GPT-5.3-Codex vs MiMo V2
Both models are evenly matched
Arena ELO
Tie
Cheaper
GPT-5.3-Codex
Faster
MiMo V2
Detailed Comparison
| Category | GPT-5.3-Codex | MiMo V2 |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Context Window | 128K | 256K WIN |
| Input Price ($/1M) | $1.75 WIN | N/A |
| Output Price ($/1M) | $14 WIN | N/A |
| Arena ELO | N/A | N/A |
| Coding | N/A | unknown |
| Reasoning | N/A | unknown |
| Speed (tokens/sec) | N/A | ~70 t/s WIN |
| Open Source | No | Yes |
Frequently Asked Questions
Which is better for coding, GPT-5.3-Codex or MiMo V2?
GPT-5.3-Codex scores N/A on coding benchmarks, while MiMo V2 scores unknown.
Which has a larger context window?
GPT-5.3-Codex supports 128K context, while MiMo V2 supports 256K.
Is GPT-5.3-Codex or MiMo V2 open source?
GPT-5.3-Codex is proprietary. MiMo V2 is open source.
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