GPT-6 Sol vs Step 5 Preview
GPT-6 Sol 
Step 5 Preview Verdict
- GPT-6 Sol (max) leads on quality: 67.7 vs 64.4.
- GPT-6 Sol (max) is stronger in composite, knowledge, multimodal, reasoning.
- Step 5 Preview is stronger in long context, coding.
- Step 5 Preview is 2.8× cheaper ($1.43 vs $4.00 per 1M blended).
- GPT-6 Sol (max) streams 1.5× faster (126 vs 84 tokens per second).
| Metric | GPT-6 Sol (max) | Step 5 Preview |
|---|---|---|
| BenchLeader Index | 67.7 | 64.4 |
| Composite score | 86.2 | 81.7 |
| Knowledge score | 75.4 | 70.5 |
| Long context score | 67.7 | 70.1 |
| Multimodal score | 67.1 | 60.0 |
| Reasoning score | 95.0 | 78.6 |
| Coding score | – | 68.8 |
| Blended price $/M | $4.00 | $1.43 |
| Output speed | 126 tok/s | 84 tok/s |
| Time to first answer | 107.2 s | 28.0 s |
| Context window | 1.1M | 1M |
| SciCode | – | 58.9% |
| AA Intelligence Index | 47.5 | 43.7 |
| AA-LCR | 83.7% | 88.3% |
| MMMU-Pro | 83.3% | 76.4% |
| AA-Omniscience | 27.1 | 16.4 |
| Humanity's Last Exam (AA) | 47.9% | 46.5% |
| SciCode (AA) | 57.6% | 58.9% |
| CritPt | 30.9% | 20.9% |
| GDPval (AA) | 49.4% | 53.3% |
| Terminal-Bench 4.0 (AA) | 43.9% | 33.3% |
| AutomationBench | 61.6% | 51.0% |
| GDP.pdf | 24.8% | 14.8% |
| MLCR | 16.1% | 16.7% |
| AA-Omniscience: accuracy | 54.5% | 41.5% |
| AA-Omniscience: non-hallucination | 39.9% | 57.0% |
| AA-Briefcase | 1483 | 1432 |
Data as of 2026-09-23. Best configuration of each model; every score links to its source on the model pages.
GPT-6 Sol vs Step 5 Preview: questions
- Is GPT-6 Sol better than Step 5 Preview?
- GPT-6 Sol (max) leads on quality: 67.7 vs 64.4. The BenchLeader Index combines every independent quality benchmark; GPT-6 Sol (max) is ahead overall as of 2026-09-23, but check the category scores for your use.
- Which is cheaper, GPT-6 Sol or Step 5 Preview?
- Step 5 Preview is cheaper: $1.43 against $4.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-6 Sol or Step 5 Preview?
- GPT-6 Sol streams faster: 126 against 84 output tokens per second.
- Which has the larger context window?
- GPT-6 Sol accepts more context: 1.1M against 1M tokens.