OpenAI o1
OpenAI's o1 reasoning model, released in preview.
2024
o1-mini
A cost-efficient reasoning model alongside o1.
o1 for developers
o1 comes to developers alongside Realtime API improvements and a new fine-tuning method.
2025
OpenAI o3-mini
A new small model in the reasoning line.
Deep research
An agent that synthesizes online information to complete multi-step research tasks.
Claude 3.7 Sonnet
First hybrid reasoning model: near-instant answers or visible extended thinking.
o3 and o4-mini
OpenAI's smartest and most capable models at release, with full tool access.
Claude 4 (Opus 4 and Sonnet 4)
Opus 4 and Sonnet 4 can use tools during extended thinking; Opus 4 is aimed at long agent tasks.
gpt-oss-120b and gpt-oss-20b
Two open-weight language models under Apache 2.0, optimized for deployment on consumer hardware.
GPT-5
OpenAI's new flagship model, with leading performance across coding, math, writing and health.
gpt-oss-safeguard
Open-weight reasoning models that classify content against a developer-provided safety policy.
GPT-5.1
Upgraded GPT-5 models in ChatGPT with new tone and style controls, rolling out to paid users.
GPT-5.1 in the API
GPT-5.1 reaches the API with adaptive reasoning, extended prompt caching, and apply_patch and shell tools.
GPT-5.2
Frontier model for professional work, improving reasoning, long context, coding and vision, in ChatGPT and API.
2026
GPT-5.3-Codex
A Codex-native agent model pairing frontier coding performance with general reasoning.
GPT-Rosalind
A reasoning model for life sciences: drug discovery, genomics analysis and protein reasoning.
GPT-6 Astra
OpenAI's most intelligent model yet, state of the art in computer use, coding, cybersecurity and science.
No events match these filters.