Grok 4.6 vs GPT-6.1 Sol
Grok 4.6 is the specialist in graduate-level science questions and quick app prototypes; GPT-6.1 Sol is the more dependable all-round agent, with twice the context. Check Grok’s answers carefully — it still makes things up more than most.
Choose Grok 4.6 if
- Graduate-level science questions — 94.9% on GPQA Diamond.
- Turning a rough description into a working prototype.
Choose GPT-6.1 Sol if
- Longer inputs — 1.05M tokens against 500K.
- Agents that operate software.
- Customer-facing work, where a made-up answer is costly.
Side by side
| Grok 4.6 | GPT-6.1 Sol | |
|---|---|---|
| Made by | xAI | OpenAI |
| Released | August 2026 | September 2026 |
| Input price, per 1M tokens | $2.30 | $2.30 |
| Output price, per 1M tokens | $6.90 | $11.50 |
| Cached input, per 1M tokens | $0.575 | $0.115 |
| Batch (about half price) | No | Yes |
| Context window | 500K tokens | 1.05M tokens |
| Longest answer | — | 128K tokens |
| Reads | Text, Images | Text, Images |
| Thinks before answering | Always on | Always on |
| Open weights | No | No |
| Runs in Sri Lanka | No | No |
Prices are Roar AI’s published rates, live from our price list. Specs are each lab’s own published figures.
What a real job costs
Take 1,000 requests, each about 3,000 tokens in and 1,000 out — a long prompt and a page of answer.
Grok 4.6 does the same job for 1.3× less. Models that think before answering spend extra output tokens doing it, so on hard prompts the real gap can be wider than the rates suggest.
Use both, switch any time
On Roar AI both are on the same key and the same monthly invoice. Trying the other one is a one-word change:
client.chat.completions.create(model="grok-4.6", …) client.chat.completions.create(model="gpt-6.1-sol", …)
Send the same prompts to both for a day and compare the answers on your own work — that settles it faster than any benchmark. Read the docs.