Gemini 3.8 Flash vs GPT-6 Luna: API price comparison (2026)
As of 2026-10-17, By blended price, GPT-6 Luna is cheaper — about 7.5× less. Gemini 3.8 Flash: $0.75 / $3.75 (Official (Intl)); GPT-6 Luna: $0.1 / $0.5 (Official (Intl)), per 1M input/output tokens.
 Gemini 3.8 Flash |  GPT-6 Luna | |
|---|---|---|
| Blended | $1.5 | $0.2 |
| Cheapest channel | Official (Intl) | Official (Intl) |
| AA Intelligence | 40.9 | 38.1 |
| Context | 1M | 1.1M |
| China usability | ✗CN direct?Alipay·unverified?ID·unverified?Intl card·unverified Official (Intl) | ✗CN direct?Alipay·unverified?ID·unverified?Intl card·unverified Official (Intl) |
Gemini 3.8 Flash
| Channel | Blended | Input | Output | Cached | Access & payment (this channel) | Notes | Source |
|---|---|---|---|---|---|---|---|
| Official (Intl) $0.75 / $3.75 | $1.5 | $0.75 | $3.75 | $0.075 | ✗CN direct?Alipay·unverified?ID·unverified?Intl card·unverified conditions source2026-10-17 | Until 2026-12-31; from 2027-01-01 input $1.50 / output $7.50 models.dev ✓ | ai.google.dev 2026-10-17 |
| OpenRouter $0.75 / $3.75 | $1.5 | $0.75 | $3.75 | $0.075 | ✗CN direct✓Alipay✗ID✗Intl card conditions source2026-10-17 | Original vendor endpoint: Google AI Studio | openrouter.ai 2026-10-17 |
GPT-6 Luna
| Channel | Blended | Input | Output | Cached | Access & payment (this channel) | Notes | Source |
|---|---|---|---|---|---|---|---|
| Official (Intl) $0.1 / $0.5 | $0.2 | $0.1 | $0.5 | $0.01 | ✗CN direct?Alipay·unverified?ID·unverified?Intl card·unverified conditions source2026-10-17 | Standard tier, short context. Long context: in $0.20 / out $0.75 models.dev ✓ | platform.openai.com 2026-10-17 |
| OpenRouter $0.1 / $0.5 | $0.2 | $0.1 | $0.5 | $0.01 | ✗CN direct✓Alipay✗ID✗Intl card conditions source2026-10-17 | Original vendor endpoint: OpenAI Licensed cloud alternative: Azure $0.1 / $0.5 | openrouter.ai 2026-10-17 |
Gemini hub · GPT (OpenAI) hub ·
FAQ
Which is cheaper, Gemini 3.8 Flash or GPT-6 Luna?
As of 2026-10-17, By blended price, GPT-6 Luna is cheaper — about 7.5× less. Gemini 3.8 Flash: $0.75 / $3.75 (Official (Intl)); GPT-6 Luna: $0.1 / $0.5 (Official (Intl)), per 1M input/output tokens.
What are the context windows of Gemini 3.8 Flash and GPT-6 Luna?
Gemini 3.8 Flash: 1M; GPT-6 Luna: 1.1M.
Can I use Gemini 3.8 Flash and GPT-6 Luna directly from mainland China?
Gemini 3.8 Flash（Official (Intl)）direct no, Alipay unverified; GPT-6 Luna（Official (Intl)）direct no, Alipay unverified. Via each cheapest channel.
Which is stronger, Gemini 3.8 Flash or GPT-6 Luna?
Artificial Analysis Intelligence Index (via OpenRouter rankings, 2026-10-17): Gemini 3.8 Flash 40.9, GPT-6 Luna 38.1.
How much can I save switching between them?
Blended (0.75×in+0.25×out): Gemini 3.8 Flash $1.5 vs GPT-6 Luna $0.2, a difference of $1.3 per 1M tokens.