Introducing GPT 5.1: Next-level intelligence from OpenAI
GPT 5.1’s release comes with major updates and improvements over its predecessor in terms of model reasoning, communication and scaling.
Trusted by users from 10,000+ companies
What Makes GPT-5.1 a Standout
GPT-5.1 is a thoughtfully reengineered model that blends speed, depth, and personality in new ways.
Adaptive Reasoning Efficiency
GPT-5.1 dynamically adjusts how much “thinking” it does based on task complexity. For simple tasks, it uses fewer reasoning tokens and delivers faster, while for harder problems, it takes more time to reason thoroughly.
Extended Context Window & Prompt Caching
With prompt caching of up to 24 hours, GPT-5.1 retains conversation or workflow context more efficiently, reducing both latency and token cost.
Sharper Benchmark Performance
On coding benchmarks like SWE-bench Verified, GPT-5.1 achieves 76.3% accuracy, outperforming GPT-5’s 72.8%. It also introduces tools like “apply_patch” for structured code editing and a “shell” tool for command-line interactions.
Advanced Thinking Tailored to Your Need
You can use GPT‑5.1 to break down complex problems into logical, easy‑to-follow steps — even when you're under pressure. It adjusts how deeply it reasons, giving you thoughtful insight exactly when you need it most.
Why GPT‑5.1 Is a Must‑Use Upgrade
GPT‑5.1 is a deeply versatile and efficient model for almost any user.
Dual-Mode Reasoning
GPT-5.1 offers two separate modes. “Instant” for fast replies and “Thinking” for deeper, more deliberate responses.
Adaptive Computation Scaling
It dynamically adjusts how much “thinking” it does based on the complexity of the task.
No‑Reasoning Option
A “no reasoning” mode lets you skip deep thought entirely for latency‑sensitive, simple queries.
Longer Prompt Caching
Retains context in the prompt cache for up to 24 hours, reducing cost and speeding up follow-up interactions.
Improved Code Editing Tools
Includes an “apply_patch” tool that reliably edits codebases by generating structured patch operations.
Massive Context Window
Supports a very large openai gpt‑5.1 context window tokens limit (up to ~196 K tokens in Thinking mode), enabling deeper, longer‑form interactions.
Richer Personality Presets
Lets you choose from multiple new tone styles (Friendly, Professional, Quirky, Cynical, etc.) to match how you want to communicate.
Fine‑Tunable Tone Controls
Adjust warmth, conciseness, and emoji usage to personalize how the model responds to you.
Better Instruction Adherence
More reliably follows user instructions, reducing off-topic detours and improving clarity.
Frequently Asked Questions
Read what other people have ben asking about GPT 5.1 and it's abilities.