OpenAI: GPT-5.3-Codex
OpenAI: GPT-5.3-Codex ranks #18 of 96 models by Artificial Analysis quality score (32.5) at $4.81/1M tokens blended - and ranks #155 of 404 by average real OpenRouter usage share over the trailing 125-day window (0.00%).
- Quality (Intelligence Index) - 32.5
- Coding index - -
- Agentic index - -
- Price (blended $/1M) - 4.81
- Context window - 400,000
- Usage rank - #155 of 404
- Providers - 0
- Open/closed - closed
Frequently asked questions
What is OpenAI: GPT-5.3-Codex's quality score?
OpenAI: GPT-5.3-Codex scores 32.5 on Artificial Analysis's Intelligence Index, ranking #18 of 96 models with a published score.
How much does OpenAI: GPT-5.3-Codex cost?
OpenAI: GPT-5.3-Codex costs $4.81 per 1M tokens (blended 75% prompt / 25% completion pricing).
Is OpenAI: GPT-5.3-Codex widely used?
OpenAI: GPT-5.3-Codex ranks #155 of 404 models by average real OpenRouter usage share, averaging 0.00% of classified token volume over the trailing 125-day window.
Is OpenAI: GPT-5.3-Codex open-weight or closed?
OpenAI: GPT-5.3-Codex is a closed-weight model.
Source: OpenRouter (openrouter.ai/rankings), as of November 7, 2026.
Benchmark scores: Artificial Analysis (artificialanalysis.ai) via OpenRouter (openrouter.ai/rankings).
Methodology: www.smophy.ai/benchmark/methodology
Token counts originate from each provider's own tokenizer and are not directly comparable across providers.