Model comparison
GPT-5.5 Pro vs Tulu 3 (Tülu 3) 70B
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 33.0 on the Noometry Index.
Last verified . 2 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 2 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and Tulu 3 (Tülu 3) 70B in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 14.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for GPT-5.5 Pro and 4.4% for Tulu 3 (Tülu 3) 70B.
- Tulu 3 (Tülu 3) 70B has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B | |
|---|---|---|
| Provider | OpenAI | Allen Institute for AI (Ai2) |
| Noometry Index | 64.3 | 33.0 |
| Released | 2026-04-23 | 2024-11-21 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 14 | 14 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Tulu 3 (Tülu 3) 70B: 36.0 (#214)
| Benchmark | GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Coding | — | 1235 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Tulu 3 (Tülu 3) 70B: 23.9 (#169)
| Benchmark | GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1220 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.07 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), Tulu 3 (Tülu 3) 70B: 14.2 (#303)
| Benchmark | GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 4.4% |
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| LMArena Math | — | 1242 |
| MATH Level 5 | — | 42.7% |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.1 (#19), Tulu 3 (Tülu 3) 70B: 25.0 (#264)
| Benchmark | GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| GPQA Diamond | 93.9% | 46.3% |
Multilingual Not comparable
GPT-5.5 Pro: —, Tulu 3 (Tülu 3) 70B: 39.9 (#222)
| Benchmark | GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Non-English | — | 1236 |
| LMArena Chinese | — | 1249 |
| LMArena Russian | — | 1246 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Tulu 3 (Tülu 3) 70B: 64.8 (#227)
| Benchmark | GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Instruction Following | — | 1233 |
Long Context Not comparable
GPT-5.5 Pro: —, Tulu 3 (Tülu 3) 70B: 37.1 (#222)
| Benchmark | GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Longer Query | — | 1224 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Tulu 3 (Tülu 3) 70B: 45.6 (#223)
| Benchmark | GPT-5.5 Pro | Tulu 3 (Tülu 3) 70B |
|---|---|---|
| LMArena Text | — | 1256 |
| LMArena Creative Writing | — | 1231 |
| LMArena Multi-Turn | — | 1252 |
Frequently asked questions
Is GPT-5.5 Pro better than Tulu 3 (Tülu 3) 70B?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 33.0 on the Noometry Index.
How many benchmarks do GPT-5.5 Pro and Tulu 3 (Tülu 3) 70B share?
2 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Tulu 3 (Tülu 3) 70B has 14.