Gemini 3.8 Live Extended Thinking
Summary
Gemini 3.8 Live Extended Thinking is a proprietary language model from Google DeepMind, released on 15 Sept 2026. It accepts text and audio and generates text and audio, with a 131K-token context window and up to 66K output tokens per response. As of 21 Oct 2026, the lowest listed API price is $0.75 per million input tokens and $4.50 per million output tokens (Vercel AI Gateway), across 1 provider we track.
Live API voice model with configurable background reasoning for multi-step real-time agents
Last verified 21 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Google DeepMind |
|---|---|
| Release date | 15 Sept 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 131K (131,072 tokens) [models.dev] |
| Max output | 66K tokens [models.dev] |
| Input | Text and audio [models.dev] |
| Output | Text and audio [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | Yes [models.dev] |
Gemini 3.8 Live Extended Thinking API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| Vercel AI Gateway google/gemini-3.8-live-extended-thinking | $0.75 | $4.50 | – | 131K | models.dev, 21 Oct 2026 |
Frequently asked questions
What is the context window of Gemini 3.8 Live Extended Thinking?
Gemini 3.8 Live Extended Thinking has a context window of 131,072 tokens (131K) and can generate up to 65,536 tokens in a single response, according to models.dev.
How much does the Gemini 3.8 Live Extended Thinking API cost?
Gemini 3.8 Live Extended Thinking is listed from $0.75 per million input tokens and $4.50 per million output tokens (Vercel AI Gateway). Prices last verified 21 Oct 2026.
Is Gemini 3.8 Live Extended Thinking open source?
No. Gemini 3.8 Live Extended Thinking is a proprietary model; Google DeepMind has not released its weights. It is available through APIs including Vercel AI Gateway.
When was Gemini 3.8 Live Extended Thinking released?
Google DeepMind released Gemini 3.8 Live Extended Thinking on 15 Sept 2026, according to models.dev.
Change history
- Context window changed from none to 131K
- Max output changed from none to 66K
- Tool calling changed from no to yes
- Added to the directory
- Now listed on Vercel AI Gateway