DeepSeek released V4.1-Flash
DeepSeek has released V4.1-Flash, a multimodal model containing 552 billion total parameters with 16 billion active parameters per token. According to benchmark results reported from DeepSeek, V4.1-Flash narrowly outperforms Opus 5 and GPT-5.6 Sol on the DeepSWE coding benchmark and is published under an open MIT license. Claims are as reported; this summary makes no determination about accuracy or significance.
- First detected
- Sep 10, 2026
- Last updated
- Sep 11, 2026
High confidence
Independently reported by multiple publishers.
Corroborated
Corroborated across 2 independent sources
What does this mean?
Corroboration measures how many genuinely independent sources support the event. Confidence measures how reliable the available evidence appears.
No material changes recently.
Stable
No recent reporting has materially changed the known facts.
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Why it matters
Substantial reductions in KV cache memory and sparse parameter activation decrease the hardware infrastructure required for memory-intensive AI agent workflows. Distributing a model with competitive benchmark performance under an open MIT license provides an alternative to proprietary APIs, reducing deployment costs for software engineering and autonomous agent systems.
Coverage
Independent reporting2 sources
Primary/vendor sources vs independent reporting
Primary / vendor source: information published directly by the company, organization, government body or project involved. Useful as a primary source, but not independent confirmation.
Independent reporting: reporting or analysis from a source independent of the organization making the underlying claim.
Timeline
Sep 26, 2026
Development status changed
Developing → Stable — new reporting is no longer substantially changing the known facts
Sep 11, 2026
Corroboration updated
The set of supporting sources changed.
Development status changed
New → Developing — new reporting is still materially changing this development
Sep 10, 2026
New reporting added
DeepSeek releases V4.1-Flash, says it outperforms flagship V4-ProSiliconANGLEIndependent reporting
Development detected
New reporting added
New Deepseek model V4.1-Flash cuts memory needs for AI agentsThe DecoderIndependent reporting
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