DeepSeek releases V4.1-Flash-1017 and opens access to its Search API
DeepSeek upgraded V4.1 Flash to DeepSeek-V4.1-Flash-1017, replacing it simultaneously on the web, in the app, and via the API. The API usage method and pricing remain unchanged, and it is still accessed with deepseek-flash. DeepSeek said the new version improved by 2.0 to 11.1 points over the September version across all 11 benchmarks, while reducing task runtime and output length. It also recommends upgrading to DeepSeek Harness 0.2.1-rc.1 or later. Regarding the weights, IT Home reported that downloads were made available at the same time under the MIT license, while MarkTechPost said that the 1017 weights and hardware requirements had not been disclosed. OpenRouter launched the model on the same day, with DeepSeek as the first provider to integrate it. Listed pricing is $0.15 per million input tokens and $0.60 per million output tokens, with a 1.05M context window; routing within the European Union is not currently supported. The self-developed Search API launched with the new version includes two interfaces, Search and Fetch, each priced at 5 yuan per 1,000 calls. DeepSeek said these calls are currently free and will begin being charged per call at 00:00 Beijing Time on November 1, 2026; The Decoder …
Latest developmentsYuchen Jin said DeepSeek-V4.1-Flash-1017 achieves Opus 5-level coding performance at 1/83 of the cost
