Sources & verification notes

DeepSeek V4.1 Flash

• Exact identifier & access

  Identity and lifecycle apply to this exact identifier and serving surface.

  • deepseek-ai/DeepSeek-V4.1-Flash model card ↗DeepSeek · provider-authored · checked Oct 1, 2026

• First availability

  Effective Sep 10, 2026. Checked Oct 1, 2026.

  • DeepSeek-V4.1-Flash Release ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Availability status

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  The repository is listed in the deepseek-ai Hugging Face organization and downloadable as of 2026-10-01.

  • deepseek-ai/DeepSeek-V4.1-Flash model card ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Capabilities & limits

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  The card says the model supports contexts of up to one million tokens. The card recommends max_tokens of at least 256K but states no maximum. The card's encoding folder covers tool calling. The card documents no JSON or structured-output mode. Image input per the card.

  • deepseek-ai/DeepSeek-V4.1-Flash model card ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Input price

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  Downloadable weights; no managed API price applies.

  • deepseek-ai/DeepSeek-V4.1-Flash model card ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Output price

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  Downloadable weights; no managed API price applies.

  • deepseek-ai/DeepSeek-V4.1-Flash model card ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Reference price

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  The developer's own API price for deepseek-flash, which serves this model (https://api-docs.deepseek.com/quick_start/pricing). Models & Pricing lists MODEL VERSION DeepSeek-V4.1-Flash for the model name deepseek-flash.

  • DeepSeek API pricing for deepseek-flash ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Model card

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  • deepseek-ai/DeepSeek-V4.1-Flash model card ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Official announcement

  Effective Sep 10, 2026. Checked Oct 1, 2026.

  • DeepSeek-V4.1-Flash Release ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Provider description

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  • deepseek-ai/DeepSeek-V4.1-Flash model card ↗DeepSeek · provider-authored · checked Oct 1, 2026

• Provider comparison

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  • DeepSeek-V4.1-Flash Release ↗DeepSeek · provider-authored · checked Oct 1, 2026

• License

  Effective date not established; this is an observation. Checked Oct 1, 2026.

  • deepseek-ai/DeepSeek-V4.1-Flash model card ↗DeepSeek · provider-authored · checked Oct 1, 2026