Model comparison
GPT-5.5 Instant vs Pixtral Large
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 32.2 on the Noometry Index.
Last verified . 1 shared benchmarks.
Mistral AISummary
- They share 1 benchmark with published results for both. GPT-5.5 Instant scores higher in 3 categories and Pixtral Large in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.5 Instant leads 61.8 to 32.9.
- Pixtral Large has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Instant | Pixtral Large | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 42.7 | 32.2 |
| Released | 2026-05-05 | 2024-11-01 |
| Weights | Proprietary | Open |
| Context window | — | 128K |
| Max output | — | 128K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $6 |
| Results tracked | 27 | 3 |
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Category by category
Coding Not comparable
GPT-5.5 Instant: 44.3 (#74), Pixtral Large: —
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| SciCode | 48.6% | — |
| LMArena Coding | 1433 | — |
Reasoning GPT-5.5 Instant leads
GPT-5.5 Instant: 24.9 (#155), Pixtral Large: 21.7 (#218)
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| CritPt | 0% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | — | 0.8% |
| LMArena Hard Prompts | 1426 | — |
| Epoch Capabilities Index | 142.52 | — |
Math Not comparable
GPT-5.5 Instant: 26.5 (#259), Pixtral Large: —
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| FrontierMath (Tiers 1-3) | 26.3% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.1% | — |
| LMArena Math | 1420 | — |
Knowledge Not comparable
GPT-5.5 Instant: 48.9 (#74), Pixtral Large: —
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| GPQA Diamond | 82.5% | — |
| LMArena Expert | 1409 | — |
Multimodal GPT-5.5 Instant leads
GPT-5.5 Instant: 40.0 (#52), Pixtral Large: 30.6 (#111)
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| LMArena Vision | 1250 | 1089 |
| LMArena Document | 1403 | — |
Multilingual Not comparable
GPT-5.5 Instant: 52.8 (#80), Pixtral Large: —
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| LMArena Non-English | 1417 | — |
| LMArena Chinese | 1456 | — |
| LMArena French | 1428 | — |
| LMArena German | 1411 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1392 | — |
| LMArena Russian | 1431 | — |
| LMArena Spanish | 1429 | — |
Instruction Following Not comparable
GPT-5.5 Instant: 74.2 (#100), Pixtral Large: —
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| LMArena Instruction Following | 1406 | — |
Long Context Not comparable
GPT-5.5 Instant: 43.4 (#96), Pixtral Large: —
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| LMArena Longer Query | 1422 | — |
Writing & Preference GPT-5.5 Instant leads
GPT-5.5 Instant: 61.8 (#85), Pixtral Large: 32.9 (#278)
| Benchmark | GPT-5.5 Instant | Pixtral Large |
|---|---|---|
| LMArena Text | 1419 | — |
| LMArena Creative Writing | 1419 | — |
| EQ-Bench Creative Writing | — | 988 |
| LMArena Multi-Turn | 1433 | — |
Frequently asked questions
Is GPT-5.5 Instant better than Pixtral Large?
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 32.2 on the Noometry Index.
How many benchmarks do GPT-5.5 Instant and Pixtral Large share?
1 benchmark has published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Pixtral Large has 3.