Model Comparator
Compare up to four models using the same criteria.
2 models compared
- GPT-5.5 (Low)
OpenAI
- K2 Horizon 375B A23B
Institute of Foundation Models
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | GPT-5.5 (Low) OpenAI | K2 Horizon 375B A23B Institute of Foundation Models | Add a model · 2/4 |
|---|---|---|---|
| Intelligence | Best: 30.7 | 30.5 | |
| Coding | 60.9 | Best: 61.5 | |
| Agentic | — | 40 | |
| Speed | 82.7 t/s | Best: 480 t/s | |
| TTFT | Best: 1.47 s | 2.72 s | |
| Input · $ / 1M tokens | $5 | — | |
| Output · $ / 1M tokens | $30 | — | |
| Context window | Best: 922K | 524K | |
| Reasoning | Yes | Yes | |
| Open weights | No | Yes | |
| Cost / task | — | $0 |
Intelligence
- GPT-5.5 (Low)
- Best: 30.7
- K2 Horizon 375B A23B
- 30.5
Coding
- GPT-5.5 (Low)
- 60.9
- K2 Horizon 375B A23B
- Best: 61.5
Agentic
- GPT-5.5 (Low)
- —
- K2 Horizon 375B A23B
- 40
Speed
- GPT-5.5 (Low)
- 82.7 t/s
- K2 Horizon 375B A23B
- Best: 480 t/s
TTFT
- GPT-5.5 (Low)
- Best: 1.47 s
- K2 Horizon 375B A23B
- 2.72 s
Input · $ / 1M tokens
- GPT-5.5 (Low)
- $5
- K2 Horizon 375B A23B
- —
Output · $ / 1M tokens
- GPT-5.5 (Low)
- $30
- K2 Horizon 375B A23B
- —
Context window
- GPT-5.5 (Low)
- Best: 922K
- K2 Horizon 375B A23B
- 524K
Reasoning
- GPT-5.5 (Low)
- Yes
- K2 Horizon 375B A23B
- Yes
Open weights
- GPT-5.5 (Low)
- No
- K2 Horizon 375B A23B
- Yes
Cost / task
- GPT-5.5 (Low)
- —
- K2 Horizon 375B A23B
- $0
Each reasoning level remains a separate configuration.
Score and cost
Each line joins the reasoning levels of a compared model; the large point marks the configuration in the table. The top-right corner holds the best score for the lowest cost. Select another point to compare that level.
- GPT-5.5 (Low)30.7 · 82.7 t/s
- K2 Horizon 375B A23B30.5 · 480 t/s