GPT-5.1 Codex

GPT-5.1 Codex is a version of GPT-5.1 optimized for agentic coding tasks in Codex or similar environments. It features higher reasoning capabilities and is available in the Responses API.

SWE-Bench Verified

73.7%

i
SWE-Lancer

66.3%

i
Terminal-Bench 2.0

52.8%

i

Pricing, uptime, and speed via OpenRouter — updated Jul 17, 2026, 04:19 AM.

Provider	Status	Input	Output	Limits	Uptime	Speed	Notes
Azure	available	$1.25/Mtok cache $0.13/Mtok	$10.00/Mtok	400K tokens context 128K tokens max output	—	—	cache $0.01/web search
OpenAI	available	$2.50/Mtok cache $0.25/Mtok	$20.00/Mtok	400K tokens context 128K tokens max output	—	—	cache $0.01/web search