Model comparison
GPT-5.6 Terra vs Phi-1.5
GPT-5.6 Terra has enough public results to be ranked (#17); Phi-1.5 does not yet, so treat this comparison as directional.
Last verified . 1 shared benchmarks.
MicrosoftSummary
- They share 1 benchmark with published results for both.
- Phi-1.5 has downloadable open weights; the other is API-only.
Side by side
| GPT-5.6 Terra | Phi-1.5 | |
|---|---|---|
| Provider | OpenAI | Microsoft |
| Noometry Index | 59.2 | — |
| Released | 2026-07-09 | 2023-09-11 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $12 | — |
| Results tracked | 52 | 7 |
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Category by category
Coding Not comparable
GPT-5.6 Terra: 57.7 (#19), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| DeepSWE | 69.6% | — |
| FrontierCode | 41.3% | — |
| CursorBench | 41.3% | — |
| LMArena WebDev | 1522 | — |
| SciCode | 55% | — |
| WeirdML | 78.3% | — |
| LMArena Coding | 1484 | — |
| ALE-Bench | 1,951 | — |
Agentic & Tool Use Not comparable
GPT-5.6 Terra: 40.1 (#25), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| APEX-Agents | 58.2% | — |
| BALROG | 53.2% | — |
| GDP.pdf | 24.7% | — |
| Vending-Bench 2 | 7,343 | — |
Reasoning Not comparable
GPT-5.6 Terra: 60.7 (#21), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| Epoch Capabilities Index | 159.62 | 91.53 |
| ARC-AGI-2 | 83.9% | — |
| SimpleBench | 48.9% | — |
| Kagi LLM Benchmark | 51.3% | — |
| NYT Connections (extended) | 78.4% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30% | — |
| Chess Puzzles | 54% | — |
| LMArena Hard Prompts | 1468 | — |
| Mystery Game Puzzles | 35% | — |
| DTBench | 93.3% | — |
| LMCA | 55% | — |
| Surface Evolver Bench | 83.8% | — |
| HellaSwag | — | 47.6% |
| WinoGrande | — | 73.4% |
Math Not comparable
GPT-5.6 Terra: 81.6 (#12), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 86% | — |
| FrontierMath Tier 4 | 70.7% | — |
| OTIS Mock AIME 2024-2025 | 99.7% | — |
| ProofBench | 74% | — |
| LMArena Math | 1466 | — |
Knowledge Not comparable
GPT-5.6 Terra: 61.2 (#30), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| GPQA Diamond | 93.3% | — |
| SimpleQA Verified | 43.2% | — |
| LMArena Expert | 1492 | — |
| ARC (AI2) Challenge | — | 44.4% |
| BoolQ | — | 75.8% |
| MMLU | — | 37.6% |
| OpenBookQA | — | 37.2% |
Multimodal Not comparable
GPT-5.6 Terra: 47.3 (#11), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| LMArena Vision | 1271 | — |
| Blueprint-Bench 2 | 30.8% | — |
| Furniture Assembly | 54.2% | — |
| LMArena Document | 1472 | — |
Multilingual Not comparable
GPT-5.6 Terra: 54.4 (#44), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| LMArena Non-English | 1439 | — |
| LMArena Chinese | 1513 | — |
| LMArena French | 1471 | — |
| LMArena German | 1460 | — |
| LMArena Japanese | 1457 | — |
| LMArena Korean | 1425 | — |
| LMArena Russian | 1450 | — |
| LMArena Spanish | 1448 | — |
Instruction Following Not comparable
GPT-5.6 Terra: 76.4 (#40), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| LMArena Instruction Following | 1454 | — |
Long Context Not comparable
GPT-5.6 Terra: 44.4 (#68), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| LMArena Longer Query | 1451 | — |
Writing & Preference Not comparable
GPT-5.6 Terra: 70.2 (#23), Phi-1.5: —
| Benchmark | GPT-5.6 Terra | Phi-1.5 |
|---|---|---|
| LMArena Text | 1447 | — |
| LMArena Creative Writing | 1410 | — |
| EQ-Bench Creative Writing | 1855 | — |
| EQ-Bench 4 | 1234 | — |
| LMArena Multi-Turn | 1449 | — |
Frequently asked questions
Is GPT-5.6 Terra better than Phi-1.5?
GPT-5.6 Terra has enough public results to be ranked (#17); Phi-1.5 does not yet, so treat this comparison as directional.
How many benchmarks do GPT-5.6 Terra and Phi-1.5 share?
1 benchmark has published results for both models. GPT-5.6 Terra has 52 scored results on Noometry and Phi-1.5 has 7.