Head-to-head · Google vs OpenAI
Gemini 3.8 Flash vs GPT-6 Sol
Quick answer: Gemini 3.8 Flash stands out for strong quality for a fast, low-cost model. GPT-6 Sol stands out for strong balance of quality and cost. 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.
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.
At a glance
| Dimension | Gemini 3.8 Flash | GPT-6 Sol |
|---|---|---|
| Vendor | OpenAI | |
| Starting price | API: $0.75 in / $3.75 out per M tokens | API: $2 in / $10 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
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
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
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
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.
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.
Profession-fit verdict
8 roles where both tools are recommended. A higher relevance score means a better fit for that job.
| Profession | Gemini 3.8 Flash score | GPT-6 Sol score |
|---|---|---|
| Nurse | 7/10 | 8/10 |
| Doctor | 7/10 | 8/10 |
| Dentist | 7/10 | 8/10 |
| Pharmacist | 7/10 | 8/10 |
| Physical Therapist | 7/10 | 8/10 |
| Mental Health Counselor | 7/10 | 8/10 |
| Veterinarian | 7/10 | 8/10 |
| Medical Coder | 7/10 | 8/10 |
Frequently asked questions
Which is better, Gemini 3.8 Flash or GPT-6 Sol?
It depends on the work. Gemini 3.8 Flash stands out for strong quality for a fast, low-cost model. GPT-6 Sol stands out for strong balance of quality and cost. Across 8 professions where both are rated, GPT-6 Sol ranks higher more often (8 roles).
How do Gemini 3.8 Flash and GPT-6 Sol 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. 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.
Is there a free option between Gemini 3.8 Flash and GPT-6 Sol?
Neither lists a permanent free tier. Look for trials or usage-based pricing to test on real work first.