Model Comparator
Compare up to four models using the same criteria.
2 models compared
- Grok 4
SpaceXSI
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | Grok 4 SpaceXSI | Add a model · 2/4 | |
|---|---|---|---|
| Intelligence | 22.5 | Best: 22.7 | |
| Math | 92.7 | — | |
| Speed | 74 t/s | — | |
| TTFT | 12.6 s | — | |
| Input · $ / 1M tokens | Best: $3 | $5×1.7 relative to the lowest price among the compared models | |
| Output · $ / 1M tokens | Best: $15 | $30×2 relative to the lowest price among the compared models | |
| Context window | 256K | Best: 400K | |
| Reasoning | Yes | Yes | |
| Open weights | No | No |
Intelligence
- Grok 4
- 22.5
- GPT-5.5 Instant (May 2026)
- Best: 22.7
Math
- Grok 4
- 92.7
- GPT-5.5 Instant (May 2026)
- —
Speed
- Grok 4
- 74 t/s
- GPT-5.5 Instant (May 2026)
- —
TTFT
- Grok 4
- 12.6 s
- GPT-5.5 Instant (May 2026)
- —
Input · $ / 1M tokens
- Grok 4
- Best: $3
- GPT-5.5 Instant (May 2026)
- $5×1.7 relative to the lowest price among the compared models
Output · $ / 1M tokens
- Grok 4
- Best: $15
- GPT-5.5 Instant (May 2026)
- $30×2 relative to the lowest price among the compared models
Context window
- Grok 4
- 256K
- GPT-5.5 Instant (May 2026)
- Best: 400K
Reasoning
- Grok 4
- Yes
- GPT-5.5 Instant (May 2026)
- Yes
Open weights
- Grok 4
- No
- GPT-5.5 Instant (May 2026)
- No
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.
- Grok 422.5 · $6
- GPT-5.5 Instant (May 2026)22.7 · $11.25