GPT-5.3-Codex review, price and benchmarks (2026)

public paid api in Generator coding agents

Provider

Statuspublic

AA Intelligence Index44.3 (July 16, 2026 snapshot)

Releasedn/a

Context windown/a

Modalitiesn/a

API price $/1M (in / out)n/a

Speedn/a

AccessAPI · Codex tooling

In one line

Coding specialist built for agentic dev workflows rather than chat - punches far above its overall index score inside a code editor.

Coding85

Reasoning72

Writing55

Agents & tools84

Category scores (0-100) are WhichAI blended ratings: public category leaderboards plus editorial judgment. Guidance, not official measurements.

Alternatives worth a look

DeepSeek V4 Pro (DeepSeek) · AA 44.3Free chat app · open weights · very cheap API · 1M context default
Kimi K2.6 (Moonshot AI) · AA 44.2Open weights · API hosts · free chat app
MiniMax M3 (MiniMax) · AA 44.4Open weights · API hosts

Open GPT-5.3-Codex's official app ↗ Open in the WhichAI app Not sure? Take the 30-second finder

Artificial Analysis Intelligence Index, 2026 rebased scale (top models ≈ 55–60). Snapshot: July 24, 2026 (BenchLM mirror), retrieved July 26, 2026. Context, price and release data come from vendor pages and public pricing mirrors (retrieved July 19, 2026). Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (Model guide and About > Methodology).