GPT-5.3-Codex vs GPT-5.4
GPT-5.4 leads in 3 of 8 categories
Arena ELO
GPT-5.4
Cheaper
GPT-5.3-Codex
Faster
GPT-5.4
Detailed Comparison
| Category | GPT-5.3-Codex | GPT-5.4 |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Context Window | 128K | 1M WIN |
| Input Price ($/1M) | $1.75 WIN | $3 |
| Output Price ($/1M) | $14 WIN | $15 |
| Arena ELO | N/A | 1560 WIN |
| Coding | N/A | unknown |
| Reasoning | N/A | unknown |
| Speed (tokens/sec) | N/A | ~50 t/s WIN |
| Open Source | No | No |
Frequently Asked Questions
Which is cheaper, GPT-5.3-Codex or GPT-5.4?
GPT-5.3-Codex is approximately 13% cheaper than GPT-5.4 per million tokens.
Which is better for coding, GPT-5.3-Codex or GPT-5.4?
GPT-5.3-Codex scores N/A on coding benchmarks, while GPT-5.4 scores unknown.
Which has a larger context window?
GPT-5.3-Codex supports 128K context, while GPT-5.4 supports 1M.
Is GPT-5.3-Codex or GPT-5.4 open source?
GPT-5.3-Codex is proprietary. GPT-5.4 is proprietary.
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