OpenAI Codex MinivsGemini 2.5 Flash Preview
Gemini 2.5 Flash Preview is cheaper than OpenAI Codex Mini at $0.15/M vs $1.5/M input tokens.
| Spec | OpenAI Codex Mini | Gemini 2.5 Flash Preview |
|---|---|---|
| Input price | $1.5/M tokens | $0.15/M tokens |
| Output price | $6/M tokens | $0.6/M tokens |
| Context window | 200K tokens | 1.0M tokens |
| Parameters | Not disclosed | Not disclosed |
| Free API (OpenRouter) | No | No |
| Released | May 2025 | Apr 2025 |
| SWE-bench Verified | 71.3% | 60.4% |
Our Verdict
OpenAI Codex Mini
Gemini 2.5 Flash Preview
Not enough votes to call it. On the specs, nothing separates them.
Gemini 2.5 Flash Preview costs 10x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
OpenAI Codex Mini
Input
$1.50
Output
$6.00
Gemini 2.5 Flash Preview
Input
$0.15
10× cheaper
Output
$0.60
10× cheaper
Gemini 2.5 Flash Preview is cheaper on both: 10× input, 10× output.
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