Google's newest Flash model — $0.75/$3.75 per 1M tokens through the end of 2026, same intro rate as 3.6 and 3.7 Flash, but gated to paying AI Pro/Ultra subscribers rather than the free tier.
Gemini 3.8 Flash bills $0.75 / 1M input and $3.75 / 1M output through Dec 31, 2026 as an introductory rate — identical to Gemini 3.6 and 3.7 Flash. Cached input is $0.075 / 1M. The rate reverts to a standard $1.50/$7.50 on Jan 1, 2027.
Google released Gemini 3.8 Flash on September 2, 2026, three weeks after Gemini 3.7 Flash. It ships at the same introductory $0.75 input / $3.75 output per 1M tokens as its two immediate predecessors, Gemini 3.6 Flash and 3.7 Flash — all three now sit at an identical price point through the end of 2026. The notable change is access: 3.8 Flash is available only to Google AI Pro and AI Ultra subscribers, unlike 3.6 Flash, which remains the default model on Gemini's free tier.
As with 3.7 Flash's intro pricing, the discount is temporary: Google's docs list Jan 1, 2027 as the date rates revert to a standard $1.50/$7.50 per 1M. Build cost models accordingly if your workload extends past the new year.
3.8 Flash inherits the native multimodality of the Gemini family — text, image, audio, and video input across a 1M token context. Google has not published a detailed capability changelog versus 3.7 Flash at launch; treat it as an incremental refresh in the same Flash tier until more benchmark detail is published.
| Model | Input / 1M | Output / 1M | Context |
|---|---|---|---|
| Gemini 3.8 Flash (intro) | $0.75 | $3.75 | 1M |
| Gemini 3.7 Flash (intro) | $0.75 | $3.75 | 1M |
| Gemini 3.6 Flash (intro) | $0.75 | $3.75 | 1M |
| Gemini 3.5 Flash-Lite | $0.30 | $2.50 | 1M |
| GPT-5.6 Luna | $0.20 | $1.20 | 1M |
All three current-generation Flash models cost the same through 2026, so the choice mostly comes down to access: 3.8 Flash requires an AI Pro or Ultra subscription, while 3.6 Flash stays free. Flash-Lite is still the cheaper-volume option, and GPT-5.6 Luna undercuts all of them on raw price but lacks native video.