ZenMuxGPT-5.1-Codex model ID, context window & pricing
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Quick facts
Model ID openai/gpt-5.1-codex
Source ZenMux
Context Window 400000
Pricing $1.25 input / $10.00 output per 1M tokens
Capabilities tool calling, reasoning, temperature control
Model overview
GPT-5.1-Codex is an AI model from ZenMux with 400000 token context window and text, image input support.
Published pricing is $1.25 input and $10.00 output per 1M tokens.
- Workloads that use text, image inputs with text outputs.
- Agent and tool workflows that need function calling.
- Reasoning-heavy prompts where stepwise problem solving matters.
Model ID openai/gpt-5.1-codex
Provider ZenMux
Family -
Status -
Knowledge Cutoff 2025-01-01
Release Date 2025-11-13
Input Modalities text, image
Output Modalities text
Context Window 400000
Input Limit -
Output Limit 64000
Tool Calling Yes
Reasoning Yes
Structured Output -
Temperature Control Yes
Open Weights No
Input Cost / 1M tokens $1.25
Output Cost / 1M tokens $10.00
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens $0.12
Cache Write Cost / 1M tokens -