GPT-5.2 Codex vs GPT-5.3 Codex: Specs & Benchmark Comparison
| Characteristic | GPT-5.2 Codex | GPT-5.3 Codex |
|---|---|---|
| Company | OpenAI | OpenAI |
| Release Date | January 13, 2026 | February 5, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 400K | 400K |
| Context (output) | 128K | 128K |
| Input Price / 1M | $1.75 | $1.75 |
| Output Price / 1M | $14.00 | $14.00 |
| Average Score | 0.6 | 0.7 |
| Benchmarks | ||
| Terminal-Bench 2.0 | 0.6 | 0.8 |
| SWE-Bench Pro | 0.6 | 0.6 |
Visual Benchmark Comparison
GPT-5.2 Codex
GPT-5.3 Codex
Terminal-Bench 2.00.6 vs 0.8
0.6
0.8
SWE-Bench Pro0.6 vs 0.6
0.6
0.6
Verdict
GPT-5.3 Codex leads in 1 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.2 Codex — 0.6, GPT-5.3 Codex — 0.7.
API Cost
API cost is identical: input $1.75/1M, output $14.00/1M tokens.
Context Window
Same context size: 400K tokens.
Recency
GPT-5.3 Codex is newer: released 2/5/2026 vs 1/13/2026.
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Related Comparisons
The GPT-5.2 Codex and GPT-5.3 Codex comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-5.2 Codex or GPT-5.3 Codex page. See also the complete list of AI model comparisons.