Introducing GPT-5.1 for developers
What changed
GPT-5.1 is now available in the API, bringing faster adaptive reasoning, extended prompt caching, improved coding performance, and new apply_patch and shell tools.
Why it matters
A concrete addition to Practical AI: Tools, Models & Frameworks: it changes what's available to builders today rather than being general commentary.
How it compares
Related prior coverage to compare against:
- Introducing GPT-5 for developers
- Introducing GPT-5.5
- Introducing gpt-oss-safeguard
Sources
- Introducing GPT-5.1 for developers (openai-blog)primary