Base44 Superagents-AI agent that does it all
Mini toolsGPT 5.1 Codex High
By OpenAI
Model family: GPT
Codex High increases its internal deliberation for tricky work like framework upgrades, cross-service changes, and performance-sensitive fixes. It verifies intermediate steps, explains choices, and returns deterministic structured outputs that are easy to audit. The model still streams tokens for interactive editing, but prioritizes correctness over raw latency. Teams typically route routine edits to GPT 5.1 Codex for throughput, then reserve Codex High for high-stakes changes, large refactors, and compliance-bound code paths.
New
Coding
Gen 2
Overview
GPT 5.1 Codex High trades a bit of speed for higher accuracy on complex coding tasks. It performs deeper reasoning, stronger spec adherence, and safer edits with the same long context and tool calling surface.
About OpenAI
OpenAI is a technology company that specializes in artificial intelligence research and innovation.
Industry:
Artificial Intelligence
Company Size:
5000-5500
Location:
San Francisco, California, US
Website:
openai.com
Tools using GPT 5.1 Codex High
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Cursor — v2Much stronger coding performance, with big benchmark gains over Composer 1.5 across CursorBench, Terminal-Bench 2.0, and SWE-bench Multilingual. Better long-horizon task solving, aimed at coding jobs that require hundreds of actions instead of shorter edit loops. Stronger base model training from Cursor’s first continued pretraining run, giving reinforcement learning a better foundation than before. Better price-to-intelligence balance, positioned as a much stronger model without giving up cost efficiency. Adds a faster same-intelligence variant and makes fast mode the default option.
Last updated: February 25, 2026
