HeliconeOpenAI: GPT-5 Codex model ID, context window & pricing
gpt-codex
Quick facts
Model ID gpt-5-codex
Source Helicone
Context Window 400000
Pricing $1.25 input / $10.00 output per 1M tokens
Capabilities tool calling
Model overview
OpenAI: GPT-5 Codex is an AI model from Helicone with 400000 token context window and text input support.
Published pricing is $1.25 input and $10.00 output per 1M tokens.
- Workloads that use text inputs with text outputs.
- Agent and tool workflows that need function calling.
Model ID gpt-5-codex
Provider Helicone
Family gpt-codex
Status -
Knowledge Cutoff 2025-01
Release Date 2025-01-01
Input Modalities text
Output Modalities text
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 $1.25
Output Cost / 1M tokens $10.00
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens $0.13
Cache Write Cost / 1M tokens -