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Provider Docs
GPT-5.3 Codex
ZenMux · openai/gpt-5.3-codex
Capabilities
Tool CallYes
ReasoningYes
Structured OutputNo
Temperature ControlYes
AttachmentsYes
Open WeightsNo
Modalities
Input
text
Output
text
Pricing (per 1M tokens)
Input$1.75
Output$14.00
Direct installation coming soon — March 2026
Details
ProviderZenMux
Model IDopenai/gpt-5.3-codex
Knowledge Cutoff2025-08-31
Release Date2026-03-20
Last Updated2026-03-20
Limits
Context400K
Max Output128K
SDK
@ai-sdk/openai-compatible