Model comparison
GPT-5.5 Instant vs MiniMax-M2.1
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 38.9 on the Noometry Index.
Last verified . 17 shared benchmarks.
MiniMaxSummary
- They share 17 benchmarks with published results for both. GPT-5.5 Instant scores higher in 7 categories and MiniMax-M2.1 in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in math, where MiniMax-M2.1 leads 38.3 to 26.5.
- MiniMax-M2.1 has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | MiniMax-M2.1 | |
|---|---|---|
| Provider | OpenAI | MiniMax |
| Noometry Index | 42.7 | 38.9 |
| Released | 2026-05-05 | 2025-12-23 |
| Weights | Proprietary | Open |
| Context window | — | 205K |
| Max output | — | 131K |
| Input $ / M tokens | — | $0.30 |
| Output $ / M tokens | — | $1.20 |
| Results tracked | 27 | 22 |
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Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 44.3 (#74), MiniMax-M2.1: 40.4 (#143)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Coding | 1433 | 1421 |
| LMArena WebDev | — | 1384 |
| SciCode | 48.6% | — |
| ALE-Bench | — | 623.83 |
Agentic & Tool Use Not comparable
GPT-5.5 Instant: —, MiniMax-M2.1: 27.9 (#98)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| Terminal-Bench | — | 36.6% |
Reasoning GPT-5.5 Instant leads
GPT-5.5 Instant: 24.9 (#155), MiniMax-M2.1: 16.6 (#302)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Hard Prompts | 1426 | 1411 |
| NYT Connections (extended) | — | 11.2% |
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| Epoch Capabilities Index | 142.52 | — |
Math MiniMax-M2.1 leads
GPT-5.5 Instant: 26.5 (#259), MiniMax-M2.1: 38.3 (#138)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Math | 1420 | 1397 |
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
Knowledge GPT-5.5 Instant leads
GPT-5.5 Instant: 48.9 (#74), MiniMax-M2.1: 38.3 (#147)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Expert | 1409 | 1431 |
| GPQA Diamond | 82.5% | — |
| Vectara Hallucination Rate | — | 11.8% |
Multimodal Not comparable
GPT-5.5 Instant: 40.0 (#52), MiniMax-M2.1: —
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual GPT-5.5 Instant leads
GPT-5.5 Instant: 52.8 (#80), MiniMax-M2.1: 50.0 (#128)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Non-English | 1417 | 1378 |
| LMArena Chinese | 1456 | 1430 |
| LMArena French | 1428 | 1404 |
| LMArena German | 1411 | 1381 |
| LMArena Japanese | 1408 | 1287 |
| LMArena Korean | 1392 | 1298 |
| LMArena Russian | 1431 | 1387 |
| LMArena Spanish | 1429 | 1397 |
Instruction Following Too close to call
GPT-5.5 Instant: 74.2 (#100), MiniMax-M2.1: 73.8 (#112)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Instruction Following | 1406 | 1400 |
Long Context Too close to call
GPT-5.5 Instant: 43.4 (#96), MiniMax-M2.1: 43.2 (#101)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Longer Query | 1422 | 1416 |
Writing & Preference GPT-5.5 Instant leads
GPT-5.5 Instant: 61.8 (#85), MiniMax-M2.1: 58.3 (#120)
| Benchmark | GPT-5.5 Instant | MiniMax-M2.1 |
|---|---|---|
| LMArena Text | 1419 | 1392 |
| LMArena Creative Writing | 1419 | 1361 |
| LMArena Multi-Turn | 1433 | 1396 |
Frequently asked questions
Is GPT-5.5 Instant better than MiniMax-M2.1?
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 38.9 on the Noometry Index.
Is GPT-5.5 Instant or MiniMax-M2.1 better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 40.4 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and MiniMax-M2.1 share?
17 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and MiniMax-M2.1 has 22.