Head-to-head · Google vs xAI
Gemini 3.8 Flash vs Grok 4.7
Quick answer: Gemini 3.8 Flash stands out for strong quality for a fast, low-cost model. Grok 4.7 stands out for large context window at a moderate price. Reviewed September 2026.
Overview
Gemini 3.8 Flash: Gemini 3.8 Flash, released on 2 September 2026, is Google's newest Flash model, aimed at long-horizon engineering and agent tasks. It is priced at $0.75 and $3.75 per million tokens, a rate Google lists through 31 December 2026, after which it rises to $1.50 and $7.50.
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 | Gemini 3.8 Flash | Grok 4.7 |
|---|---|---|
| Vendor | xAI | |
| Starting price | API: $0.75 in / $3.75 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
Gemini 3.8 Flash
- Strong quality for a fast, low-cost model
- Well suited to agentic and coding workflows
- Backed by Google's multimodal stack
Watch out for
- Listed price applies through 31 December 2026
- Below Pro-tier models on the hardest reasoning
- Very new, so limited independent evaluations
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
Gemini 3.8 Flash
- Latest Flash-tier Gemini model
- Built for agents and long-horizon engineering tasks
- Low per-token price
- Available through the Gemini API
Grok 4.7
- 500,000-token context window
- Text and image input
- Flexible reasoning levels
- Available through the xAI API
Pricing compared
Gemini 3.8 Flash is priced by usage rather than by seat: API: $0.75 in / $3.75 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, Gemini 3.8 Flash or Grok 4.7?
It depends on the work. Gemini 3.8 Flash stands out for strong quality for a fast, low-cost model. Grok 4.7 stands out for large context window at a moderate price.
How do Gemini 3.8 Flash and Grok 4.7 compare on price?
Gemini 3.8 Flash is priced by usage rather than by seat: API: $0.75 in / $3.75 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 Gemini 3.8 Flash and Grok 4.7?
Neither lists a permanent free tier. Look for trials or usage-based pricing to test on real work first.