OpenAI: GPT-5.1 Codex Mini by Helicone — Specs, Pricing & Capabilities | whichllm

Model ID gpt-5.1-codex-mini

Provider Helicone

Family gpt-codex

Status -

Knowledge Cutoff 2025-01

Release Date 2025-01-01

Input Modalities text, image

Output Modalities text, image

Context Window 400000

Input Limit -

Output Limit 128000

Tool Calling Yes

Reasoning No

Structured Output -

Temperature Control No

Open Weights No

Input Cost / 1M tokens $0.25

Output Cost / 1M tokens $2.00

Reasoning Cost / 1M tokens -

Cache Read Cost / 1M tokens $0.02

Cache Write Cost / 1M tokens -