Competition
DeepSeek's Open Flash Update Edges Opus 5 on Its Own Coding Test and Prices Agent Web Search at $0.75 per 1,000 Calls (October 17, 2026)
DeepSeek released V4.1-Flash-1017 on October 17 with free MIT-licensed weights, priced at $0.15 per million input tokens and $0.60 per million output tokens off-peak. On DeepSWE v1.1, DeepSeek reports 77.0 versus 74.0 for Claude Opus 5, though Opus 5 still leads on Humanity's Last Exam and Terminal-Bench 4.0. It also opened Search and Fetch APIs for agents at $0.75 per 1,000 successful calls, against $5 and up for rivals in The Neuron's price roundup. Billing for calls through Claude Code, Codex and DeepSeek's own harness starts November 1, Beijing time.
So what
The cost floor for routine coding and agent web retrieval dropped again, following last week's Muse and Argon launches. Have engineering benchmark one high-volume workload, such as test generation or agent research, on this model through a US host before your next renewal with a closed-model vendor. Keep confidential data off DeepSeek's own servers, and check customer contracts first, since several governments restrict DeepSeek services.
Hype check
The 77.0 coding score is DeepSeek's own and has not been independently reproduced. The Neuron calls it a great-value coder, not a new smartest model.
Confidence: Established fact — the release and prices are documented by DeepSeek; benchmark claims are self-reported.
Go deeper DeepSeek API Docs · The Neuron
