Model comparison
GPT-5.4 Pro vs MiMo-V2.6-Flash
GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 44.4 on the Noometry Index. MiMo-V2.6-Flash costs 386× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where GPT-5.4 Pro leads 71.0 to 29.6.
- MiMo-V2.6-Flash is cheaper at $0.14 / $0.28 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 1.05M.
- MiMo-V2.6-Flash has downloadable open weights; the other is API-only.
Side by side
| GPT-5.4 Pro | MiMo-V2.6-Flash | |
|---|---|---|
| Provider | OpenAI | Xiaomi |
| Noometry Index | 58.8 | 44.4 |
| Released | 2026-03-05 | 2026-09-22 |
| Weights | Proprietary | Open |
| Context window | 1.05M | 1.05M |
| Max output | 128K | 131K |
| Input $ / M tokens | $30 | $0.14 |
| Output $ / M tokens | $180 | $0.28 |
| Results tracked | 16 | 13 |
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Category by category
Coding MiMo-V2.6-Flash leads
GPT-5.4 Pro: 42.6 (#89), MiMo-V2.6-Flash: 44.3 (#68)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| WeirdML | 57.4% | — |
| LMArena Coding | — | 1516 |
Reasoning GPT-5.4 Pro leads
GPT-5.4 Pro: 71.0 (#10), MiMo-V2.6-Flash: 29.6 (#82)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| ARC-AGI-2 | 83.3% | — |
| SimpleBench | 74.1% | — |
| ARC-AGI-1 | 94.5% | — |
| CritPt | 30% | — |
| Chess Puzzles | 58.6% | — |
| EnigmaEval | 23.8% | — |
| LMArena Hard Prompts | — | 1481 |
| Epoch Capabilities Index | 159.12 | — |
Math GPT-5.4 Pro leads
GPT-5.4 Pro: 72.0 (#17), MiMo-V2.6-Flash: 37.4 (#97)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | — |
| FrontierMath Tier 4 | 58.5% | — |
| LMArena Math | — | 1477 |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |
Knowledge GPT-5.4 Pro leads
GPT-5.4 Pro: 68.3 (#6), MiMo-V2.6-Flash: 42.0 (#91)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| GPQA Diamond | 94.6% | — |
| Humanity's Last Exam | 44.3% | — |
| SimpleQA Verified | 46.3% | — |
| Vectara Hallucination Rate | 8.3% | — |
| LMArena Expert | — | 1516 |
Multimodal Not comparable
GPT-5.4 Pro: —, MiMo-V2.6-Flash: 40.2 (#39)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Vision | — | 1266 |
Multilingual Not comparable
GPT-5.4 Pro: —, MiMo-V2.6-Flash: 54.6 (#41)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Non-English | — | 1439 |
| LMArena Chinese | — | 1501 |
| LMArena Russian | — | 1424 |
Instruction Following Not comparable
GPT-5.4 Pro: —, MiMo-V2.6-Flash: 77.0 (#33)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Instruction Following | — | 1463 |
Long Context Not comparable
GPT-5.4 Pro: —, MiMo-V2.6-Flash: 44.8 (#52)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Longer Query | — | 1465 |
Writing & Preference Not comparable
GPT-5.4 Pro: —, MiMo-V2.6-Flash: 63.9 (#61)
| Benchmark | GPT-5.4 Pro | MiMo-V2.6-Flash |
|---|---|---|
| LMArena Text | — | 1459 |
| LMArena Creative Writing | — | 1408 |
| LMArena Multi-Turn | — | 1460 |
Frequently asked questions
Is GPT-5.4 Pro better than MiMo-V2.6-Flash?
GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 44.4 on the Noometry Index. MiMo-V2.6-Flash costs 386× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.4 Pro or MiMo-V2.6-Flash?
MiMo-V2.6-Flash is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; GPT-5.4 Pro lists at $30 and $180.
Is GPT-5.4 Pro or MiMo-V2.6-Flash better for coding?
MiMo-V2.6-Flash scores higher on coding benchmarks: 44.3 versus 42.6 in the Noometry coding category.
Which has the bigger context window?
GPT-5.4 Pro does, with 1.05M tokens against 1.05M.
How many benchmarks do GPT-5.4 Pro and MiMo-V2.6-Flash share?
0 benchmarks have published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and MiMo-V2.6-Flash has 13.