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OpenAI: GPT-5.1 Codex
gpt-codex
Helicone ·
gpt-5.1-codex
Capabilities
Tool Call
Yes
Reasoning
Yes
Structured Output
No
Temperature Control
No
Attachments
Yes
Open Weights
No
Modalities
Input
text
image
Output
text
Pricing (per 1M tokens)
Input
$1.25
Output
$10.00
Cache Read
$0.13
Install
Direct installation coming soon — March 2026
Provider Docs
Details
Provider
Helicone
Model ID
gpt-5.1-codex
Family
gpt-codex
Knowledge Cutoff
2025-01
Release Date
2025-11-13
Last Updated
2025-11-13
Limits
Context
400K
Max Input
272K
Max Output
128K
SDK
@ai-sdk/openai-compatible
OpenAI: GPT-5.1 Codex — Harmony Marketplace