GPT-5.3-Codex API Pricing
Short answer
GPT-5.3-Codex costs $1.75 per 1M input tokens and $14.00 per 1M output tokens . Context window: 400,000. Last verified 2026-06-17 from openrouter.ai. Confidence: Verified.
GPT-5.3-Codex is OpenAI's most advanced agentic coding model, tuned for software engineering and mid-task steerability.
Input
$1.75 /1M
Output
$14.00 /1M
Cached input
— /1M
Input pricing$1.75
Output pricing$14.00
Limits & capabilities
Context window400,000
Max output128K
Modalitytext + image input, text output
ChannelOpenRouter
ProviderOpenAI
Best for
Agentic codingSoftware engineeringTool use
Context 400K (272K input / 128K output). Released 2026-02-24.
Last checked Verified
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