Trend
Why Hasn't DeepSeek R2 Shipped? The Stakes Behind the Wait
R2 has been rumored and denied repeatedly since DeepSeek-R1 shook the industry. Reports say CEO Liang Wenfeng's high bar is the main reason for the delay.
DeepSeekReasoning Models
Launch
OpenAI Returns to Open Source After Six Years: gpt-oss Ships Under Apache 2.0
OpenAI released the gpt-oss-120b and 20b open-weight reasoning models on August 5, 2025 — its first open weights since GPT-2.
OpenAIOpen SourceReasoning Models
Research
OpenAI o1 Launches: 'Think Before Answering' Opens a New Reasoning-Model Paradigm
On September 12, 2024, OpenAI released o1 (codenamed Strawberry), the first model trained via RL to think at length before answering — redefining reasoning.
OpenAIReasoning Models