DeepSeek-V4.1-Flash-1017

条件：Recorded on 2026-10-20; the pricing page states 'Use deepseek-flash as the model name' and that legacy names such as deepseek-v4-flash are mapped to this version.

证据：Model details for deepseek-flash: model version DeepSeek-V4.1-Flash-1017; supports both non-thinking and thinking modes; context length 1M; max output 384K; features include JSON output, tool calls, Responses API, Anthropic API, chat prefix completion (beta), FIM completion (beta) and vision. Pricing per 1M tokens in USD: cache-hit input off-peak $0.003 and peak $0.006; cache-miss input off-peak $0.15 and peak $0.3; output off-peak $0.6 and peak $1.2; concurrency limit 2500. Notes state that deepseek-flash is the model name, off-peak rates are half of peak rates, peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday through Friday excluding Chinese public holidays, and the legacy name deepseek-v4-flash is still accepted but its model has been retired and is served by DeepSeek-V4.1-Flash-1017 at the Flash price.

条件：Set on 2026-10-20 from the pricing page feature table: vision is supported for deepseek-flash, tool calls and Responses API are supported, and the model supports thinking and non-thinking modes.

证据：Model details for deepseek-flash: model version DeepSeek-V4.1-Flash-1017; supports both non-thinking and thinking modes; context length 1M; max output 384K; features include JSON output, tool calls, Responses API, Anthropic API, chat prefix completion (beta), FIM completion (beta) and vision. Pricing per 1M tokens in USD: cache-hit input off-peak $0.003 and peak $0.006; cache-miss input off-peak $0.15 and peak $0.3; output off-peak $0.6 and peak $1.2; concurrency limit 2500. Notes state that deepseek-flash is the model name, off-peak rates are half of peak rates, peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday through Friday excluding Chinese public holidays, and the legacy name deepseek-v4-flash is still accepted but its model has been retired and is served by DeepSeek-V4.1-Flash-1017 at the Flash price.

条件：Recorded on 2026-10-20 from the pricing page model details: context length 1M.

证据：Model details for deepseek-flash: model version DeepSeek-V4.1-Flash-1017; supports both non-thinking and thinking modes; context length 1M; max output 384K; features include JSON output, tool calls, Responses API, Anthropic API, chat prefix completion (beta), FIM completion (beta) and vision. Pricing per 1M tokens in USD: cache-hit input off-peak $0.003 and peak $0.006; cache-miss input off-peak $0.15 and peak $0.3; output off-peak $0.6 and peak $1.2; concurrency limit 2500. Notes state that deepseek-flash is the model name, off-peak rates are half of peak rates, peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday through Friday excluding Chinese public holidays, and the legacy name deepseek-v4-flash is still accepted but its model has been retired and is served by DeepSeek-V4.1-Flash-1017 at the Flash price.

条件：Set on 2026-10-20 from the pricing page: the model is served through the DeepSeek API at https://api.deepseek.com in OpenAI and Anthropic compatible formats.

证据：Model details for deepseek-flash: model version DeepSeek-V4.1-Flash-1017; supports both non-thinking and thinking modes; context length 1M; max output 384K; features include JSON output, tool calls, Responses API, Anthropic API, chat prefix completion (beta), FIM completion (beta) and vision. Pricing per 1M tokens in USD: cache-hit input off-peak $0.003 and peak $0.006; cache-miss input off-peak $0.15 and peak $0.3; output off-peak $0.6 and peak $1.2; concurrency limit 2500. Notes state that deepseek-flash is the model name, off-peak rates are half of peak rates, peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday through Friday excluding Chinese public holidays, and the legacy name deepseek-v4-flash is still accepted but its model has been retired and is served by DeepSeek-V4.1-Flash-1017 at the Flash price.

条件：Recorded on 2026-10-20 as the peak cache-miss input rate; off-peak is half of peak ($0.15) and peak hours are 01:00-04:00 and 06:00-10:00 UTC on weekdays excluding Chinese public holidays.

证据：Model details for deepseek-flash: model version DeepSeek-V4.1-Flash-1017; supports both non-thinking and thinking modes; context length 1M; max output 384K; features include JSON output, tool calls, Responses API, Anthropic API, chat prefix completion (beta), FIM completion (beta) and vision. Pricing per 1M tokens in USD: cache-hit input off-peak $0.003 and peak $0.006; cache-miss input off-peak $0.15 and peak $0.3; output off-peak $0.6 and peak $1.2; concurrency limit 2500. Notes state that deepseek-flash is the model name, off-peak rates are half of peak rates, peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday through Friday excluding Chinese public holidays, and the legacy name deepseek-v4-flash is still accepted but its model has been retired and is served by DeepSeek-V4.1-Flash-1017 at the Flash price.

条件：Set on 2026-10-20 because the pricing page lists deepseek-flash as the current model name and the release note documents the 2026-10-17 version as the model now served by the API; the earlier DeepSeek-V4-Flash-0731 version is retired and its legacy alias is served by this version.

证据：Model details for deepseek-flash: model version DeepSeek-V4.1-Flash-1017; supports both non-thinking and thinking modes; context length 1M; max output 384K; features include JSON output, tool calls, Responses API, Anthropic API, chat prefix completion (beta), FIM completion (beta) and vision. Pricing per 1M tokens in USD: cache-hit input off-peak $0.003 and peak $0.006; cache-miss input off-peak $0.15 and peak $0.3; output off-peak $0.6 and peak $1.2; concurrency limit 2500. Notes state that deepseek-flash is the model name, off-peak rates are half of peak rates, peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday through Friday excluding Chinese public holidays, and the legacy name deepseek-v4-flash is still accepted but its model has been retired and is served by DeepSeek-V4.1-Flash-1017 at the Flash price.

条件：Recorded on 2026-10-20 from the pricing page model details: max output 384K.

证据：Model details for deepseek-flash: model version DeepSeek-V4.1-Flash-1017; supports both non-thinking and thinking modes; context length 1M; max output 384K; features include JSON output, tool calls, Responses API, Anthropic API, chat prefix completion (beta), FIM completion (beta) and vision. Pricing per 1M tokens in USD: cache-hit input off-peak $0.003 and peak $0.006; cache-miss input off-peak $0.15 and peak $0.3; output off-peak $0.6 and peak $1.2; concurrency limit 2500. Notes state that deepseek-flash is the model name, off-peak rates are half of peak rates, peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday through Friday excluding Chinese public holidays, and the legacy name deepseek-v4-flash is still accepted but its model has been retired and is served by DeepSeek-V4.1-Flash-1017 at the Flash price.

条件：Recorded on 2026-10-20 as the peak output rate; off-peak is half of peak ($0.60). The page lists cache-hit input separately at $0.006 peak and $0.003 off-peak per 1M tokens.

证据：Model details for deepseek-flash: model version DeepSeek-V4.1-Flash-1017; supports both non-thinking and thinking modes; context length 1M; max output 384K; features include JSON output, tool calls, Responses API, Anthropic API, chat prefix completion (beta), FIM completion (beta) and vision. Pricing per 1M tokens in USD: cache-hit input off-peak $0.003 and peak $0.006; cache-miss input off-peak $0.15 and peak $0.3; output off-peak $0.6 and peak $1.2; concurrency limit 2500. Notes state that deepseek-flash is the model name, off-peak rates are half of peak rates, peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday through Friday excluding Chinese public holidays, and the legacy name deepseek-v4-flash is still accepted but its model has been retired and is served by DeepSeek-V4.1-Flash-1017 at the Flash price.

条件：Set on 2026-10-20 from the official release note index entry 'DeepSeek-V4.1-Flash-1017 Release 2026/10/17'.

证据：The news index lists 'DeepSeek-V4.1-Flash-1017 Release 2026/10/17' and the release note introduces DeepSeek-V4.1-Flash-1017 as the current DeepSeek Flash model served through the DeepSeek API.