DeepSeek V4.1 Flash Fast

DeepSeek-V4.1-Flash-Fast sits within the deepseek-flash family developed by DeepSeek, an organization recognized for releasing models with openly distributed weights that practitioners can self-host or access through various inference providers. The family targets efficient inference while preserving multimodal understanding, accepting both text and image inputs and producing text outputs suitable for chat assistants, document analysis, and structured data extraction. Its position within the flash family lineage suggests a design philosophy centered on balancing capability with deployment economy, making it attractive for teams building reasoning-heavy applications without the computational footprint of larger frontier models.

From a practical standpoint, the model supports tool calling, explicit reasoning, and structured output generation, enabling it to plug into agent pipelines that must interleave planning steps with external function calls and schema-constrained responses. The open-weight availability invites fine-tuning and domain adaptation, which is particularly valuable for organizations with specialized vocabularies or latency-sensitive workloads. While detailed benchmark numbers and architecture specifics from DeepSeek's own technical reports are not present in the available evidence, the combination of broad modality coverage, reasoning support, and ecosystem flexibility positions this variant as a versatile middle-ground option for developers who want multimodal understanding and tool integration without committing to the largest models in DeepSeek's catalog.

Basetendeepseek-ai/DeepSeek-V4.1-Flash-Fastdeepseek-flash

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Quick Info

Provider: Baseten
Model key: deepseek-ai/DeepSeek-V4.1-Flash-Fast
Release date: Sep 10, 2026
Last updated: Sep 10, 2026
Knowledge cutoff: 2025-05
Input modalities
Output modalities
Capabilities

Cost

Input token cost: $0.60
Output token cost: $2.40

Limits

Output tokens: 32,768 tokens
Context window: 1,048,576 tokens

Transparent token rates

Compare DeepSeek V4.1 Flash Fast pricing

Rates are shown per one million tokens. Combined means one million input plus one million output tokens.

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Latest news about DeepSeek V4.1 Flash Fast

Baseten

Coverage

Command Code announced on September 28, 2026 that DeepSeek V4.1 Flash Fast is live in its GOAT plan, with $60 in usage credits and cited throughput of 250-300 tokens per second alongside a 1M-token context window. The post is a third-party downstream integration notice rather than a first-party DeepSeek release, and the TPS figure is a partner-reported marketing claim without benchmark methodology. Because this is a gateway/host availability announcement with no technical detail about the model itself, it functions only as confirmation that the DeepSeek V4.1 Flash Fast variant exists and is being served to Command Code users. No benchmarks, architecture, or creator-sourced specifications are supplied, so the candidate is accepted as a thin existence-and-availability data point rather than substantive model news.

Baseten

CoverageBenchmark

Artificials lists DeepSeek V4.1 Flash Fast as a DeepSeek-made reasoning model with a September 10, 2026 release, a May 2025 knowledge cutoff, a 1M-token context window, 32.8K-token max output, open downloadable weights, multimodal image-and-text input, and four reasoning effort levels (none, low, high, max). Pricing spans $0.30-$0.60 per 1M input tokens and $1.20-$2.40 per 1M output, with Baseten as the highest-priced host and cached input free to read. The page does not yet include published benchmark scores, so capability rankings are unscored, and provenance is aggregator-level rather than first-party DeepSeek. It is useful as a concrete specification and pricing snapshot for the exact V4.1 Flash Fast variant, including the fact that Baseten's per-token rate exceeds the median across listed hosts.

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