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MODEL / GPT-5-3-CODEX

GPT-5.3 Codex

GPT-5.3 coding-specialized.

model

textcode
Kindmodel
Access—
Pricing—
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Caps2

SPECS

context window400,000 tokens
max output128,000 tokens
price in / out$1.75 / $14 per 1M tokens
weightsclosed

openrouter.ai/api/v1/models (as of 2026-11-12)

PUBLISHED BENCHMARKS

aaIndex32.5

OpenAI published · 2025

MACHINE-READABLE

GET /api/v1/resources/gpt-5-3-codex
Open JSON ↗