Claims and evidence
- Released Date of the API release (deepseek-chat upgraded to DeepSeek-V2-0628). The weights appeared on Hugging Face later; the model card states no date. Primary source[2]Date: 2024-06-28
- Status AvailableWeights are still public and ungated on Hugging Face. In the DeepSeek API, deepseek-chat moved to DeepSeek-V2.5 on 2024-09-05. Primary source[1] [2]Date: 2024-09-05
- Replaced by DeepSeek-V2.5In the DeepSeek API only: deepseek-chat and deepseek-coder were upgraded to DeepSeek-V2.5. The weights stay available. Primary source[2]Date: 2024-09-05
- Revision of DeepSeek-V2The model card calls it an improved version of DeepSeek-V2-Chat. According to the V2.5 announcement, DeepSeek replaced the base model of DeepSeek-V2-Chat with the Coder-V2 base for this update. Primary source[1]1. Introduction [2]Date: 2024-06-28 [3]Version History
- Change · Training data Built on the Coder-V2 base model instead of the DeepSeek-V2 base; DeepSeek says the switch was meant to improve code generation and reasoning.Compared with DeepSeek-V2 Primary source[3]Version History
- Change · Other Instruction following in the system prompt improved, which the model card says helps tasks such as immersive translation and retrieval-augmented generation.Compared with DeepSeek-V2 Primary source[1]1. Introduction
- Change · Other DeepSeek reports stronger role-playing, with the model able to act as different characters on request.Compared with DeepSeek-V2 Primary source[2]Date: 2024-06-28
- Change · Reasoning DeepSeek reports better reasoning, coding and maths results than DeepSeek-V2-Chat.Compared with DeepSeek-V2 Primary source[2]Date: 2024-06-28
Lineage
Predecessors
No known predecessor.
Successors
No known successor.
Based on
- DeepSeek-V2 · 6 May 2024 · revision
Variants and derived
- DeepSeek-V2.5 · 5 September 2024 · derived (merge)
Siblings
- DeepSeek-V2 (base model) · inline variant of DeepSeek-V2
- DeepSeek-V2-Chat · inline variant of DeepSeek-V2
- DeepSeek-V2-Lite · inline variant of DeepSeek-V2
- DeepSeek-V2-Lite-Chat · inline variant of DeepSeek-V2
All ancestors
- DeepSeek LLM · 29 November 2023
- DeepSeek-V2 · 6 May 2024
All descendants
- DeepSeek-V2.5 · 5 September 2024
- DeepSeek-V2.5-1210 · 10 December 2024
- DeepSeek-V3 · 26 December 2024
- DeepSeek-R1 · 20 January 2025
- DeepSeek-R1-Zero · 20 January 2025
- Sonar Reasoning Pro · Perplexity · February 2025?
- R1 1776 · Perplexity · 18 February 2025
- DeepSeek-V3-0324 · 24 March 2025
- MAI-DS-R1 · Microsoft · 17 April 2025
- Phi-4-mini-reasoning · Microsoft · 30 April 2025
- DeepSeek-R1-0528 · 28 May 2025
- Phi-4-mini-flash-reasoning · Microsoft · 9 July 2025
- DeepSeek-V3.1 · 21 August 2025
- DeepSeek-V3.1-Terminus · 22 September 2025
- DeepSeek-V3.2-Exp · 29 September 2025
- DeepSeek-V3.2 · 1 December 2025
- DeepSeek-V3.2-Speciale · 1 December 2025
- DeepSeek-V4-Flash · 24 April 2026
- DeepSeek-V4-Pro · 24 April 2026
- DeepSeek-V4-Flash-0731 · 31 July 2026
- DeepSeek-V4-Pro-0813 · 13 August 2026
- DeepSeek-V4-Flash-Vision-Exp · 21 August 2026
- DeepSeek-V4.1-Flash · 10 September 2026
Variants
No variants recorded in this record.
Related AI Radar coverage
AI Radar coverage starts in June 2026; no coverage linked yet.