) - while reducing task time and output length on the same $0.15/$0.60 pricing and advancing the performance-cost Pareto frontier.

Context

1,048,576 tokens

Architecture

763B MoE (mixed-precision HF checkpoint)

Official API (1M)

$0.15 in / $0.6 out (Open)+ Weights Free to Self-Host

License

MIT

Published benchmarks · lab-reported

Vendor-published figures, not independently reproduced. Sources in Verification below.

SWE-BENCH

77.0% (DeepSWE v1.1)

TERMINAL-BENCH

42.3% (Terminal-Bench 4.0)

Quickstart

curl -s https://modelregistry.tirup.in/api/cli?model=deepseek-v4-1-flash-1017

OFFICIAL ANNOUNCEMENT WEIGHTS / REPOSITORY

BACK TO LEDGER

Sources

DeepSeek-V4.1-Flash-1017 release · DeepSeek
DeepSeek-V4.1-Flash-1017 open weights and model card · DeepSeek
DeepSeek V4.1 Flash 1017 listing and pricing · OpenRouter

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