DeepSeek V4.1 Flash identifies itself as ChatGPT, fueling distillation claims

Tests by user scaling01 show DeepSeek V4.1 Flash repeatedly identifies itself as ChatGPT, even after removing OpenRouter's default system prompt, fueling speculation that the model is distilled from or a rebrand of an OpenAI model.

2026-10-18 ~ 2026-10-18 · 3 related posts

• DeepSeek V4.1 Flash claims to be ChatGPT in identity checks, screenshot shows — scaling01 · 2026-10-18
• New model repeatedly identifies itself as ChatGPT in hands-on test — scaling01 · 2026-10-18
• Model repeatedly claims to be ChatGPT once OpenRouter default system prompt removed — scaling01 · 2026-10-18