Model comparison
GPT-5.5 Instant vs Nova 2.0 Pro Preview
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 32.8 on the Noometry Index.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. GPT-5.5 Instant scores higher in 2 categories and Nova 2.0 Pro Preview in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in coding, where GPT-5.5 Instant leads 43.7 to 40.2.
- The biggest single-benchmark swing is SciCode: 48.6% for GPT-5.5 Instant and 42.7% for Nova 2.0 Pro Preview.
Side by side
| GPT-5.5 Instant | Nova 2.0 Pro Preview | |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 42.5 | 32.8 |
| Released | 2026-05-05 | 2025-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 27 | 3 |
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Category by category
Coding GPT-5.5 Instant leads
GPT-5.5 Instant: 43.7 (#73), Nova 2.0 Pro Preview: 40.2 (#130)
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| SciCode | 48.6% | 42.7% |
| LMArena Coding | 1433 | — |
Agentic & Tool Use Not comparable
GPT-5.5 Instant: —, Nova 2.0 Pro Preview: 21.9 (#127)
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| GDP.pdf | — | 2% |
Reasoning GPT-5.5 Instant leads
GPT-5.5 Instant: 24.2 (#149), Nova 2.0 Pro Preview: 21.7 (#189)
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| CritPt | 0% | 0% |
| Chess Puzzles | 12% | — |
| LMArena Hard Prompts | 1426 | — |
| Epoch Capabilities Index | 142.48 | — |
Math Not comparable
GPT-5.5 Instant: 26.1 (#241), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| 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 (#68), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| GPQA Diamond | 82.5% | — |
| LMArena Expert | 1409 | — |
Multimodal Not comparable
GPT-5.5 Instant: 39.3 (#48), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Vision | 1250 | — |
| LMArena Document | 1403 | — |
Multilingual Not comparable
GPT-5.5 Instant: 53.0 (#76), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Non-English | 1417 | — |
| LMArena Chinese | 1457 | — |
| LMArena French | 1428 | — |
| LMArena German | 1410 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1393 | — |
| LMArena Russian | 1430 | — |
| LMArena Spanish | 1430 | — |
Instruction Following Not comparable
GPT-5.5 Instant: 74.4 (#94), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Instruction Following | 1407 | — |
Long Context Not comparable
GPT-5.5 Instant: 43.4 (#92), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Longer Query | 1422 | — |
Writing & Preference Not comparable
GPT-5.5 Instant: 62.0 (#81), Nova 2.0 Pro Preview: —
| Benchmark | GPT-5.5 Instant | Nova 2.0 Pro Preview |
|---|---|---|
| LMArena Text | 1419 | — |
| LMArena Creative Writing | 1420 | — |
| LMArena Multi-Turn | 1434 | — |
Frequently asked questions
Is GPT-5.5 Instant better than Nova 2.0 Pro Preview?
GPT-5.5 Instant is the stronger model overall, scoring 42.5 to 32.8 on the Noometry Index.
Is GPT-5.5 Instant or Nova 2.0 Pro Preview better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 40.2 in the Noometry coding category.
How many benchmarks do GPT-5.5 Instant and Nova 2.0 Pro Preview share?
2 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Nova 2.0 Pro Preview has 3.