gpt-5.1-codex by Jiekou.AI — Specs, Pricing & Capabilities | whichllm

Model ID gpt-5.1-codex

Provider Jiekou.AI

Family gpt-codex

Status -

Knowledge Cutoff -

Release Date 2026-01

Input Modalities text, image

Output Modalities text

Context Window 400000

Input Limit -

Output Limit 128000

Tool Calling Yes

Reasoning Yes

Structured Output Yes

Temperature Control Yes

Open Weights No

Input Cost / 1M tokens $1.12

Output Cost / 1M tokens $9.00

Reasoning Cost / 1M tokens -

Cache Read Cost / 1M tokens -

Cache Write Cost / 1M tokens -