Model comparison
GPT-5.2 Codex vs MiMo-V2.6-Pro
MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 42.2 on the Noometry Index.
Last verified . 1 shared benchmarks.
Summary
- They share 1 benchmark with published results for both. GPT-5.2 Codex scores higher in 0 categories and MiMo-V2.6-Pro in 1 category; one gap is clear of the uncertainty.
- The widest gap is in coding, where MiMo-V2.6-Pro leads 53.2 to 45.4.
- MiMo-V2.6-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $1.75 / $14 for GPT-5.2 Codex.
- MiMo-V2.6-Pro accepts more context: 1.05M tokens versus 400K.
- MiMo-V2.6-Pro has downloadable open weights; the other is API-only.
Side by side
| GPT-5.2 Codex | MiMo-V2.6-Pro | |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 42.2 | 46.7 |
| Released | 2025-12-18 | 2026-09-22 |
| Weights | Proprietary | Open |
| Context window | 400K | 1.05M |
| Max output | 128K | 131K |
| Input $ / M tokens | $1.75 | $0.43 |
| Output $ / M tokens | $14 | $0.87 |
| Results tracked | 5 | 14 |
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Category by category
Coding MiMo-V2.6-Pro leads
GPT-5.2 Codex: 45.4 (#66), MiMo-V2.6-Pro: 53.2 (#27)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena WebDev | 1339 | 1618 |
| SWE-bench Verified (bash only) | 72.8% | — |
| SWE-bench Multilingual | 66.3% | — |
| LMArena Coding | — | 1538 |
| ALE-Bench | 1,300 | — |
Agentic & Tool Use Not comparable
GPT-5.2 Codex: 40.7 (#20), MiMo-V2.6-Pro: —
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| Terminal-Bench | 66.5% | — |
Reasoning Not comparable
GPT-5.2 Codex: —, MiMo-V2.6-Pro: 30.4 (#76)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Hard Prompts | — | 1511 |
Math Not comparable
GPT-5.2 Codex: —, MiMo-V2.6-Pro: 37.9 (#91)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Math | — | 1497 |
Knowledge Not comparable
GPT-5.2 Codex: —, MiMo-V2.6-Pro: 43.0 (#85)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Expert | — | 1548 |
Multimodal Not comparable
GPT-5.2 Codex: —, MiMo-V2.6-Pro: 40.2 (#40)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Vision | — | 1265 |
Multilingual Not comparable
GPT-5.2 Codex: —, MiMo-V2.6-Pro: 57.0 (#15)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Non-English | — | 1474 |
| LMArena Chinese | — | 1532 |
| LMArena Russian | — | 1481 |
Instruction Following Not comparable
GPT-5.2 Codex: —, MiMo-V2.6-Pro: 78.2 (#10)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Instruction Following | — | 1490 |
Long Context Not comparable
GPT-5.2 Codex: —, MiMo-V2.6-Pro: 46.0 (#26)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Longer Query | — | 1500 |
Writing & Preference Not comparable
GPT-5.2 Codex: —, MiMo-V2.6-Pro: 66.9 (#32)
| Benchmark | GPT-5.2 Codex | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Text | — | 1491 |
| LMArena Creative Writing | — | 1465 |
| LMArena Multi-Turn | — | 1463 |
Frequently asked questions
Is GPT-5.2 Codex better than MiMo-V2.6-Pro?
MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 42.2 on the Noometry Index.
Which is cheaper, GPT-5.2 Codex or MiMo-V2.6-Pro?
MiMo-V2.6-Pro is cheaper. It lists at $0.43 per million input tokens and $0.87 per million output tokens; GPT-5.2 Codex lists at $1.75 and $14.
Is GPT-5.2 Codex or MiMo-V2.6-Pro better for coding?
MiMo-V2.6-Pro scores higher on coding benchmarks: 53.2 versus 45.4 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2.6-Pro does, with 1.05M tokens against 400K.
How many benchmarks do GPT-5.2 Codex and MiMo-V2.6-Pro share?
1 benchmark has published results for both models. GPT-5.2 Codex has 5 scored results on Noometry and MiMo-V2.6-Pro has 14.