2026
2 events2025
13 eventsTimeline
OpenAI
Model★ LandmarkGPT-5.5
OpenAI's smartest and most intuitive model yet, framed as a step toward an AI super app.
- Model
GPT-5.3-Codex
Most capable agentic coding model to date, 25% faster while advancing reasoning.
- Model
GPT-5.2
Most capable model for professional knowledge work, topping GDPval across 44 occupations.
- Model
GPT-5.1
A smarter, more conversational GPT-5 update with adaptive reasoning that adjusts thinking time.
- Product
DevDay 2025: AgentKit & Apps SDK
Shipped AgentKit, an Apps SDK on MCP, and GPT-5 Pro to make ChatGPT an agent-building platform.
- Model★ Landmark
Sora 2
A more physically accurate video model with synchronized audio, launched with a social app.
- Model★ Landmark
GPT-5
Unified flagship with a real-time router between fast and deep-reasoning models for all users.
- Open weights★ Landmark
gpt-oss-120b and gpt-oss-20b
OpenAI's first open-weight models since GPT-2, Apache 2.0 and near o4-mini reasoning quality.
- Product
ChatGPT agent
Unified agent combining Operator, deep research, and ChatGPT on its own virtual computer.
- Model★ Landmark
o3 and o4-mini
Frontier reasoning models that agentically use every ChatGPT tool, setting new math/coding records.
- Model
GPT-4.1 family
API models with 1M-token context and major coding and instruction-following gains over GPT-4o.
- Funding★ Landmark
$40B round at $300B valuation
The largest private tech fundraise on record, led by SoftBank, doubling OpenAI's valuation.
- Product
Deep research
Agentic ChatGPT feature that synthesizes hundreds of web sources into analyst-grade reports.
- Product
Operator
OpenAI's first computer-using agent that browses the web to complete tasks autonomously.