Grok 4.5 vs GPT-5.6 Sol
xAI vs OpenAI — compared on intelligence, speed, price, and capabilities.
Quick answer
Grok 4.5 is about 5x cheaper per million output tokens and is faster, while GPT-5.6 Sol scores higher on intelligence (98 vs 94).
 Grok 4.5 |  GPT-5.6 Sol | |
|---|---|---|
| Intelligence | 94 | 98 |
| Speed | 95 | 85 |
| Input $ / 1M tokens | $2 | $5 |
| Output $ / 1M tokens | $6 | $30 |
Grok 4.5xAI/SpaceXAI flagship model for coding, agentic tasks, knowledge work, engineering, and efficient high-speed reasoning.
- ✓ reasoning
- ✓ temperature
- ✓ web search
- ✓ reasoning effort
- ✓ vision
- ✓ documents
- ✓ image generation
GPT-5.6 SolOpenAI's frontier GPT-5.6 model for complex professional work, with a 1.05M token context window, native web search, and image generation.
- ✓ reasoning
- ✓ web search
- ✓ reasoning effort
- ✓ vision
- ✓ documents
- ✓ image generation
Frequently asked questions
- Grok 4.5 vs GPT-5.6 Sol: which is better?
- Grok 4.5 is about 5x cheaper per million output tokens and is faster, while GPT-5.6 Sol scores higher on intelligence (98 vs 94).
- Which is cheaper?
- Grok 4.5 is about 5x cheaper: Grok 4.5 lists at $6 and GPT-5.6 Sol at $30 per million output tokens.
- Which is better for coding?
- GPT-5.6 Sol is the stronger pick for hard coding work: it scores higher on intelligence (98 vs 94), and it can reason step by step before answering. For quick edits, the faster or cheaper model is often enough.
- Can I use both together?
- Yes. In EVA's Multi Chat you send one prompt to Grok 4.5 and GPT-5.6 Sol at once and read the answers side by side, or use Split Chat to run two separate conversations next to each other. Both draw on the same EVA credit balance.
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