Rate
Gemini 3.8 Flash vs GPT-6 Astra: price
Gemini 3.8 Flash is 13.3× cheaper than GPT-6 Astra for a typical chat workload (1,500 tokens in, 500 out).
| Item | Gemini 3.8 Flash | GPT-6 Astra |
|---|---|---|
| Input per 1M tokens | $0.75 | $10.00 |
| Output per 1M tokens | $3.75 | $50.00 |
| Cached input per 1M | $0.075 | $1.00 |
| 1,000 chat messages1,500 tokens in, 500 out each | $3.00 | $40.00 |
| Summarize a 50-page PDF30,000 tokens in, 1,000 out | $0.026 | $0.35 |
| One coding-agent task60,000 tokens in, 4,000 out, no caching | $0.06 | $0.80 |
Gemini 3.8 Flash: Promo price through Dec 31, 2026; $1.50 in / $7.50 out from Jan 1, 2027.
GPT-6 Astra: Prompts over 272K tokens: 2x input, 1.5x output.
List prices checked September 28, 2026. Price is half the story: see how people rate each one today.
Gemini 3.8 Flash vs GPT-6 Astra in numbers
Output, usually the bigger part of the bill, costs $3.75 on Gemini 3.8 Flash and $50.00 on GPT-6 Astra, so Gemini 3.8 Flash is 13.3× cheaper there. Input costs $0.75 versus $10.00 per million tokens. For a coding-agent task (60,000 tokens in, 4,000 out) that is $0.06 on Gemini 3.8 Flash and $0.80 on GPT-6 Astra. Gemini 3.8 Flash accepts 1.05M tokens of context and GPT-6 Astra 1.05M tokens. Gemini 3.8 Flash came out on September 2, 2026 and GPT-6 Astra on September 3, 2026.
Gemini 3.8 Flash is made by Google; GPT-6 Astra by OpenAI. Estimate your own bill for both in the cost calculator.
Which one feels dumber today?
- Gemini 3.8 FlashGoogle
–no votes yet - GPT-6 AstraOpenAI–no votes yet
Frequently asked questions
Is Gemini 3.8 Flash or GPT-6 Astra cheaper?
Gemini 3.8 Flash is 13.3× cheaper than GPT-6 Astra for a typical chat workload (1,500 tokens in, 500 out). Output, usually the bigger part of the bill, costs $3.75 on Gemini 3.8 Flash and $50.00 on GPT-6 Astra, so Gemini 3.8 Flash is 13.3× cheaper there.
Which is better, Gemini 3.8 Flash or GPT-6 Astra?
It depends on the task, and price is only part of it. Check how people rate each one today on the Gemini 3.8 Flash and GPT-6 Astra pages, and read what users report in Discussions.