GPT-5.3-Codex
OpenAI · Mid
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
Input / 1M
$1.75
Output / 1M
$14.00
Cached input / 1M
$0.175
Context window
400K
Where it sits
242nd-cheapest mid model
by blended $/Mtok among 262 listed mid models
742% above the mid median
blended $/Mtok across 262 mid models
Output costs 8× input
$1.75 in / $14.00 out per 1M
Cached input saves 90%
$0.175 vs $1.75 per 1M fresh
Held flat since launch (Jun 2026)
no blended price change recorded
Computed live from current prices and this model's history — not hand-written, so it stays accurate as prices move.
Price history
Only one price on record so far — the history chart appears once a price changes.
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 11 Jun 2026 | $1.75 | $14.00 | $0.175 | Imported from OpenRouter | openrouter.ai |