Model comparison
GPT-5.5 Pro vs Trinity Large Thinking
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 38.6 on the Noometry Index. Trinity Large Thinking costs 174× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Last verified . 1 shared benchmarks.
Arcee AISummary
- They share 1 benchmark with published results for both. GPT-5.5 Pro scores higher in 3 categories and Trinity Large Thinking in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.3 to 16.9.
- The biggest single-benchmark swing is CritPt: 30.6% for GPT-5.5 Pro and 0.9% for Trinity Large Thinking.
- Trinity Large Thinking is cheaper at $0.25 / $0.80 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 262K.
- Trinity Large Thinking has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Trinity Large Thinking | |
|---|---|---|
| Provider | OpenAI | Arcee AI |
| Noometry Index | 64.3 | 38.6 |
| Released | 2026-04-23 | 2026-04-01 |
| Weights | Proprietary | Open |
| Context window | 1.05M | 262K |
| Max output | 128K | 80K |
| Input $ / M tokens | $30 | $0.25 |
| Output $ / M tokens | $180 | $0.80 |
| Results tracked | 14 | 24 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Trinity Large Thinking: 34.1 (#244)
| Benchmark | GPT-5.5 Pro | Trinity Large Thinking |
|---|---|---|
| LMArena WebDev | — | 1238 |
| SciCode | — | 36.1% |
| LMArena Coding | — | 1381 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Trinity Large Thinking: 16.9 (#298)
| Benchmark | GPT-5.5 Pro | Trinity Large Thinking |
|---|---|---|
| CritPt | 30.6% | 0.9% |
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| NYT Connections (extended) | — | 16.5% |
| ARC-AGI-1 | 96.5% | — |
| Chess Puzzles | 64% | — |
| Thematic Generalization | — | 41.6% |
| LMArena Hard Prompts | — | 1350 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Surface Evolver Bench | — | 15.6% |
| Epoch Capabilities Index | 162.07 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), Trinity Large Thinking: 37.6 (#149)
| Benchmark | GPT-5.5 Pro | Trinity Large Thinking |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1366 |
| 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), Trinity Large Thinking: 40.9 (#113)
| Benchmark | GPT-5.5 Pro | Trinity Large Thinking |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| Vectara Hallucination Rate | — | 6.9% |
| LMArena Expert | — | 1360 |
Multilingual Not comparable
GPT-5.5 Pro: —, Trinity Large Thinking: 46.2 (#160)
| Benchmark | GPT-5.5 Pro | Trinity Large Thinking |
|---|---|---|
| LMArena Non-English | — | 1325 |
| LMArena Chinese | — | 1373 |
| LMArena French | — | 1374 |
| LMArena German | — | 1356 |
| LMArena Japanese | — | 1311 |
| LMArena Korean | — | 1306 |
| LMArena Russian | — | 1337 |
| LMArena Spanish | — | 1357 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Trinity Large Thinking: 70.5 (#162)
| Benchmark | GPT-5.5 Pro | Trinity Large Thinking |
|---|---|---|
| LMArena Instruction Following | — | 1334 |
Long Context Not comparable
GPT-5.5 Pro: —, Trinity Large Thinking: 41.3 (#144)
| Benchmark | GPT-5.5 Pro | Trinity Large Thinking |
|---|---|---|
| LMArena Longer Query | — | 1355 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Trinity Large Thinking: 53.8 (#158)
| Benchmark | GPT-5.5 Pro | Trinity Large Thinking |
|---|---|---|
| LMArena Text | — | 1340 |
| LMArena Creative Writing | — | 1320 |
| LMArena Multi-Turn | — | 1342 |
Frequently asked questions
Is GPT-5.5 Pro better than Trinity Large Thinking?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 38.6 on the Noometry Index. Trinity Large Thinking costs 174× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.5 Pro or Trinity Large Thinking?
Trinity Large Thinking is cheaper. It lists at $0.25 per million input tokens and $0.80 per million output tokens; GPT-5.5 Pro lists at $30 and $180.
Which has the bigger context window?
GPT-5.5 Pro does, with 1.05M tokens against 262K.
How many benchmarks do GPT-5.5 Pro and Trinity Large Thinking share?
1 benchmark has published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Trinity Large Thinking has 24.