GPT-5.2 Codex vs Grok-3 Mini: Specs & Benchmark Comparison
| Characteristic | GPT-5.2 Codex | Grok-3 Mini |
|---|---|---|
| Company | OpenAI | xAI |
| Release Date | January 13, 2026 | February 16, 2025 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 400K | 128K |
| Context (output) | 128K | 8K |
| Input Price / 1M | $1.75 | $0.30 |
| Output Price / 1M | $14.00 | $0.50 |
| Average Score | 0.6 | 0.9 |
Verdict
GPT-5.2 Codex leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.2 Codex — 0.6, Grok-3 Mini — 0.9.
API Cost
Grok-3 Mini is 19.7x cheaper: input $0.30/1M vs $1.75/1M tokens.
Context Window
GPT-5.2 Codex supports a larger context: 400K vs 128K tokens.
Recency
GPT-5.2 Codex is newer: released 1/13/2026 vs 2/16/2025.
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The GPT-5.2 Codex and Grok-3 Mini 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 Grok-3 Mini page. See also the complete list of AI model comparisons.