OpenAI: GPT-5.1-Codex-Mini vs MoonshotAI: Kimi K2 Thinking
openai vs moonshotai
On price, OpenAI: GPT-5.1-Codex-Mini is cheaper (blended cost is about 0.64× that of MoonshotAI: Kimi K2 Thinking).
On capability, MoonshotAI: Kimi K2 Thinking has the higher intelligence index (22) — better for complex reasoning.
Verdict: pick OpenAI: GPT-5.1-Codex-Mini on a budget, or MoonshotAI: Kimi K2 Thinking for output quality. Full details below.
Side-by-Side Specs
| Metric | OpenAI: GPT-5.1-Codex-Mini | MoonshotAI: Kimi K2 Thinking |
|---|---|---|
| Input /1M | $0.25 | $0.60 |
| Output /1M | $2.00 | $2.50 |
| Blended (3:1) | $0.69 | $1.07 |
| Context | 400K | 262K |
| Intelligence | 20 | 22 |
| Coding | 36 | 35 |
| Math | 92 | 95 |
| Speed | 174 tok/s | 119 tok/s |
| CPS Grade | A | A |
FAQ
Which is cheaper, OpenAI: GPT-5.1-Codex-Mini or MoonshotAI: Kimi K2 Thinking?
On price, OpenAI: GPT-5.1-Codex-Mini is cheaper (blended cost is about 0.64× that of MoonshotAI: Kimi K2 Thinking). OpenAI: GPT-5.1-Codex-Mini: $0.25 in / $2 out; MoonshotAI: Kimi K2 Thinking: $0.6 in / $2.5 out (per 1M tokens).
Which is smarter, OpenAI: GPT-5.1-Codex-Mini or MoonshotAI: Kimi K2 Thinking?
On capability, MoonshotAI: Kimi K2 Thinking has the higher intelligence index (22) — better for complex reasoning. Coding index: OpenAI: GPT-5.1-Codex-Mini 36 vs MoonshotAI: Kimi K2 Thinking 35.
Which one should I choose?
Verdict: pick OpenAI: GPT-5.1-Codex-Mini on a budget, or MoonshotAI: Kimi K2 Thinking for output quality. Full details below.