Head-to-head · OpenAI vs xAI
GPT-6 Sol vs Grok 4.7
Quick answer: GPT-6 Sol stands out for strong balance of quality and cost. Grok 4.7 stands out for large context window at a moderate price. Reviewed September 2026.
Overview
GPT-6 Sol: GPT-6 Sol, launched on 22 September 2026, brings GPT-6 Astra's technology to a faster, cheaper model at $2 and $10 per million tokens. OpenAI states these are permanent prices, not promotional rates.
Grok 4.7: Grok 4.7 is xAI's latest flagship model for coding, agentic tasks and knowledge work. It has a 500,000-token context window, accepts text and image input, and supports adjustable reasoning levels.
At a glance
| Dimension | GPT-6 Sol | Grok 4.7 |
|---|---|---|
| Vendor | OpenAI | xAI |
| Starting price | API: $2 in / $10 out per M tokens | API: $2 to $4 in / $6 to $12 out per M tokens |
| Pricing model | Paid | Paid |
| Free tier | No | No |
| Category | Generative AI | Generative AI |
Strengths and limits
GPT-6 Sol
- Strong balance of quality and cost
- Price is permanent, not introductory
- Good default for production workloads
Watch out for
- Below Astra on the hardest tasks
- Newest release with limited track record
- Competes closely with Claude Sonnet 5 on price
Grok 4.7
- Large context window at a moderate price
- Strong on coding and agent tasks
- Real-time knowledge through the xAI ecosystem
Watch out for
- Smaller enterprise ecosystem than OpenAI, Anthropic or Google
- Price steps up for prompts over 200,000 tokens
- Fewer professional integrations
Key features
GPT-6 Sol
- Built on GPT-6 Astra technology
- Permanent $2 and $10 per million token pricing
- Faster responses than Astra
- Available through the OpenAI API
Grok 4.7
- 500,000-token context window
- Text and image input
- Flexible reasoning levels
- Available through the xAI API
Pricing compared
GPT-6 Sol is priced by usage rather than by seat: API: $2 in / $10 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Grok 4.7 is priced by usage rather than by seat: API: $2 to $4 in / $6 to $12 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Frequently asked questions
Which is better, GPT-6 Sol or Grok 4.7?
It depends on the work. GPT-6 Sol stands out for strong balance of quality and cost. Grok 4.7 stands out for large context window at a moderate price.
How do GPT-6 Sol and Grok 4.7 compare on price?
GPT-6 Sol is priced by usage rather than by seat: API: $2 in / $10 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing. Grok 4.7 is priced by usage rather than by seat: API: $2 to $4 in / $6 to $12 out per M tokens. That means cost scales with how much text you send and receive, so estimate your monthly volume before committing.
Is there a free option between GPT-6 Sol and Grok 4.7?
Neither lists a permanent free tier. Look for trials or usage-based pricing to test on real work first.