Developer snapshot
Key specifications
Verified Aug 3, 2026
- Model identifier
- deepseek-reasoner[1]
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Official checkpoints
Use the exact provider model identifier shown below when selecting this model in an API or compatible SDK.[1]
DE
Model profile
DeepSeek Reasoner
Built by DeepSeek
Legacy model name pointing to thinking mode of deepseek-v4-flash; discontinued as of 2026-07-24.[1]
Directory statusRetired
Official model cardVisit source ↗